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From Flavio Junqueira <...@apache.org>
Subject Re: ZK read-only issue
Date Sat, 30 Jul 2016 09:29:20 GMT
We don't seem to have proper documentation for a case like this with read-only, perhaps you'd
be willing to write something down so that we can include in our documentation, Benjamin?


We should in any case update the documentation with session states that aren't reflected there,
for example, SaslConnected is also not reflected. 

-Flavio

> On 29 Jul 2016, at 22:52, Benjamin Jaton <benjamin.jaton@gmail.com> wrote:
> 
> I was not using for the watcher to give me a ConnectedReadOnly event to
> start using the ZooKeeper client, my bad.
> When I use it it never fails.
> 
> Thanks you for your time, sorry for my mixup.
> Ben
> 
> On Fri, Jul 29, 2016 at 2:29 PM, Camille Fournier <camille@apache.org>
> wrote:
> 
>> Just to clarify one thing though in the server logs from the fresh install
>> is the new read only server reporting anything?
>> 
>> On Jul 29, 2016 5:26 PM, "Camille Fournier" <camille@apache.org> wrote:
>> 
>>> Sorry again I'm having reading issues ignore that comment as I see flavio
>>> already answered it
>>> 
>>> On Jul 29, 2016 5:25 PM, "Camille Fournier" <camille@apache.org> wrote:
>>> 
>>>> Update,  I was confused by races of my own doing. Was this client
>>>> previously connected when it failed the read only check? The server log
>> is
>>>> rejecting it because the client is ahead in zxid in the first set of
>> logs.
>>>> The other two servers are totally down and it's a new client when you
>> see
>>>> this issue?
>>>> 
>>>> On Jul 29, 2016 3:07 PM, "Camille Fournier" <camille@apache.org> wrote:
>>>> 
>>>>> Ok yeah I think this is reproducible and a bug in the client connection
>>>>> read-only logic.
>>>>> 
>>>>> On Fri, Jul 29, 2016 at 2:43 PM, Camille Fournier <camille@apache.org>
>>>>> wrote:
>>>>> 
>>>>>> I'm looking at the readonly mode code right now and it appears that
>> the
>>>>>> only way to set readonly mode is a global system property which means
>> that
>>>>>> the tests for this are only testing across 3 servers, all of which
>> have
>>>>>> readonly mode set. So, this MAY be a bug, but what a pain to figure
>> out how
>>>>>> to reproduce.
>>>>>> 
>>>>>> Global system properties: not even once.
>>>>>> 
>>>>>> On Fri, Jul 29, 2016 at 12:27 PM, Flavio Junqueira <fpj@apache.org>
>>>>>> wrote:
>>>>>> 
>>>>>>> Not that I'm aware of...
>>>>>>> 
>>>>>>> -Flavio
>>>>>>> 
>>>>>>>> On 29 Jul 2016, at 17:24, Benjamin Jaton <benjamin.jaton@gmail.com
>>> 
>>>>>>> wrote:
>>>>>>>> 
>>>>>>>> Hi Flavio,
>>>>>>>> 
>>>>>>>> The bug / patch is only for the C client, does this issue
affect
>> the
>>>>>>> java
>>>>>>>> client as well?
>>>>>>>> 
>>>>>>>> On Thu, Jul 28, 2016 at 5:01 PM, Benjamin Jaton <
>>>>>>> benjamin.jaton@gmail.com>
>>>>>>>> wrote:
>>>>>>>> 
>>>>>>>>> I will definitely try and I'll post an update, thanks
again
>> Flavio.
>>>>>>>>> 
>>>>>>>>> On Thu, Jul 28, 2016 at 4:59 PM, Flavio Junqueira <fpj@apache.org
>>> 
>>>>>>> wrote:
>>>>>>>>> 
>>>>>>>>>> I think you're hitting this:
>>>>>>>>>> 
>>>>>>>>>> https://issues.apache.org/jira/browse/ZOOKEEPER-2466
<
>>>>>>>>>> https://issues.apache.org/jira/browse/ZOOKEEPER-2466>
>>>>>>>>>> 
>>>>>>>>>> which is resolved for 3.5.3 and trunk. You can try
out the patch.
>>>>>>>>>> 
>>>>>>>>>> -Flavio
>>>>>>>>>> 
>>>>>>>>>>> On 29 Jul 2016, at 00:56, Benjamin Jaton <
>>>>>>> benjamin.jaton@gmail.com>
>>>>>>>>>> wrote:
>>>>>>>>>>> 
>>>>>>>>>>> OK so I did another fresh install this time using
3.5.2-alpha,
>>>>>>> and the
>>>>>>>>>> read
>>>>>>>>>>> only client doesn't seem to try all the hosts
available.
>>>>>>>>>>> 
>>>>>>>>>>> I create my client with:
>>>>>>>>>>> ZooKeeper zk = new ZooKeeper("10.11.9.70:2181,10.11.12.4:2181,
>>>>>>>>>>> 10.11.12.210:2181", 45000, this, true);
>>>>>>>>>>> 
>>>>>>>>>>> In the following output, it only checks for 10.11.12.4:2181
and
>>>>>>>>>>> 10.11.12.210:2181, but it doesn't try 10.11.9.70:2181
which is
>>>>>>> where
>>>>>>>>>> the
>>>>>>>>>>> running server is.
>>>>>>>>>>> 
>>>>>>>>>>> 0 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:zookeeper.version=3.5.2-alpha-1753710,
built on
>>>>>>> 07/21/2016
>>>>>>>>>>> 16:24 GMT
>>>>>>>>>>> 1 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>> environment:
>>>>>>>>>> host.name
>>>>>>>>>>> =w-rli09-ben
>>>>>>>>>>> 1 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:java.version=1.8.0_11
>>>>>>>>>>> 1 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:java.vendor=Oracle Corporation
>>>>>>>>>>> 1 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:java.home=/usr/local/apps/jdk1.8.0_11/jre
>>>>>>>>>>> 1 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> environment:java.class.path=/home/benji/workspace-trunk/testzkclient/bin:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/commons-cli-1.2.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jackson-core-asl-1.9.11.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jackson-mapper-asl-1.9.11.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/javacc.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jetty-6.1.26.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jetty-util-6.1.26.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jline-2.11.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/log4j-1.2.17.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/netty-3.10.5.Final.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/servlet-api-2.5-20081211.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/slf4j-api-1.7.5.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/slf4j-log4j12-1.7.5.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/zookeeper-3.5.2-alpha.jar
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:java.io.tmpdir=/tmp
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:java.compiler=<NA>
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>> environment:
>>>>>>>>>> os.name
>>>>>>>>>>> =Linux
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:os.arch=amd64
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:os.version=3.8.0-44-generic
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>> environment:
>>>>>>>>>> user.name
>>>>>>>>>>> =benji
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:user.home=/home/benji
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:user.dir=/home/benji/workspace-trunk/testzkclient
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:os.memory.free=376MB
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:os.memory.max=5358MB
>>>>>>>>>>> 2 [main] INFO org.apache.zookeeper.ZooKeeper
 - Client
>>>>>>>>>>> environment:os.memory.total=378MB
>>>>>>>>>>> *8 [main] INFO org.apache.zookeeper.ZooKeeper
 - Initiating
>> client
>>>>>>>>>>> connection, connectString=10.11.9.70:2181
>>>>>>>>>>> <http://10.11.9.70:2181>,10.11.12.4:2181
>>>>>>>>>>> <http://10.11.12.4:2181>,10.11.12.210:2181
<
>>>>>>> http://10.11.12.210:2181>
>>>>>>>>>>> sessionTimeout=45000
>>>>>>> watcher=testzkclient.TestZkReadOnlyClient@5010be6*
>>>>>>>>>>> 21 [main] DEBUG org.apache.zookeeper.ClientCnxnSocket
 -
>>>>>>> jute.maxbuffer
>>>>>>>>>> is
>>>>>>>>>>> 4194304
>>>>>>>>>>> Successfully established the connection with
ZooKeeper
>>>>>>>>>>> *37 [main-SendThread(10.11.12.4:2181 <http://10.11.12.4:2181>)]
>>>>>>> INFO
>>>>>>>>>>> org.apache.zookeeper.ClientCnxn  - Opening socket
connection to
>>>>>>> server
>>>>>>>>>>> 10.11.12.4/10.11.12.4:2181 <http://10.11.12.4/10.11.12.4:2181>.
>>>>>>> Will
>>>>>>>>>> not
>>>>>>>>>>> attempt to authenticate using SASL (unknown error)*
>>>>>>>>>>> 43 [main-SendThread(10.11.12.4:2181)] WARN
>>>>>>>>>> org.apache.zookeeper.ClientCnxn
>>>>>>>>>>> - Session 0x0 for server null, unexpected error,
closing socket
>>>>>>>>>> connection
>>>>>>>>>>> and attempting reconnect
>>>>>>>>>>> java.net.ConnectException: Connection refused
>>>>>>>>>>>  at sun.nio.ch.SocketChannelImpl.checkConnect(Native
Method)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:712)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214)
>>>>>>>>>>> 45 [main-SendThread(10.11.12.4:2181)] DEBUG
>>>>>>>>>>> org.apache.zookeeper.ClientCnxnSocketNIO  - Ignoring
exception
>>>>>>> during
>>>>>>>>>>> shutdown input
>>>>>>>>>>> java.nio.channels.ClosedChannelException
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:775)
>>>>>>>>>>>  at
>>>>>>> sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:402)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:198)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245)
>>>>>>>>>>> 45 [main-SendThread(10.11.12.4:2181)] DEBUG
>>>>>>>>>>> org.apache.zookeeper.ClientCnxnSocketNIO  - Ignoring
exception
>>>>>>> during
>>>>>>>>>>> shutdown output
>>>>>>>>>>> java.nio.channels.ClosedChannelException
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:792)
>>>>>>>>>>>  at
>>>>>>> sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:410)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:205)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245)
>>>>>>>>>>> *149 [main-SendThread(10.11.12.210:2181 <
>> http://10.11.12.210:2181
>>>>>>>> )]
>>>>>>>>>> INFO
>>>>>>>>>>> org.apache.zookeeper.ClientCnxn  - Opening socket
connection to
>>>>>>> server
>>>>>>>>>>> 10.11.12.210/10.11.12.210:2181 <
>>>>>>> http://10.11.12.210/10.11.12.210:2181>.
>>>>>>>>>>> Will not attempt to authenticate using SASL (unknown
error)*
>>>>>>>>>>> 150 [main-SendThread(10.11.12.210:2181)] WARN
>>>>>>>>>>> org.apache.zookeeper.ClientCnxn  - Session 0x0
for server null,
>>>>>>>>>> unexpected
>>>>>>>>>>> error, closing socket connection and attempting
reconnect
>>>>>>>>>>> java.net.ConnectException: Connection refused
>>>>>>>>>>>  at sun.nio.ch.SocketChannelImpl.checkConnect(Native
Method)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:712)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214)
>>>>>>>>>>> 150 [main-SendThread(10.11.12.210:2181)] DEBUG
>>>>>>>>>>> org.apache.zookeeper.ClientCnxnSocketNIO  - Ignoring
exception
>>>>>>> during
>>>>>>>>>>> shutdown input
>>>>>>>>>>> java.nio.channels.ClosedChannelException
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:775)
>>>>>>>>>>>  at
>>>>>>> sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:402)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:198)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245)
>>>>>>>>>>> 150 [main-SendThread(10.11.12.210:2181)] DEBUG
>>>>>>>>>>> org.apache.zookeeper.ClientCnxnSocketNIO  - Ignoring
exception
>>>>>>> during
>>>>>>>>>>> shutdown output
>>>>>>>>>>> java.nio.channels.ClosedChannelException
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:792)
>>>>>>>>>>>  at
>>>>>>> sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:410)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:205)
>>>>>>>>>>>  at
>>>>>>>>>>> 
>>>>>>> 
>> org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245)
>>>>>>>>>>> *Exception in thread "main"
>>>>>>>>>>> org.apache.zookeeper.KeeperException$ConnectionLossException:
>>>>>>>>>>> KeeperErrorCode = ConnectionLoss for /*
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
>>>>>>>>>>>  at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1956)
>>>>>>>>>>>  at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1985)
>>>>>>>>>>>  at
>>>>>>>>>> 
>> testzkclient.TestZkReadOnlyClient.run(TestZkReadOnlyClient.java:26)
>>>>>>>>>>>  at
>>>>>>>>>> 
>>>>>>> testzkclient.TestZkReadOnlyClient.main(TestZkReadOnlyClient.java:13)
>>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>> Does anybody else have issues with the readonly
mode?
>>>>>>>>>>> 
>>>>>>>>>>> Thanks
>>>>>>>>>>> Benjamin
>>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>> On Sat, Jul 16, 2016 at 7:39 PM, Benjamin Jaton
<
>>>>>>>>>> benjamin.jaton@gmail.com>
>>>>>>>>>>> wrote:
>>>>>>>>>>> 
>>>>>>>>>>>> Very interesting, thank you Flavio.
>>>>>>>>>>>> 
>>>>>>>>>>>> That should not happen because I have actually
never started
>>>>>>> (even
>>>>>>>>>> never
>>>>>>>>>>>> created) the other servers. This server is
the first one the
>>>>>>> client
>>>>>>>>>> could
>>>>>>>>>>>> have possibly ever seen. Maybe the server
has to have been in a
>>>>>>>>>> functioning
>>>>>>>>>>>> ensemble at least once before being able
to be read only able?
>>>>>>>>>>>> I will recheck all my setup and do it again.
>>>>>>>>>>>> Thanks again,
>>>>>>>>>>>> Ben
>>>>>>>>>>>> 
>>>>>>>>>>>> On Wed, Jul 13, 2016 at 2:06 PM, Flavio Junqueira
<
>>>>>>> fpj@apache.org>
>>>>>>>>>> wrote:
>>>>>>>>>>>> 
>>>>>>>>>>>>> From the logs, it looks like the server
the client is trying
>> to
>>>>>>>>>> connect
>>>>>>>>>>>>> to is behind compared to last zxid the
client has seen:
>>>>>>>>>>>>> 
>>>>>>>>>>>>>      Refusing session request for client
/10.11.12.4:49237
>> as
>>>>>>> it
>>>>>>>>>> has
>>>>>>>>>>>>> seen zxid 0x3 our last zxid is 0x0 client
must try another
>>>>>>> server
>>>>>>>>>>>>> 
>>>>>>>>>>>>> I believe the behavior we currently have
is that a client can
>>>>>>> connect
>>>>>>>>>> to
>>>>>>>>>>>>> an RO server, but the server must have
a view at least as
>>>>>>> recent as
>>>>>>>>>> the
>>>>>>>>>>>>> server.
>>>>>>>>>>>>> 
>>>>>>>>>>>>> -Flavio
>>>>>>>>>>>>> 
>>>>>>>>>>>>>> On 12 Jul 2016, at 16:23, Benjamin
Jaton <
>>>>>>> benjamin.jaton@gmail.com>
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> I'm having problems using ZK in read-only
mode.
>>>>>>>>>>>>>> I am using a fresh install of ZK
3.5.1-alpha where I
>> configure
>>>>>>> the
>>>>>>>>>>>>> installation to be in a 3 nodes ensemble.
>>>>>>>>>>>>>> I start this node only (QA-E8WIN11)
with
>>>>>>> -Dreadonlymode.enabled=true.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> I see that the node QA-E8WIN11 starts
the RO server properly:
>>>>>>>>>>>>>> 2016-07-12 16:10:10,955 [myid:1]
- INFO
>>>>>>>>>>>>> [Thread-4:ReadOnlyZooKeeperServer@73]
- Read-only server
>>>>>>> started
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Then I make a read-only enabled client:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>      ZooKeeper zk = new
>>>>>>>>>>>>> ZooKeeper("QA-E8WIN12:2181,QA-E8WIN13:2181,QA-E8WIN11:2181",
>>>>>>> 45000,
>>>>>>>>>> this,
>>>>>>>>>>>>> true);
>>>>>>>>>>>>>>      System.out.println("Successfully
established the
>>>>>>> connection
>>>>>>>>>>>>> with ZooKeeper");
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>      zk.getData("/", false, null);
>>>>>>>>>>>>>>      System.out.println("Done.");
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Note that only QA-E8WIN11 is started,
the other 2 are not.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> When the ZK client picks QA-E8WIN11
first, it works.
>>>>>>>>>>>>>> But when it picks a different node,
it fails with:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> 16:10:13.338 org.apache.zookeeper.ZooKeeper:716
- Initiating
>>>>>>> client
>>>>>>>>>>>>> connection,
>>>>>>>>>> connectString=QA-E8WIN12:2181,QA-E8WIN13:2181,QA-E8WIN11:2181
>>>>>>>>>>>>> sessionTimeout=45000 watcher=TestZkReadOnly@68de145
>>>>>>>>>>>>>> Successfully established the connection
with ZooKeeper
>>>>>>>>>>>>>> 16:10:13.475 org.apache.zookeeper.ClientCnxn:1138
- Opening
>>>>>>> socket
>>>>>>>>>>>>> connection to server QA-E8WIN13/10.11.8.230:2181
<
>>>>>>>>>>>>> http://10.11.8.230:2181/>. Will not
attempt to authenticate
>>>>>>> using
>>>>>>>>>> SASL
>>>>>>>>>>>>> (unknown error)
>>>>>>>>>>>>>> 16:10:28.469 org.apache.zookeeper.ClientCnxn:1251
- Client
>>>>>>> session
>>>>>>>>>>>>> timed out, have not heard from server
in 15001ms for sessionid
>>>>>>> 0x0,
>>>>>>>>>> closing
>>>>>>>>>>>>> socket connection and attempting reconnect
>>>>>>>>>>>>>> 16:10:28.574 org.apache.zookeeper.ClientCnxn:1138
- Opening
>>>>>>> socket
>>>>>>>>>>>>> connection to server QA-E8WIN12/10.11.8.232:2181
<
>>>>>>>>>>>>> http://10.11.8.232:2181/>. Will not
attempt to authenticate
>>>>>>> using
>>>>>>>>>> SASL
>>>>>>>>>>>>> (unknown error)
>>>>>>>>>>>>>> Exception in thread "main"
>>>>>>>>>>>>> org.apache.zookeeper.KeeperException$ConnectionLossException:
>>>>>>>>>>>>> KeeperErrorCode = ConnectionLoss for
/
>>>>>>>>>>>>>>  at
>>>>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
>>>>>>>>>>>>>>  at
>>>>>>>>>>>>> 
>>>>>>> org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
>>>>>>>>>>>>>>  at
>>>>>>> org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1753)
>>>>>>>>>>>>>>  at
>>>>>>> org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1782)
>>>>>>>>>>>>>>  at TestZkReadOnly.run(TestZkReadOnly.java:26)
>>>>>>>>>>>>>>  at TestZkReadOnly.main(TestZkReadOnly.java:16)
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> I'm attaching all the logs. The server
and the client are on
>>>>>>> the same
>>>>>>>>>>>>> machine QA-E8WIN11.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Any help would be greatly appreciated!
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>> Benjamin Jaton
>>>>>>>>>>>>>> <zkclient.log><zkserver.log>
>>>>>>>>>>>>> 
>>>>>>>>>>>>> 
>>>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>> 
>> 


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