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From Viktor Somogyi <viktorsomo...@gmail.com>
Subject Re: [DISCUSS] KIP 226 - Dynamic Broker Configuration
Date Thu, 25 Jan 2018 11:51:06 GMT
Yea, if other commands seem to follow this pattern, I'll update KIP-248 as
well :). Also introducing those arguments in the current ConfigCommand also
makes sense from the migration point of view too as it will be introduced
in 1.1 which makes it somewhat easier for KIP-248.

On Wed, Jan 24, 2018 at 6:46 PM, Rajini Sivaram <rajinisivaram@gmail.com>
wrote:

> Hi Ismael,
>
> Yes, that makes sense. Looking at the command line options for different
> tools, we seem to be using *--command-config <configFile> *in the commands
> that currently talk to the new AdminClient (DelegationTokenCommand,
> ConsumerGroupCommand, DeleteRecordsCommand). So perhaps it makes sense to
> do the same for ConfigCommand as well. I will update KIP-226 with the two
> options *--bootstrap-server* and *--command-config*.
>
> Viktor, what do you think?
>
> At the moment, I think many in the community are busy due to the code
> freeze next week, but hopefully we should get more feedback on KIP-248 soon
> after.
>
> Thank you,
>
> Rajini
>
> On Wed, Jan 24, 2018 at 5:41 AM, Viktor Somogyi <viktorsomogyi@gmail.com>
> wrote:
>
> > Hi all,
> >
> > I'd also like to as the community here who were participating the
> > discussion of KIP-226 to take a look at KIP-248 (that is making
> > kafka-configs.sh fully function with AdminClient and a Java based
> > ConfigCommand). It would be much appreciated to get feedback on that as
> it
> > plays an important role for KIP-226 and other long-waited features.
> >
> > Thanks,
> > Viktor
> >
> > On Wed, Jan 24, 2018 at 6:56 AM, Ismael Juma <ismael@juma.me.uk> wrote:
> >
> > > Hi Rajini,
> > >
> > > I think the proposal makes sense. One suggestion: can we just allow the
> > > config to be passed? That is, leave out the properties config for now.
> > >
> > > On Tue, Jan 23, 2018 at 3:01 PM, Rajini Sivaram <
> rajinisivaram@gmail.com
> > >
> > > wrote:
> > >
> > > > Since we are running out of time to get the whole ConfigCommand
> > converted
> > > > to using the new AdminClient for 1.1.0 (KIP-248), we need a way to
> > enable
> > > > ConfigCommand to handle broker config updates (implemented by
> KIP-226).
> > > As
> > > > a simple first step, it would make sense to use the existing
> > > ConfigCommand
> > > > tool to perform broker config updates enabled by this KIP. Since
> config
> > > > validation and password encryption are performed by the broker, this
> > will
> > > > be easier to do with the new AdminClient. To do this, we need to add
> > > > command line options for new admin client to kafka-configs.sh.
> Dynamic
> > > > broker config updates alone will be done under KIP-226 using the new
> > > admin
> > > > client to make this feature usable.. The new command line options
> > > > (consistent with KIP-248) that will be added to ConfigCommand will
> be:
> > > >
> > > >    - --bootstrap-server *host:port*
> > > >    - --adminclient.config *config-file*
> > > >    - --adminclient.properties *k1=v1,k2=v2*
> > > >
> > > > If anyone has any concerns about these options being added to
> > > > kafka-configs.sh, please let me know. Otherwise, I will update
> KIP-226
> > > and
> > > > add the options to one of the KIP-226 PRs.
> > > >
> > > > Thank you,
> > > >
> > > > Rajini
> > > >
> > > > On Wed, Jan 10, 2018 at 5:14 AM, Ismael Juma <ismael@juma.me.uk>
> > wrote:
> > > >
> > > > > Thanks Rajini. Sounds good.
> > > > >
> > > > > Ismael
> > > > >
> > > > > On Wed, Jan 10, 2018 at 11:41 AM, Rajini Sivaram <
> > > > rajinisivaram@gmail.com>
> > > > > wrote:
> > > > >
> > > > > > Hi Ismael,
> > > > > >
> > > > > > I have updated the KIP to use AES-256 if available and AES-128
> > > > otherwise
> > > > > > for password encryption. Looking at GCM, it looks like GCM is
> > > typically
> > > > > > used with a variable initialization vector, while we are using a
> > > > random,
> > > > > > but constant IV per-password. Also, AES/GCM is not supported by
> > > Java7.
> > > > > > Since the authentication and performance benefits of GCM are not
> > > > required
> > > > > > for this scenario, I am thinking I will leave the default as CBC,
> > but
> > > > > make
> > > > > > sure we test GCM as well so that users have the choice.
> > > > > >
> > > > > > On Wed, Jan 10, 2018 at 1:01 AM, Colin McCabe <
> cmccabe@apache.org>
> > > > > wrote:
> > > > > >
> > > > > > > Thanks, Rajini.  That makes sense.
> > > > > > >
> > > > > > > regards,
> > > > > > > Colin
> > > > > > >
> > > > > > > On Tue, Jan 9, 2018, at 14:38, Rajini Sivaram wrote:
> > > > > > > > Hi Colin,
> > > > > > > >
> > > > > > > > Thank you for reviewing.
> > > > > > > >
> > > > > > > > Yes, validation is done on the broker, not the client.
> > > > > > > >
> > > > > > > > All configs from ZooKeeper are processed and any config that
> > > could
> > > > > not
> > > > > > be
> > > > > > > > applied are logged as warnings. This includes any configs
> that
> > > are
> > > > > not
> > > > > > > > dynamic in the broker version or any configs that are not
> > > supported
> > > > > in
> > > > > > > the
> > > > > > > > broker version. If you downgrade to a version that is older
> > than
> > > > this
> > > > > > KIP
> > > > > > > > (1.0 for example), then you don't get any warnings however.
> > > > > > > >
> > > > > > > >
> > > > > > > > On Tue, Jan 9, 2018 at 9:38 PM, Colin McCabe <
> > cmccabe@apache.org
> > > >
> > > > > > wrote:
> > > > > > > >
> > > > > > > > > On Mon, Dec 18, 2017, at 13:40, Jason Gustafson wrote:
> > > > > > > > > > Hi Rajini,
> > > > > > > > > >
> > > > > > > > > > Looking good. Just a few questions.
> > > > > > > > > >
> > > > > > > > > > 1. (Related to Jay's comment) Is the validate() method on
> > > > > > > Reconfigurable
> > > > > > > > > > necessary? I would have thought we'd validate using the
> > > > > ConfigDef.
> > > > > > > Do you
> > > > > > > > > > have a use case in mind in which the reconfigurable
> > component
> > > > > only
> > > > > > > > > permits
> > > > > > > > > > certain reconfigurations?
> > > > > > > > >
> > > > > > > > > Hi,
> > > > > > > > >
> > > > > > > > > Sorry if this is a dumb question, but when we talk about
> > > > validating
> > > > > > on
> > > > > > > the
> > > > > > > > > ConfigDef, we're talking about validating on the server
> side,
> > > > > right?
> > > > > > > The
> > > > > > > > > software on the client side might be older or newer than
> the
> > > > > software
> > > > > > > on
> > > > > > > > > the broker side, so it seems inadvisable to do the
> validation
> > > > > there.
> > > > > > > > >
> > > > > > > > > Also, after a software downgrade, when the broker is
> > restarted,
> > > > it
> > > > > > > might
> > > > > > > > > find that there is a configuration key that is stored in ZK
> > > that
> > > > is
> > > > > > not
> > > > > > > > > dynamic in its (older) software version.  It seems like,
> with
> > > the
> > > > > > > current
> > > > > > > > > proposal, the broker will use the value found in the local
> > > > > > > configuration
> > > > > > > > > (config file) rather than the new ZK version.  Should the
> > > broker
> > > > > > print
> > > > > > > out
> > > > > > > > > a WARN message in that scenario?
> > > > > > > > >
> > > > > > > > > best,
> > > > > > > > > Colin
> > > > > > > > >
> > > > > > > > > > 2. Should Reconfigurable extend Configurable or is the
> > > initial
> > > > > > > > > > configuration also done through reconfigure()? I ask
> > because
> > > > not
> > > > > > all
> > > > > > > > > > plugins interfaces currently extend Configurable (e.g.
> > > > > > > > > > KafkaPrincipalBuilder).
> > > > > > > > > > 3. You mentioned a couple changes to
> DescribeConfigsOptions
> > > and
> > > > > > > > > > DescribeConfigsResult. Perhaps we should list the changes
> > > > > > > explicitly? One
> > > > > > > > > > not totally obvious case is what the synonyms() getter
> > would
> > > > > return
> > > > > > > if
> > > > > > > > > the
> > > > > > > > > > option is not specified (i.e. should it raise an
> exception
> > or
> > > > > > return
> > > > > > > an
> > > > > > > > > > empty list?).
> > > > > > > > > > 4. Config entries in the DescribeConfigs response have an
> > > > > > is_default
> > > > > > > > > flag.
> > > > > > > > > > Could that be replaced with the more general
> config_source?
> > > > > > > > > > 5. Bit of an internal question, but how do you handle
> > config
> > > > > > > > > dependencies?
> > > > > > > > > > For example, suppose I want to add a listener and
> configure
> > > its
> > > > > > > principal
> > > > > > > > > > builder at once. You'd have to validate the principal
> > builder
> > > > > > config
> > > > > > > in
> > > > > > > > > the
> > > > > > > > > > context of the listener config, so I guess the order of
> the
> > > > > entries
> > > > > > > in
> > > > > > > > > > AlterConfigs is significant?
> > > > > > > > > > 6. KIP-48 (delegation tokens) gives us a master secret
> > which
> > > is
> > > > > > > shared by
> > > > > > > > > > all brokers. Do you think we would make this dynamically
> > > > > > > configurable?
> > > > > > > > > > Alternatively, it might be possible to use it to encrypt
> > the
> > > > > other
> > > > > > > > > > passwords we store in zookeeper.
> > > > > > > > > >
> > > > > > > > > > Thanks,
> > > > > > > > > > Jason
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > On Mon, Dec 18, 2017 at 10:16 AM, Rajini Sivaram <
> > > > > > > > > rajinisivaram@gmail.com>
> > > > > > > > > > wrote:
> > > > > > > > > >
> > > > > > > > > > > Hi Jay,
> > > > > > > > > > >
> > > > > > > > > > > Thank you for reviewing the KIP.
> > > > > > > > > > >
> > > > > > > > > > > 1) Yes, makes sense. I will update the PR. There are
> some
> > > > > config
> > > > > > > > > updates
> > > > > > > > > > > that may be allowed depending on the context (e.g. some
> > > > > security
> > > > > > > > > configs
> > > > > > > > > > > can be updated for new listeners, but not existing
> > > > listeners).
> > > > > > > Perhaps
> > > > > > > > > it
> > > > > > > > > > > is ok to mark them dynamic in the documentation.
> > > AdminClient
> > > > > > would
> > > > > > > give
> > > > > > > > > > > appropriate error messages if the update is not
> allowed.
> > > > > > > > > > > 2) Internally, in the implementation, a mixture of
> direct
> > > > > config
> > > > > > > > > updates
> > > > > > > > > > > (e.g log config as you have pointed out) and
> reconfigure
> > > > method
> > > > > > > > > invocations
> > > > > > > > > > > (e.g. SslFactory) are used. For configurable plugins
> > (e.g.
> > > > > > metrics
> > > > > > > > > > > reporter), we require the Reconfigurable interface to
> > > ensure
> > > > > that
> > > > > > > we
> > > > > > > > > can
> > > > > > > > > > > validate any custom configs and avoid reconfiguration
> for
> > > > > plugin
> > > > > > > > > versions
> > > > > > > > > > > that don't support it.
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > On Mon, Dec 18, 2017 at 5:49 PM, Jay Kreps <
> > > jay@confluent.io
> > > > >
> > > > > > > wrote:
> > > > > > > > > > >
> > > > > > > > > > > > Two thoughts on implementation (shouldn't effect the
> > > KIP):
> > > > > > > > > > > >
> > > > > > > > > > > >    1. It might be nice to add a parameter to
> ConfigDef
> > > > which
> > > > > > says
> > > > > > > > > > > whether a
> > > > > > > > > > > >    configuration is dynamically updatable or not so
> > that
> > > we
> > > > > can
> > > > > > > give
> > > > > > > > > > > error
> > > > > > > > > > > >    messages if it isn't and also have it reflected in
> > the
> > > > > > > > > auto-generated
> > > > > > > > > > > > docs.
> > > > > > > > > > > >    2. For many systems they don't really need to take
> > > > action
> > > > > > if a
> > > > > > > > > config
> > > > > > > > > > > >    changes, they just need to use the new value.
> > Changing
> > > > > them
> > > > > > > all to
> > > > > > > > > > > >    Reconfigurable requires managing a fair amount of
> > > > > mutability
> > > > > > > in
> > > > > > > > > each
> > > > > > > > > > > > class
> > > > > > > > > > > >    that accepts changes. Some need this since they
> need
> > > to
> > > > > take
> > > > > > > > > actions
> > > > > > > > > > > > when a
> > > > > > > > > > > >    config changes, but it seems like many just need
> to
> > > > update
> > > > > > > some
> > > > > > > > > value.
> > > > > > > > > > > > For
> > > > > > > > > > > >    the later you might just be able to do something
> > like
> > > > what
> > > > > > we
> > > > > > > do
> > > > > > > > > for
> > > > > > > > > > > >    LogConfig where there is a single CurrentConfig
> > > instance
> > > > > > that
> > > > > > > has
> > > > > > > > > a
> > > > > > > > > > > >    reference to the current KafkaConfig and always
> > > > reference
> > > > > > your
> > > > > > > > > > > > configurable
> > > > > > > > > > > >    parameters via this (e.g.
> config.current.myConfig).
> > > > Dunno
> > > > > if
> > > > > > > that
> > > > > > > > > is
> > > > > > > > > > > >    actually better, but thought I'd throw it out
> there.
> > > > > > > > > > > >
> > > > > > > > > > > > -Jay
> > > > > > > > > > > >
> > > > > > > > > > > > On Sun, Dec 10, 2017 at 8:09 AM, Rajini Sivaram <
> > > > > > > > > rajinisivaram@gmail.com
> > > > > > > > > > > >
> > > > > > > > > > > > wrote:
> > > > > > > > > > > >
> > > > > > > > > > > > > Hi Jun,
> > > > > > > > > > > > >
> > > > > > > > > > > > > Thank you!
> > > > > > > > > > > > >
> > > > > > > > > > > > > 5. Yes, that makes sense. Agree that we don't want
> to
> > > add
> > > > > > > protocol
> > > > > > > > > > > > changes
> > > > > > > > > > > > > to *UpdateMetadataRequest* in this KIP. I have
> moved
> > > the
> > > > > > > update of
> > > > > > > > > > > > > *log.message.format.version* and
> > > *inter.broker.protocol.
> > > > > > > version*
> > > > > > > > > to
> > > > > > > > > > > > reduce
> > > > > > > > > > > > > restarts during upgrade to* Future Work*. We can do
> > > this
> > > > > in a
> > > > > > > > > follow-on
> > > > > > > > > > > > > KIP.
> > > > > > > > > > > > >
> > > > > > > > > > > > > I will wait for another day to see if there are any
> > > more
> > > > > > > comments
> > > > > > > > > and
> > > > > > > > > > > > start
> > > > > > > > > > > > > vote on Tuesday if there are no other concerns.
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > > > > > > On Sat, Dec 9, 2017 at 12:22 AM, Jun Rao <
> > > > jun@confluent.io
> > > > > >
> > > > > > > wrote:
> > > > > > > > > > > > >
> > > > > > > > > > > > > > Hi, Rajini,
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > Thanks for the reply. They all make sense.
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > 5. Got it. Note that currently, only live brokers
> > are
> > > > > > > registered
> > > > > > > > > in
> > > > > > > > > > > ZK.
> > > > > > > > > > > > > > Another thing is that I am not sure that we want
> > > every
> > > > > > > broker to
> > > > > > > > > read
> > > > > > > > > > > > all
> > > > > > > > > > > > > > broker registrations directly from ZK. It's
> > probably
> > > > > better
> > > > > > > to
> > > > > > > > > have
> > > > > > > > > > > the
> > > > > > > > > > > > > > controller propagate this information. That will
> > > > require
> > > > > > > > > changing the
> > > > > > > > > > > > > > UpdateMetadataRequest protocol though. So, I am
> not
> > > > sure
> > > > > if
> > > > > > > you
> > > > > > > > > want
> > > > > > > > > > > to
> > > > > > > > > > > > > do
> > > > > > > > > > > > > > that in the same KIP.
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > Jun
> > > > > > > > > > > > > >
> > > > > > > > > > > > > >
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > On Fri, Dec 8, 2017 at 6:07 AM, Rajini Sivaram <
> > > > > > > > > > > > rajinisivaram@gmail.com>
> > > > > > > > > > > > > > wrote:
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > > Hi Jun,
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > Thank you for the review.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 1. No, I am hoping to migrate partitions to new
> > > > > threads.
> > > > > > We
> > > > > > > > > just
> > > > > > > > > > > need
> > > > > > > > > > > > > to
> > > > > > > > > > > > > > > ensure they don't run concurrently.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 2. AdminClient has a validateOnly option for
> > > > > > AlterConfigs.
> > > > > > > Any
> > > > > > > > > > > > > exceptions
> > > > > > > > > > > > > > > or return value of false from
> > > Reconfigurable#validate
> > > > > > would
> > > > > > > > > fail
> > > > > > > > > > > the
> > > > > > > > > > > > > > > AlterConfigsRequest.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 3. Yes, we will support describe and alter of
> > > configs
> > > > > > with
> > > > > > > > > listener
> > > > > > > > > > > > > > prefix.
> > > > > > > > > > > > > > > We will not allow alterConfigs() of security
> > > configs
> > > > > > > without
> > > > > > > > > the
> > > > > > > > > > > > > listener
> > > > > > > > > > > > > > > prefix, since we need to prevent the whole
> > cluster
> > > > > being
> > > > > > > made
> > > > > > > > > > > > unusable.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 4. Thank you, will make a note of that.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 5. When we are upgrading (from 1.0 to 2.0 for
> > > > example),
> > > > > > my
> > > > > > > > > > > > > understanding
> > > > > > > > > > > > > > is
> > > > > > > > > > > > > > > that we set inter.broker.protocol.version=1.0,
> > do
> > > a
> > > > > > > rolling
> > > > > > > > > > > upgrade
> > > > > > > > > > > > of
> > > > > > > > > > > > > > the
> > > > > > > > > > > > > > > whole cluster and when all brokers are at 2.0,
> we
> > > do
> > > > > > > another
> > > > > > > > > > > rolling
> > > > > > > > > > > > > > > upgrade with inter.broker.protocol.version=
> 2.0.
> > > > > Jason's
> > > > > > > > > suggestion
> > > > > > > > > > > > was
> > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > avoid the second rolling upgrade by enabling
> > > dynamic
> > > > > > > update of
> > > > > > > > > > > > > > > inter.broker.protocol.version. To set
> > > > > > > > > > > inter.broker.protocol.version=
> > > > > > > > > > > > > 2.0
> > > > > > > > > > > > > > > dynamically, we need to verify not just that
> the
> > > > > current
> > > > > > > > > broker is
> > > > > > > > > > > on
> > > > > > > > > > > > > > > version 2.0, but that all brokers int the
> cluster
> > > are
> > > > > on
> > > > > > > > > version
> > > > > > > > > > > 2.0
> > > > > > > > > > > > (I
> > > > > > > > > > > > > > > thought that was the reason for the second
> > rolling
> > > > > > > upgrade).
> > > > > > > > > The
> > > > > > > > > > > > broker
> > > > > > > > > > > > > > > version in ZK would enable that verification
> > before
> > > > > > > performing
> > > > > > > > > the
> > > > > > > > > > > > > > update.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 6. The config source would be
> > > > > > STATIC_BROKER_CONFIG/DYNAMIC_
> > > > > > > > > > > > > > BROKER_CONFIG,
> > > > > > > > > > > > > > > the config name would be
> listener.name.listenerA.
> > > > > > configX.
> > > > > > > And
> > > > > > > > > > > > synonyms
> > > > > > > > > > > > > > > list
> > > > > > > > > > > > > > > in describeConfigs() would list
> > > > > listener.name.listenerA.
> > > > > > > > > configX
> > > > > > > > > > > as
> > > > > > > > > > > > > well
> > > > > > > > > > > > > > > as
> > > > > > > > > > > > > > > configX.
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > 7. I think `default` is an overused terminology
> > > > > already.
> > > > > > > When
> > > > > > > > > > > configs
> > > > > > > > > > > > > are
> > > > > > > > > > > > > > > described, they return a flag indicating if the
> > > value
> > > > > is
> > > > > > a
> > > > > > > > > default.
> > > > > > > > > > > > And
> > > > > > > > > > > > > > in
> > > > > > > > > > > > > > > the broker, we have so many levels of configs
> > > already
> > > > > and
> > > > > > > we
> > > > > > > > > are
> > > > > > > > > > > > adding
> > > > > > > > > > > > > > so
> > > > > > > > > > > > > > > many more, that it may be better to use a
> > different
> > > > > term.
> > > > > > > It
> > > > > > > > > > > doesn't
> > > > > > > > > > > > > have
> > > > > > > > > > > > > > > to be synonyms, but since we want to use the
> same
> > > > term
> > > > > > for
> > > > > > > > > topics
> > > > > > > > > > > and
> > > > > > > > > > > > > > > brokers and we have listener configs which
> > override
> > > > > > > > > non-prefixed
> > > > > > > > > > > > > security
> > > > > > > > > > > > > > > configs, perhaps it is ok?
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > Regards,
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > Rajini
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > On Wed, Dec 6, 2017 at 11:50 PM, Jun Rao <
> > > > > > jun@confluent.io
> > > > > > > >
> > > > > > > > > wrote:
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > A couple more things.
> > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > 6. For the SSL/SASL configurations with the
> > > > listener
> > > > > > > prefix,
> > > > > > > > > do
> > > > > > > > > > > we
> > > > > > > > > > > > > need
> > > > > > > > > > > > > > > > another level in config_source since it's
> > neither
> > > > > topic
> > > > > > > nor
> > > > > > > > > > > broker?
> > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > 7. For include_synonyms in DescribeConfigs,
> the
> > > > name
> > > > > > > makes
> > > > > > > > > sense
> > > > > > > > > > > > for
> > > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > topic level configs. Not sure if it makes
> sense
> > > for
> > > > > > other
> > > > > > > > > > > > > hierarchies.
> > > > > > > > > > > > > > > > Perhaps sth more generic like default will be
> > > > better?
> > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > Thanks,
> > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > Jun
> > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > On Wed, Dec 6, 2017 at 3:41 PM, Jun Rao <
> > > > > > > jun@confluent.io>
> > > > > > > > > > > wrote:
> > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > Hi, Rajini,
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > Thanks for the kip. Looks good overall. A
> few
> > > > > > comments
> > > > > > > > > below.
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > 1. "num.replica.fetchers: Affinity of
> > > partitions
> > > > to
> > > > > > > threads
> > > > > > > > > > > will
> > > > > > > > > > > > be
> > > > > > > > > > > > > > > > > preserved for ordering." Does that mean the
> > new
> > > > > > fetcher
> > > > > > > > > threads
> > > > > > > > > > > > > won't
> > > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > > used until new partitions are added? This
> may
> > > be
> > > > > > > limiting.
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > 2. I am wondering how the result from
> > > > > > > > > > > > reporter.validate(Map<String,
> > > > > > > > > > > > > > ?>
> > > > > > > > > > > > > > > > > configs) will be used. If it returns false,
> > do
> > > we
> > > > > > > return
> > > > > > > > > false
> > > > > > > > > > > to
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > admin
> > > > > > > > > > > > > > > > > client for the validation call, which will
> > > seem a
> > > > > bit
> > > > > > > > > weird?
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > 3. For the SSL and SASL configuration
> > changes,
> > > do
> > > > > we
> > > > > > > > > support
> > > > > > > > > > > > those
> > > > > > > > > > > > > > with
> > > > > > > > > > > > > > > > > the listener prefix (e.g.,
> > > > > external-ssl-lisener.ssl.
> > > > > > > > > > > > > > > keystore.location).
> > > > > > > > > > > > > > > > > If so, do we plan to include them in the
> > result
> > > > of
> > > > > > > > > > > > > describeConfigs()?
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > 4. "Updates to advertised.listeners will
> > > > > re-register
> > > > > > > the
> > > > > > > > > new
> > > > > > > > > > > > > listener
> > > > > > > > > > > > > > > in
> > > > > > > > > > > > > > > > > ZK". To support this, we will likely need
> > > > > additional
> > > > > > > logic
> > > > > > > > > in
> > > > > > > > > > > the
> > > > > > > > > > > > > > > > > controller such that the controller can
> > > broadcast
> > > > > the
> > > > > > > > > metadata
> > > > > > > > > > > > with
> > > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > new
> > > > > > > > > > > > > > > > > listeners to every broker.
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > 5. Including broker version in broker
> > > > registration
> > > > > in
> > > > > > > ZK.
> > > > > > > > > I am
> > > > > > > > > > > > not
> > > > > > > > > > > > > > sure
> > > > > > > > > > > > > > > > > the usage of that. Each broker knows its
> > > version.
> > > > > So,
> > > > > > > is
> > > > > > > > > that
> > > > > > > > > > > for
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > > controller?
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > Jun
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > On Tue, Dec 5, 2017 at 11:05 AM, Colin
> > McCabe <
> > > > > > > > > > > > cmccabe@apache.org>
> > > > > > > > > > > > > > > > wrote:
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > >> On Tue, Dec 5, 2017, at 06:01, Rajini
> > Sivaram
> > > > > wrote:
> > > > > > > > > > > > > > > > >> > Hi Colin,
> > > > > > > > > > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > KAFKA-5722 already has an owner, so I
> > didn't
> > > > > want
> > > > > > to
> > > > > > > > > confuse
> > > > > > > > > > > > the
> > > > > > > > > > > > > > two
> > > > > > > > > > > > > > > > >> > KIPs.  They can be done independently of
> > > each
> > > > > > > other. The
> > > > > > > > > > > goal
> > > > > > > > > > > > is
> > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > try
> > > > > > > > > > > > > > > > >> and
> > > > > > > > > > > > > > > > >> > validate every config to the minimum
> > > > validation
> > > > > > > already
> > > > > > > > > in
> > > > > > > > > > > the
> > > > > > > > > > > > > > > broker
> > > > > > > > > > > > > > > > >> for
> > > > > > > > > > > > > > > > >> > the static configs, but in some cases
> to a
> > > > more
> > > > > > > > > restrictive
> > > > > > > > > > > > > level.
> > > > > > > > > > > > > > > So
> > > > > > > > > > > > > > > > a
> > > > > > > > > > > > > > > > >> > typo like a file-not-found or
> > > class-not-found
> > > > > > would
> > > > > > > > > > > definitely
> > > > > > > > > > > > > > fail
> > > > > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > >> > AlterConfigs request (validation is
> > > performed
> > > > by
> > > > > > > > > > > AlterConfigs
> > > > > > > > > > > > > > > > regardless
> > > > > > > > > > > > > > > > >> > of validateOnly flag). I am working out
> > the
> > > > > > > additional
> > > > > > > > > > > > > validation
> > > > > > > > > > > > > > I
> > > > > > > > > > > > > > > > can
> > > > > > > > > > > > > > > > >> > perform as I implement updates for each
> > > > config.
> > > > > > For
> > > > > > > > > example,
> > > > > > > > > > > > > > > > >> > inter-broker keystore update will not be
> > > > allowed
> > > > > > > unless
> > > > > > > > > it
> > > > > > > > > > > can
> > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> > verified against the currently
> configured
> > > > > > > truststore.
> > > > > > > > > > > > > > > > >>
> > > > > > > > > > > > > > > > >> HI Rajini,
> > > > > > > > > > > > > > > > >>
> > > > > > > > > > > > > > > > >> I agree.  It's probably better to avoid
> > > > expanding
> > > > > > the
> > > > > > > > > scope of
> > > > > > > > > > > > > > > KIP-226.
> > > > > > > > > > > > > > > > >> I hope we can get to KAFKA-5722 soon,
> > though,
> > > > > since
> > > > > > it
> > > > > > > > > will
> > > > > > > > > > > > really
> > > > > > > > > > > > > > > > >> improve the user experience for this
> > feature.
> > > > > > > > > > > > > > > > >>
> > > > > > > > > > > > > > > > >> regards,
> > > > > > > > > > > > > > > > >> Colin
> > > > > > > > > > > > > > > > >>
> > > > > > > > > > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > On Sat, Dec 2, 2017 at 10:15 PM, Colin
> > > McCabe
> > > > <
> > > > > > > > > > > > > cmccabe@apache.org
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > >> wrote:
> > > > > > > > > > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > > On Tue, Nov 28, 2017, at 14:48, Rajini
> > > > Sivaram
> > > > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > Hi Colin,
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > Thank you for reviewing the KIP.
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > *kaka-configs.sh* will be converted
> to
> > > use
> > > > > > > > > *AdminClient*
> > > > > > > > > > > > > under
> > > > > > > > > > > > > > > > >> > > > KAFKA-5722.
> > > > > > > > > > > > > > > > >> > > > This is targeted for the next
> release
> > > > > (1.1.0).
> > > > > > > Under
> > > > > > > > > > > this
> > > > > > > > > > > > > KIP,
> > > > > > > > > > > > > > > we
> > > > > > > > > > > > > > > > >> will
> > > > > > > > > > > > > > > > >> > > > implement *AdminClient#alterConfigs*
> > for
> > > > the
> > > > > > > dynamic
> > > > > > > > > > > > configs
> > > > > > > > > > > > > > > > listed
> > > > > > > > > > > > > > > > >> in
> > > > > > > > > > > > > > > > >> > > > the KIP. This will include
> validation
> > of
> > > > the
> > > > > > > > > configs and
> > > > > > > > > > > > > will
> > > > > > > > > > > > > > > > return
> > > > > > > > > > > > > > > > >> > > > appropriate errors if configs are
> > > invalid.
> > > > > > > > > Integration
> > > > > > > > > > > > tests
> > > > > > > > > > > > > > > will
> > > > > > > > > > > > > > > > >> also be
> > > > > > > > > > > > > > > > >> > > > added using AdmnClient. Only the
> > actual
> > > > > > > conversion
> > > > > > > > > of
> > > > > > > > > > > > > > > > ConfigCommand
> > > > > > > > > > > > > > > > >> to
> > > > > > > > > > > > > > > > >> > > > use AdminClient will be left to be
> > done
> > > > > under
> > > > > > > > > > > KAFKA-5722.
> > > > > > > > > > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > Hi Rajini,
> > > > > > > > > > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > It seems like there is no KIP yet for
> > > > > > KAFKA-5722.
> > > > > > > > > Does it
> > > > > > > > > > > > > make
> > > > > > > > > > > > > > > > sense
> > > > > > > > > > > > > > > > >> to
> > > > > > > > > > > > > > > > >> > > describe the conversion of
> > > kafka-configs.sh
> > > > to
> > > > > > use
> > > > > > > > > > > > AdminClient
> > > > > > > > > > > > > > in
> > > > > > > > > > > > > > > > >> > > KIP-226?  Since the AlterConfigs RPCs
> > > > already
> > > > > > > exist,
> > > > > > > > > it
> > > > > > > > > > > > should
> > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> pretty
> > > > > > > > > > > > > > > > >> > > straightforward.  This would also let
> us
> > > add
> > > > > > some
> > > > > > > > > > > > information
> > > > > > > > > > > > > > > about
> > > > > > > > > > > > > > > > >> how
> > > > > > > > > > > > > > > > >> > > errors will be handled, which is
> pretty
> > > > > > important
> > > > > > > for
> > > > > > > > > > > users.
> > > > > > > > > > > > > > For
> > > > > > > > > > > > > > > > >> > > example, will kafka-configs.sh give an
> > > error
> > > > > if
> > > > > > > the
> > > > > > > > > user
> > > > > > > > > > > > > makes a
> > > > > > > > > > > > > > > > typo
> > > > > > > > > > > > > > > > >> > > when setting a configuration?
> > > > > > > > > > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > Once KAFKA-5722 is implemented,*
> > > > > > > kafka-confgs.sh*
> > > > > > > > > can be
> > > > > > > > > > > > > used
> > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> obtain
> > > > > > > > > > > > > > > > >> > > > the current configuration, which can
> > be
> > > > > > > redirected
> > > > > > > > > to a
> > > > > > > > > > > > text
> > > > > > > > > > > > > > > file
> > > > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> > > create a
> > > > > > > > > > > > > > > > >> > > > static *server.properties* file.
> This
> > > > should
> > > > > > > help
> > > > > > > > > when
> > > > > > > > > > > > > > > downgrading
> > > > > > > > > > > > > > > > >> - but
> > > > > > > > > > > > > > > > >> > > > it does require brokers to be
> running.
> > > We
> > > > > can
> > > > > > > also
> > > > > > > > > > > > document
> > > > > > > > > > > > > > how
> > > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> obtain
> > > > > > > > > > > > > > > > >> > > > the properties using
> > > *zookeeper-shell.sh*
> > > > > > while
> > > > > > > > > > > > downgrading
> > > > > > > > > > > > > if
> > > > > > > > > > > > > > > > >> brokers
> > > > > > > > > > > > > > > > >> > > are
> > > > > > > > > > > > > > > > >> > > > down.
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > If we rename properties, we should
> add
> > > the
> > > > > new
> > > > > > > > > property
> > > > > > > > > > > to
> > > > > > > > > > > > > ZK
> > > > > > > > > > > > > > > > based
> > > > > > > > > > > > > > > > >> on
> > > > > > > > > > > > > > > > >> > > > the value of the old property when
> the
> > > > > > upgraded
> > > > > > > > > broker
> > > > > > > > > > > > > starts
> > > > > > > > > > > > > > > up.
> > > > > > > > > > > > > > > > >> But we
> > > > > > > > > > > > > > > > >> > > > would probably leave the old
> property
> > as
> > > > is.
> > > > > > > The old
> > > > > > > > > > > > > property
> > > > > > > > > > > > > > > will
> > > > > > > > > > > > > > > > >> be
> > > > > > > > > > > > > > > > >> > > returned
> > > > > > > > > > > > > > > > >> > > > and used as a synonym only as long
> as
> > > the
> > > > > > > broker is
> > > > > > > > > on a
> > > > > > > > > > > > > > version
> > > > > > > > > > > > > > > > >> where it
> > > > > > > > > > > > > > > > >> > > > is still valid. But it can remain in
> > ZK
> > > > and
> > > > > be
> > > > > > > > > updated
> > > > > > > > > > > if
> > > > > > > > > > > > > > > > >> downgrading -
> > > > > > > > > > > > > > > > >> > > > it will be up to the user to update
> > the
> > > > old
> > > > > > > > > property if
> > > > > > > > > > > > > > > > downgrading
> > > > > > > > > > > > > > > > >> or
> > > > > > > > > > > > > > > > >> > > > delete it if not needed. Renaming
> > > > properties
> > > > > > is
> > > > > > > > > likely
> > > > > > > > > > > to
> > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> confusing
> > > > > > > > > > > > > > > > >> > > in any
> > > > > > > > > > > > > > > > >> > > > case even without dynamic configs,
> so
> > > > > > hopefully
> > > > > > > it
> > > > > > > > > will
> > > > > > > > > > > be
> > > > > > > > > > > > > > very
> > > > > > > > > > > > > > > > >> rare.
> > > > > > > > > > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > Sounds good.
> > > > > > > > > > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > best,
> > > > > > > > > > > > > > > > >> > > Colin
> > > > > > > > > > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > Rajini
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > On Tue, Nov 28, 2017 at 7:47 PM,
> Colin
> > > > > McCabe
> > > > > > <
> > > > > > > > > > > > > > > cmccabe@apache.org
> > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > >> > > wrote:
> > > > > > > > > > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > Hi Rajini,
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > This seems like a nice
> improvement!
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > One thing that is a bit concerning
> > is
> > > > > that,
> > > > > > if
> > > > > > > > > > > > > > > > >> bin/kafka-configs.sh is
> > > > > > > > > > > > > > > > >> > > > > used, there is no  way for the
> > broker
> > > to
> > > > > > give
> > > > > > > > > feedback
> > > > > > > > > > > > or
> > > > > > > > > > > > > > > error
> > > > > > > > > > > > > > > > >> > > > > messages.  The broker can't say
> > > "sorry,
> > > > I
> > > > > > > can't
> > > > > > > > > > > > > reconfigure
> > > > > > > > > > > > > > > that
> > > > > > > > > > > > > > > > >> in
> > > > > > > > > > > > > > > > >> > > that
> > > > > > > > > > > > > > > > >> > > > > way."  Or even "that configuration
> > > > > property
> > > > > > > is not
> > > > > > > > > > > > > > > > reconfigurable
> > > > > > > > > > > > > > > > >> in
> > > > > > > > > > > > > > > > >> > > > > this version of the software."  It
> > > seems
> > > > > > like
> > > > > > > in
> > > > > > > > > the
> > > > > > > > > > > > > > examples
> > > > > > > > > > > > > > > > >> give,
> > > > > > > > > > > > > > > > >> > > > > users will simply set a
> > configuration
> > > > > using
> > > > > > > > > > > > > > > > bin/kafka-configs.sh,
> > > > > > > > > > > > > > > > >> but
> > > > > > > > > > > > > > > > >> > > > > then they have to check the broker
> > log
> > > > > files
> > > > > > > to
> > > > > > > > > see if
> > > > > > > > > > > > it
> > > > > > > > > > > > > > > could
> > > > > > > > > > > > > > > > >> > > actually
> > > > > > > > > > > > > > > > >> > > > > be applied.  And even if it
> couldn't
> > > be
> > > > > > > applied,
> > > > > > > > > then
> > > > > > > > > > > it
> > > > > > > > > > > > > > still
> > > > > > > > > > > > > > > > >> lingers
> > > > > > > > > > > > > > > > >> > > > > in ZooKeeper.
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > This seems like it would lead to a
> > lot
> > > > of
> > > > > > user
> > > > > > > > > > > > confusion,
> > > > > > > > > > > > > > > since
> > > > > > > > > > > > > > > > >> they
> > > > > > > > > > > > > > > > >> > > get
> > > > > > > > > > > > > > > > >> > > > > no feedback when reconfiguring
> > > > something.
> > > > > > For
> > > > > > > > > > > example,
> > > > > > > > > > > > > > there
> > > > > > > > > > > > > > > > >> will be a
> > > > > > > > > > > > > > > > >> > > > > lot of scenarios where someone
> > finds a
> > > > > > > > > reconfiguration
> > > > > > > > > > > > > > command
> > > > > > > > > > > > > > > > on
> > > > > > > > > > > > > > > > >> > > > > Google, runs it, but then it
> doesn't
> > > do
> > > > > > > anything
> > > > > > > > > > > because
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > >> software
> > > > > > > > > > > > > > > > >> > > > > version is different.  And there's
> > no
> > > > > error
> > > > > > > > > message or
> > > > > > > > > > > > > > > feedback
> > > > > > > > > > > > > > > > >> about
> > > > > > > > > > > > > > > > >> > > > > this.  It just doesn't work.
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > To prevent this, I think we should
> > > > convert
> > > > > > > > > > > > > > > bin/kafka-configs.sh
> > > > > > > > > > > > > > > > >> to use
> > > > > > > > > > > > > > > > >> > > > > AdminClient's AlterConfigsRequest.
> > > This
> > > > > > > allows
> > > > > > > > > us to
> > > > > > > > > > > > > detect
> > > > > > > > > > > > > > > > >> scenarios
> > > > > > > > > > > > > > > > >> > > > > where, because of a typo,
> different
> > > > > software
> > > > > > > > > version,
> > > > > > > > > > > > or a
> > > > > > > > > > > > > > > value
> > > > > > > > > > > > > > > > >> of the
> > > > > > > > > > > > > > > > >> > > > > wrong type (eg. string vs. int),
> the
> > > > given
> > > > > > > > > > > configuration
> > > > > > > > > > > > > > > cannot
> > > > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> > > > > applied.  We really should convert
> > > > > > > > > kafka-configs.sh to
> > > > > > > > > > > > use
> > > > > > > > > > > > > > > > >> AdminClient
> > > > > > > > > > > > > > > > >> > > > > anyway, for all the usual
> reasons--
> > > > people
> > > > > > > want to
> > > > > > > > > > > lock
> > > > > > > > > > > > > down
> > > > > > > > > > > > > > > > >> ZooKeeper,
> > > > > > > > > > > > > > > > >> > > > > ACLs should be enforced, internal
> > > > > > > representations
> > > > > > > > > > > should
> > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> hidden, we
> > > > > > > > > > > > > > > > >> > > > > should support environments where
> ZK
> > > is
> > > > > not
> > > > > > > > > exposed,
> > > > > > > > > > > > etc.
> > > > > > > > > > > > > > etc.
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > Another issue that I see here is,
> > how
> > > > does
> > > > > > > this
> > > > > > > > > > > interact
> > > > > > > > > > > > > > with
> > > > > > > > > > > > > > > > >> > > downgrade?
> > > > > > > > > > > > > > > > >> > > > >  Presumably, if the user
> downgrades
> > > to a
> > > > > > > version
> > > > > > > > > that
> > > > > > > > > > > > > > doesn't
> > > > > > > > > > > > > > > > >> support
> > > > > > > > > > > > > > > > >> > > > > KIP-226, all the dynamic
> > > configurations
> > > > > > > stored in
> > > > > > > > > ZK
> > > > > > > > > > > > > revert
> > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> whatever
> > > > > > > > > > > > > > > > >> > > > > value they have in the local
> config
> > > > files.
> > > > > > > Do we
> > > > > > > > > need
> > > > > > > > > > > > to
> > > > > > > > > > > > > > > have a
> > > > > > > > > > > > > > > > >> > > utility
> > > > > > > > > > > > > > > > >> > > > > that can reify the actual applied
> > > > > > > configuration
> > > > > > > > > into a
> > > > > > > > > > > > > local
> > > > > > > > > > > > > > > > text
> > > > > > > > > > > > > > > > >> file,
> > > > > > > > > > > > > > > > >> > > > > to make downgrades less painful?
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > With regard to upgrades, what
> > happens
> > > if
> > > > > we
> > > > > > > > > change the
> > > > > > > > > > > > > name
> > > > > > > > > > > > > > > of a
> > > > > > > > > > > > > > > > >> > > > > configuration key in the future?
> > For
> > > > > > > example, if
> > > > > > > > > we
> > > > > > > > > > > > > decide
> > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> rename
> > > > > > > > > > > > > > > > >> > > > > min.insync.replicas to
> > > > > min.in.sync.replicas,
> > > > > > > > > > > presumably
> > > > > > > > > > > > we
> > > > > > > > > > > > > > > will
> > > > > > > > > > > > > > > > >> > > > > deprecate the old key name.  And
> > then
> > > > > > perhaps
> > > > > > > it
> > > > > > > > > will
> > > > > > > > > > > be
> > > > > > > > > > > > > > > removed
> > > > > > > > > > > > > > > > >> in a
> > > > > > > > > > > > > > > > >> > > > > future release, such as Apache
> Kafka
> > > > 2.0.
> > > > > > In
> > > > > > > this
> > > > > > > > > > > > > scenario,
> > > > > > > > > > > > > > > > >> should the
> > > > > > > > > > > > > > > > >> > > > > Kafka upgrade process change the
> > name
> > > of
> > > > > the
> > > > > > > > > > > > configuration
> > > > > > > > > > > > > > key
> > > > > > > > > > > > > > > > in
> > > > > > > > > > > > > > > > >> ZK
> > > > > > > > > > > > > > > > >> > > > > from min.insync.replicas to
> > > > > > > min.in.sync.replicas?
> > > > > > > > > > > > > Obviously
> > > > > > > > > > > > > > > > this
> > > > > > > > > > > > > > > > >> will
> > > > > > > > > > > > > > > > >> > > > > make downgrades harder, if so.
> But
> > if
> > > > it
> > > > > > > doesn't,
> > > > > > > > > > > then
> > > > > > > > > > > > > > > removing
> > > > > > > > > > > > > > > > >> > > > > deprecated configuration key
> > synonyms
> > > > > might
> > > > > > > become
> > > > > > > > > > > very
> > > > > > > > > > > > > > > > difficult.
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > best,
> > > > > > > > > > > > > > > > >> > > > > Colin
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > On Wed, Nov 22, 2017, at 12:52,
> > Rajini
> > > > > > Sivaram
> > > > > > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > > > Hi Tom,
> > > > > > > > > > > > > > > > >> > > > > >
> > > > > > > > > > > > > > > > >> > > > > > No, I am not proposing this as a
> > way
> > > > to
> > > > > > > > > configure
> > > > > > > > > > > > > > > replication
> > > > > > > > > > > > > > > > >> quotas.
> > > > > > > > > > > > > > > > >> > > > > > When
> > > > > > > > > > > > > > > > >> > > > > > you describe broker configs
> using
> > > > > > > AdminClient,
> > > > > > > > > you
> > > > > > > > > > > > will
> > > > > > > > > > > > > > see
> > > > > > > > > > > > > > > > all
> > > > > > > > > > > > > > > > >> the
> > > > > > > > > > > > > > > > >> > > > > > configs
> > > > > > > > > > > > > > > > >> > > > > > persisted in
> > > > /configs/brokers/<brokerId>
> > > > > > in
> > > > > > > > > > > ZooKeeper
> > > > > > > > > > > > > and
> > > > > > > > > > > > > > > this
> > > > > > > > > > > > > > > > >> > > includes
> > > > > > > > > > > > > > > > >> > > > > > leader.replication.throttled.
> > rate,
> > > > > > > > > > > > > follower.replication.
> > > > > > > > > > > > > > > > >> > > throttled.rate
> > > > > > > > > > > > > > > > >> > > > > > etc. But
> > > > > > > > > > > > > > > > >> > > > > > the broker configs that can be
> > > altered
> > > > > > using
> > > > > > > > > > > > AdminClient
> > > > > > > > > > > > > > as
> > > > > > > > > > > > > > > a
> > > > > > > > > > > > > > > > >> result
> > > > > > > > > > > > > > > > >> > > of
> > > > > > > > > > > > > > > > >> > > > > > this KIP are those explicitly
> > stated
> > > > in
> > > > > > the
> > > > > > > KIP
> > > > > > > > > > > (does
> > > > > > > > > > > > > not
> > > > > > > > > > > > > > > > >> include
> > > > > > > > > > > > > > > > >> > > any of
> > > > > > > > > > > > > > > > >> > > > > > the quota configs).
> > > > > > > > > > > > > > > > >> > > > > >
> > > > > > > > > > > > > > > > >> > > > > > Regards,
> > > > > > > > > > > > > > > > >> > > > > >
> > > > > > > > > > > > > > > > >> > > > > > Rajini
> > > > > > > > > > > > > > > > >> > > > > >
> > > > > > > > > > > > > > > > >> > > > > > On Wed, Nov 22, 2017 at 7:54 PM,
> > Tom
> > > > > > > Bentley <
> > > > > > > > > > > > > > > > >> t.j.bentley@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > Hi Rajini,
> > > > > > > > > > > > > > > > >> > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > Just to clarify, are you
> > proposing
> > > > > this
> > > > > > > as a
> > > > > > > > > way
> > > > > > > > > > > to
> > > > > > > > > > > > > > > > configure
> > > > > > > > > > > > > > > > >> > > > > interbroker
> > > > > > > > > > > > > > > > >> > > > > > > throttling/quotas? I don't
> think
> > > you
> > > > > > are,
> > > > > > > just
> > > > > > > > > > > > wanted
> > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > check
> > > > > > > > > > > > > > > > >> > > (since
> > > > > > > > > > > > > > > > >> > > > > > > KIP-179 proposes a different
> > > > mechanism
> > > > > > for
> > > > > > > > > setting
> > > > > > > > > > > > > them
> > > > > > > > > > > > > > > > which
> > > > > > > > > > > > > > > > >> > > supports
> > > > > > > > > > > > > > > > >> > > > > > > their automatic removal).
> > > > > > > > > > > > > > > > >> > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > Cheers,
> > > > > > > > > > > > > > > > >> > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > Tom
> > > > > > > > > > > > > > > > >> > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > On 22 November 2017 at 18:28,
> > > Rajini
> > > > > > > Sivaram <
> > > > > > > > > > > > > > > > >> > > rajinisivaram@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > I have made an update to the
> > KIP
> > > > to
> > > > > > > > > optionally
> > > > > > > > > > > > > return
> > > > > > > > > > > > > > > all
> > > > > > > > > > > > > > > > >> the
> > > > > > > > > > > > > > > > >> > > config
> > > > > > > > > > > > > > > > >> > > > > > > > synonyms in
> > > > > *DescribeConfigsResponse*.
> > > > > > > The
> > > > > > > > > > > > synonyms
> > > > > > > > > > > > > > are
> > > > > > > > > > > > > > > > >> returned
> > > > > > > > > > > > > > > > >> > > in
> > > > > > > > > > > > > > > > >> > > > > the
> > > > > > > > > > > > > > > > >> > > > > > > > order of precedence.
> > > > > > > AlterConfigsResponse
> > > > > > > > > will
> > > > > > > > > > > not
> > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> modified
> > > > > > > > > > > > > > > > >> > > by the
> > > > > > > > > > > > > > > > >> > > > > > > KIP.
> > > > > > > > > > > > > > > > >> > > > > > > > Since many configs already
> > have
> > > > > > various
> > > > > > > > > > > overrides
> > > > > > > > > > > > > > (e.g.
> > > > > > > > > > > > > > > > >> topic
> > > > > > > > > > > > > > > > >> > > configs
> > > > > > > > > > > > > > > > >> > > > > > > with
> > > > > > > > > > > > > > > > >> > > > > > > > broker overrides, security
> > > > > properties
> > > > > > > with
> > > > > > > > > > > > listener
> > > > > > > > > > > > > > name
> > > > > > > > > > > > > > > > >> > > overrides)
> > > > > > > > > > > > > > > > >> > > > > and
> > > > > > > > > > > > > > > > >> > > > > > > we
> > > > > > > > > > > > > > > > >> > > > > > > > will be adding more levels
> > with
> > > > > > dynamic
> > > > > > > > > configs,
> > > > > > > > > > > > it
> > > > > > > > > > > > > > will
> > > > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> > > useful to
> > > > > > > > > > > > > > > > >> > > > > > > > obtain the full list in
> order
> > of
> > > > > > > precedence.
> > > > > > > > > > > > > > > > >> > > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > On Tue, Nov 21, 2017 at
> 11:24
> > > AM,
> > > > > > Rajini
> > > > > > > > > > > Sivaram <
> > > > > > > > > > > > > > > > >> > > > > > > rajinisivaram@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > > Hi Ted,
> > > > > > > > > > > > > > > > >> > > > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > > You can quote the config
> > name,
> > > > but
> > > > > > it
> > > > > > > is
> > > > > > > > > not
> > > > > > > > > > > > > > necessary
> > > > > > > > > > > > > > > > for
> > > > > > > > > > > > > > > > >> > > > > deleting a
> > > > > > > > > > > > > > > > >> > > > > > > > > config since the name
> > doesn't
> > > > > > contain
> > > > > > > any
> > > > > > > > > > > > special
> > > > > > > > > > > > > > > > >> characters
> > > > > > > > > > > > > > > > >> > > that
> > > > > > > > > > > > > > > > >> > > > > > > > requires
> > > > > > > > > > > > > > > > >> > > > > > > > > quoting.
> > > > > > > > > > > > > > > > >> > > > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > > On Mon, Nov 20, 2017 at
> 9:20
> > > PM,
> > > > > Ted
> > > > > > > Yu <
> > > > > > > > > > > > > > > > >> yuzhihong@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > > > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> Thanks for the quick
> > > response.
> > > > > > > > > > > > > > > > >> > > > > > > > >>
> > > > > > > > > > > > > > > > >> > > > > > > > >> It seems the config
> > following
> > > > > > > > > --delete-config
> > > > > > > > > > > > > > should
> > > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> > > quoted.
> > > > > > > > > > > > > > > > >> > > > > > > > >>
> > > > > > > > > > > > > > > > >> > > > > > > > >> Cheers
> > > > > > > > > > > > > > > > >> > > > > > > > >>
> > > > > > > > > > > > > > > > >> > > > > > > > >> On Mon, Nov 20, 2017 at
> > 12:02
> > > > PM,
> > > > > > > Rajini
> > > > > > > > > > > > Sivaram
> > > > > > > > > > > > > <
> > > > > > > > > > > > > > > > >> > > > > > > > rajinisivaram@gmail.com
> > > > > > > > > > > > > > > > >> > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > > > > > > > >> wrote:
> > > > > > > > > > > > > > > > >> > > > > > > > >>
> > > > > > > > > > > > > > > > >> > > > > > > > >> > Ted,
> > > > > > > > > > > > > > > > >> > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > Have added an example
> for
> > > > > > > > > --delete-config.
> > > > > > > > > > > > > > > > >> > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > On Mon, Nov 20, 2017 at
> > > 7:42
> > > > > PM,
> > > > > > > Ted
> > > > > > > > > Yu <
> > > > > > > > > > > > > > > > >> > > yuzhihong@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > > > wrote:
> > > > > > > > > > > > > > > > >> > > > > > > > >> >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > bq. There is a
> > > > > --delete-config
> > > > > > > option
> > > > > > > > > > > > > > > > >> > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > Consider adding a
> > sample
> > > > with
> > > > > > the
> > > > > > > > > above
> > > > > > > > > > > > > option
> > > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> the KIP.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > Thanks
> > > > > > > > > > > > > > > > >> > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > On Mon, Nov 20, 2017
> at
> > > > 11:36
> > > > > > AM,
> > > > > > > > > Rajini
> > > > > > > > > > > > > > Sivaram
> > > > > > > > > > > > > > > <
> > > > > > > > > > > > > > > > >> > > > > > > > >> >
> rajinisivaram@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > wrote:
> > > > > > > > > > > > > > > > >> > > > > > > > >> > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > Hi Ted,
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > Thank you for
> > reviewing
> > > > the
> > > > > > > KIP.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > *Would decreasing
> > > > > network/IO
> > > > > > > > > threads be
> > > > > > > > > > > > > > > supported
> > > > > > > > > > > > > > > > >> ?*
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > Yes, As described
> in
> > > the
> > > > > KIP,
> > > > > > > some
> > > > > > > > > > > > > > connections
> > > > > > > > > > > > > > > > >> will be
> > > > > > > > > > > > > > > > >> > > > > closed if
> > > > > > > > > > > > > > > > >> > > > > > > > >> > network
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > thread count is
> > reduced
> > > > > (and
> > > > > > > > > > > > reconnections
> > > > > > > > > > > > > > will
> > > > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> > > > > processed on
> > > > > > > > > > > > > > > > >> > > > > > > > >> > remaining
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > threads)
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > *What if some keys
> in
> > > > > configs
> > > > > > > are
> > > > > > > > > not
> > > > > > > > > > > in
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > Set
> > > > > > > > > > > > > > > > >> > > returned
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > by
> > > > reconfigurableConfigs()?
> > > > > > > Would
> > > > > > > > > > > > exception
> > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> thrown ?*
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > No,
> > > > > *reconfigurableConfigs()
> > > > > > > *will
> > > > > > > > > be
> > > > > > > > > > > > used
> > > > > > > > > > > > > to
> > > > > > > > > > > > > > > > >> decide
> > > > > > > > > > > > > > > > >> > > which
> > > > > > > > > > > > > > > > >> > > > > > > classes
> > > > > > > > > > > > > > > > >> > > > > > > > >> are
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > notified when a
> > > > > configuration
> > > > > > > > > update is
> > > > > > > > > > > > > > made*.
> > > > > > > > > > > > > > > > >> > > > > > > > >> >
> **reconfigure(Map<String,
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > ?>
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > configs)* will be
> > > invoked
> > > > > > with
> > > > > > > all
> > > > > > > > > of
> > > > > > > > > > > the
> > > > > > > > > > > > > > > > >> configured
> > > > > > > > > > > > > > > > >> > > > > configs of
> > > > > > > > > > > > > > > > >> > > > > > > > the
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > broker,
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >  similar to
> > > > > > > > > *configure(Map<String, ?>
> > > > > > > > > > > > > > > configs).
> > > > > > > > > > > > > > > > >> *For
> > > > > > > > > > > > > > > > >> > > > > example,
> > > > > > > > > > > > > > > > >> > > > > > > > when
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > *SslChannelBuilder*
> > is
> > > > made
> > > > > > > > > > > > reconfigurable,
> > > > > > > > > > > > > > it
> > > > > > > > > > > > > > > > >> could
> > > > > > > > > > > > > > > > >> > > just
> > > > > > > > > > > > > > > > >> > > > > > > create a
> > > > > > > > > > > > > > > > >> > > > > > > > >> new
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > SslFactory with the
> > > > latest
> > > > > > > configs,
> > > > > > > > > > > using
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > > same
> > > > > > > > > > > > > > > > >> code
> > > > > > > > > > > > > > > > >> > > as
> > > > > > > > > > > > > > > > >> > > > > > > > >> > *configure()*.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > We avoid
> > reconfiguring
> > > > > > > > > > > *SslChannelBuilder
> > > > > > > > > > > > > > > > >> > > *unnecessarily*,
> > > > > > > > > > > > > > > > >> > > > > *for
> > > > > > > > > > > > > > > > >> > > > > > > > >> example
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > if
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > a topic config has
> > > > changed,
> > > > > > > since
> > > > > > > > > topic
> > > > > > > > > > > > > > configs
> > > > > > > > > > > > > > > > >> are not
> > > > > > > > > > > > > > > > >> > > > > listed
> > > > > > > > > > > > > > > > >> > > > > > > in
> > > > > > > > > > > > > > > > >> > > > > > > > >> the
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> *SslChannelBuilder#**
> > > > > > > > > > > > > > reconfigurableConfigs().*
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > *The sample
> commands
> > > for
> > > > > > > > > > > > bin/kafka-configs
> > > > > > > > > > > > > > > > include
> > > > > > > > > > > > > > > > >> > > > > > > '--add-config'.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > Would
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > there be
> > > > '--remove-config'
> > > > > ?*
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> bin/kafka-configs.sh
> > is
> > > > an
> > > > > > > existing
> > > > > > > > > > > tool
> > > > > > > > > > > > > > whose
> > > > > > > > > > > > > > > > >> > > parameters
> > > > > > > > > > > > > > > > >> > > > > will
> > > > > > > > > > > > > > > > >> > > > > > > not
> > > > > > > > > > > > > > > > >> > > > > > > > >> be
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > modified by this
> KIP.
> > > > There
> > > > > > is
> > > > > > > a
> > > > > > > > > > > > > > > --delete-config
> > > > > > > > > > > > > > > > >> option.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > *ssl.keystore.password
> > > > > > appears
> > > > > > > a
> > > > > > > > > few
> > > > > > > > > > > > lines
> > > > > > > > > > > > > > > above.
> > > > > > > > > > > > > > > > >> Would
> > > > > > > > > > > > > > > > >> > > > > there be
> > > > > > > > > > > > > > > > >> > > > > > > > any
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > issue with mixture
> of
> > > > > > > connections
> > > > > > > > > (with
> > > > > > > > > > > > old
> > > > > > > > > > > > > > and
> > > > > > > > > > > > > > > > new
> > > > > > > > > > > > > > > > >> > > > > password) ?*
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > No, passwords (and
> > the
> > > > > actual
> > > > > > > > > keystore)
> > > > > > > > > > > > are
> > > > > > > > > > > > > > > only
> > > > > > > > > > > > > > > > >> used
> > > > > > > > > > > > > > > > >> > > during
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > authentication. Any
> > > > channel
> > > > > > > created
> > > > > > > > > > > using
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > old
> > > > > > > > > > > > > > > > >> > > SslFactory
> > > > > > > > > > > > > > > > >> > > > > > > will
> > > > > > > > > > > > > > > > >> > > > > > > > >> not
> > > > > > > > > > > > > > > > >> > > > > > > > >> > be
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > impacted.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > Regards,
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > Rajini
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > On Mon, Nov 20,
> 2017
> > at
> > > > > 4:39
> > > > > > > PM,
> > > > > > > > > Ted
> > > > > > > > > > > Yu <
> > > > > > > > > > > > > > > > >> > > > > yuzhihong@gmail.com>
> > > > > > > > > > > > > > > > >> > > > > > > > >> wrote:
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > bq. (e.g.
> increase
> > > > > > network/IO
> > > > > > > > > > > threads)
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > Would decreasing
> > > > > network/IO
> > > > > > > > > threads
> > > > > > > > > > > be
> > > > > > > > > > > > > > > > supported
> > > > > > > > > > > > > > > > >> ?
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > bq.     void
> > > > > > > > > reconfigure(Map<String,
> > > > > > > > > > > ?>
> > > > > > > > > > > > > > > > configs);
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > What if some keys
> > in
> > > > > > configs
> > > > > > > are
> > > > > > > > > not
> > > > > > > > > > > in
> > > > > > > > > > > > > the
> > > > > > > > > > > > > > > Set
> > > > > > > > > > > > > > > > >> > > returned
> > > > > > > > > > > > > > > > >> > > > > by
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > >
> > > reconfigurableConfigs()
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > ? Would exception
> > be
> > > > > > thrown ?
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > If so, please
> > specify
> > > > > which
> > > > > > > > > exception
> > > > > > > > > > > > > would
> > > > > > > > > > > > > > > be
> > > > > > > > > > > > > > > > >> thrown.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > The sample
> commands
> > > for
> > > > > > > > > > > > bin/kafka-configs
> > > > > > > > > > > > > > > > include
> > > > > > > > > > > > > > > > >> > > > > > > > '--add-config'.
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > Would there be
> > > > > > > '--remove-config'
> > > > > > > > > ?
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > >
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > bq. Existing
> > > > connections
> > > > > > will
> > > > > > > > > not be
> > > > > > > > > > > > > > > affected,
> > > > > > > > > > > > > > > > >> new
> > > > > > > > > > > > > > > > >> > > > > connections
> > > > > > > > > > > > > > > > >> > > > > > > > >> will
> > > > > > > > > > > > > > > > >> > > > > > > > >> > use
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > the
> > > > > > > > > > > > > > > > >> > > > > > > > >> > > > > new keystore.
> > > > > > > > > > > > > > > > >> > > > > > >
> > > >
> > > ...
> > >
> > > [Message clipped]  View entire message
> > > <?ui=2&ik=aa3c277f2b&view=lg&msg=16126bcb5fdb6a0c>
> > >
> >
>

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