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From lalit jangra <lalit.j.jan...@gmail.com>
Subject Re: Getting errors in zookeeper logs
Date Tue, 16 Sep 2014 10:37:56 GMT
Hello Flavio,

Below are snapshot from logs i can see. I could see  multiple errors while
zookeeper is running.


2014-09-16 10:56:50,078 [myid:3] - INFO  [ProcessThread(sid:3
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x3487ddf57dd004f type:create cxid:0x1080
zxid:0xd0000a3ab txntype:-1 reqpath:n/a Error
Path:/org.apache.manifoldcf.locks-Solr:3F512EBFCFCC30070AC6A034726530577B7712B9
Error:KeeperErrorCode = NoNode for
/org.apache.manifoldcf.locks-Solr:3F512EBFCFCC30070AC6A034726530577B7712B9

2014-09-16 10:56:50,120 [myid:3] - INFO  [ProcessThread(sid:3
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x3487ddf57dd0071 type:create cxid:0x79e
zxid:0xd0000a3b8 txntype:-1 reqpath:n/a Error
Path:/org.apache.manifoldcf.locks-Solr:7FE7720ABD4211729605B45374AA3FE87A0E379E
Error:KeeperErrorCode = NoNode for
/org.apache.manifoldcf.locks-Solr:7FE7720ABD4211729605B45374AA3FE87A0E379E

2014-09-16 10:56:50,154 [myid:3] - INFO  [ProcessThread(sid:3
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x3487ddf57dd0054 type:create cxid:0xaa
zxid:0xd0000a3c8 txntype:-1 reqpath:n/a Error Path:/or


2014-09-16 10:37:57,590 [myid:5] - INFO  [ProcessThread(sid:5
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x1487dce96820026 type:create cxid:0x2fb
zxid:0xb00000864 txntype:-1 reqpath:n/a Error
Path:/org.apache.manifoldcf.locks-Solr:CEF2F7E4592DDB1786561160C16149CF68428D51
Error:KeeperErrorCode = NoNode for
/org.apache.manifoldcf.locks-Solr:CEF2F7E4592DDB1786561160C16149CF68428D51

2014-09-16 10:37:57,594 [myid:5] - INFO  [ProcessThread(sid:5
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x1487dce9682001f type:create cxid:0x67
zxid:0xb00000865 txntype:-1 reqpath:n/a Error
Path:/org.apache.manifoldcf.locks-Solr:CFCC6187B00BA4D0D7B45329CC1F5CFE0F54363B
Error:KeeperErrorCode = NoNode for
/org.apache.manifoldcf.locks-Solr:CFCC6187B00BA4D0D7B45329CC1F5CFE0F54363B

2014-09-16 10:37:57,642 [myid:5] - INFO  [ProcessThread(sid:5
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x3487dd037aa0006 type:create cxid:0x259
zxid:0xb00000872 txntype:-1 reqpath:n/a Error
Path:/org.apache.manifoldcf.locks-Solr:6EC9E05AA96792DBE9E1653076042355EA92F5AA
Error:KeeperErrorCode = NoNode for
/org.apache.manifoldcf.locks-Solr:6EC9E05AA96792DBE9E1653076042355EA92F5AA

2014-09-16 10:37:58,060 [myid:5] - WARN  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2182:NIOServerCnxnFactory@193] - Too many connections from /
10.231.72.24 - max is 60

2014-09-16 10:37:58,073 [myid:5] - WARN  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2182:NIOServerCnxnFactory@193] - Too many connections from /
10.231.72.24 - max is 60

2014-09-16 10:37:58,232 [myid:5] - INFO  [ProcessThread(sid:5
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing sessionid:0x3487dd037aa0006 type:create cxid:0x279
zxid:0xb0000089c txntype:-1 reqpath:n/a Error
Path:/org.apache.manifoldcf.locks-Solr:AD44DF3352B10CCB5790683E2E2332F7CD42D913
Error:KeeperErrorCode = NoNode for
/org.apache.manifoldcf.locks-Solr:AD44DF3352B10CCB5790683E2E2332F7CD42D913

2014-09-16 10:37:58,253 [myid:5] - INFO  [ProcessThread(sid:5
cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when
processing

On Tue, Sep 16, 2014 at 2:23 PM, Flavio Junqueira <
fpjunqueira@yahoo.com.invalid> wrote:

> It seems fine to limit the amount of memory, but I'd rather get the error
> that is preventing the servers from starting/making progress first.
>
> -Flavio
>
>
> On Tuesday, September 16, 2014 9:48 AM, lalit jangra <
> lalit.j.jangra@gmail.com> wrote:
>
>
> >
> >
> >Thanks Flavio,
> >
> >I will try and update. Can you confirm if i add java.env under conf folder
> >with JVM settings as "-Xms 1024m -Xmx1024m" , it will help to limit memory
> >size of zookeeper till 1 G only?
> >
> >Regards.
> >
> >On Tue, Sep 16, 2014 at 2:05 PM, Flavio Junqueira <
> >fpjunqueira@yahoo.com.invalid> wrote:
> >
> >> What if you use 'zkServer.sh start-foreground' to debug?
> >>
> >> -Flavio
> >>
> >>
> >> On Tuesday, September 16, 2014 5:20 AM, lalit jangra <
> >> lalit.j.jangra@gmail.com> wrote:
> >>
> >>
> >> >
> >> >
> >> >Hello Flavio,
> >> >
> >> >I am using 'zkServer.sh start' command to start zookeeper nodes. I also
> >> >could see logs in log folders in have specified but these logs are in a
> >> >form which is difficult to understand.
> >> >
> >> >Also  regarding to using 6 zookeeper nodes (3+3), is it fine to handle
> >> >failures as per 50% rule as if 3 are down my cluster should work or
> should
> >> >i move to having odd numbers such as 5 or 7 here?
> >> >
> >> >Regards.
> >> >
> >> >On Tue, Sep 16, 2014 at 4:26 AM, Flavio Junqueira <
> >> >fpjunqueira@yahoo.com.invalid> wrote:
> >> >
> >> >> Instead of guessing, I think it is best if we understand what's going
> >> >> wrong with the servers, you need to look at the server logs. If you
> >> don't
> >> >> know how to get it, could you please share the command you're using
> to
> >> >> start servers?
> >> >>
> >> >> -Flavio
> >> >>
> >> >>
> >> >>
> >> >> On Monday, September 15, 2014 3:30 PM, lalit jangra <
> >> >> lalit.j.jangra@gmail.com> wrote:
> >> >>
> >> >>
> >> >> >
> >> >> >
> >> >> >Hello Flavio,
> >> >> >
> >> >> >Can this issue arise from system not having enough RAM for Java
Heap
> >> as i
> >> >> >could see  my system is running on top of its RAM?
> >> >> >
> >> >> >Also is there any way to assign memory to zookeeper nodes?
> >> >> >
> >> >> >Regards.
> >> >> >
> >> >> >On Mon, Sep 15, 2014 at 7:37 PM, lalit jangra <
> >> lalit.j.jangra@gmail.com>
> >> >> >wrote:
> >> >> >
> >> >> >> Thanks Flavio,
> >> >> >>
> >> >> >> I am having 3+3 zookeeper nodes on two servers MCF1 &
MCF2. Also i
> >> could
> >> >> >> see same error on both nodes. For logs into servers, i am
not
> able to
> >> >> read
> >> >> >> anything from these, how can i read and interpret from zookeeper
> >> servers
> >> >> >> what is wrong?
> >> >> >>
> >> >> >> I have put different log & data directories for each of
zookeeper,
> >> may
> >> >> be
> >> >> >> i should elaborate a bit more. I am deciding on names of logs
&
> data
> >> >> >> directory as per myid (ranging from 1 to 6).
> >> >> >>
> >> >> >> ZK1 -> Data.1 -> Logs.1
> >> >> >> ZK2 -> Data.2 -> Logs.2
> >> >> >> ZK3 -> Data.3 -> Logs.3
> >> >> >> ZK4 -> Data.4 -> Logs.4
> >> >> >> ZK5 -> Data.5 -> Logs.5
> >> >> >> ZK6 -> Data.6 -> Logs.6
> >> >> >>
> >> >> >> As i have two servers only and i need to make it running on
these
> two
> >> >> only
> >> >> >> so i chose this architecture. Also i am trying to make even
for
> >> scenario
> >> >> >> where one node is down, i have only 3 zookeepers down so still
> >> second is
> >> >> >> working. If i have odd numbers say 5 or 7, if server with
more
> >> numbers
> >> >> of
> >> >> >> zookeeper is down, its gone.
> >> >> >>
> >> >> >> Regards.
> >> >> >>
> >> >> >>
> >> >> >> On Mon, Sep 15, 2014 at 7:29 PM, Flavio Junqueira <
> >> >> >> fpjunqueira@yahoo.com.invalid> wrote:
> >> >> >>
> >> >> >>> I believe you have shared just the client-side errors,
and I was
> >> >> >>> wondering what's going on with the servers. One problem
I could
> spot
> >> >> with
> >> >> >>> the configuration is with the values of dataDir and dataLogDir.
> It
> >> >> looks
> >> >> >>> like the processes on the same node are writing to the
same
> >> directory,
> >> >> >>> which should be confusing the servers.
> >> >> >>>
> >> >> >>> A couple of things about your setting. I'm not sure what
your
> >> >> motivation
> >> >> >>> is to put multiple servers on the same node. It will induce
> >> correlated
> >> >> >>> crashes for the servers on the same node. Also, we in
general
> >> >> recommend to
> >> >> >>> use an odd number of servers (5 or 7 for your case).
> >> >> >>>
> >> >> >>> -Flavio
> >> >> >>>
> >> >> >>> On Wednesday, September 10, 2014 6:29 AM, lalit jangra
<
> >> >> >>> lalit.j.jangra@gmail.com> wrote:
> >> >> >>>
> >> >> >>>
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >Hi,
> >> >> >>> >
> >> >> >>> >I am running cluster of two Apache ManifoldCF nodes
on two
> separate
> >> >> >>> >machines each of which having 3 zookeeper instances
(total 6
> >> >> instances in
> >> >> >>> >cluster). When i am running up manifoldCF agents,
i see below
> >> warning
> >> >> >>> >during startup.
> >> >> >>> >
> >> >> >>> >[http-bio-80-exec-2-SendThread(iwdc1preecma03.iwater.ie:2181)]
> >> INFO
> >> >> >>> >org.apache.zookeeper.ClientCnxn - Unable to read additional
data
> >> from
> >> >> >>> >server sessionid 0x0, likely server has closed socket,
closing
> >> socket
> >> >> >>> >connection and attempting reconnect
> >> >> >>> >
> >> >> >>> >[http-bio-80-exec-2-SendThread(iwdc2preecma04.iwater.ie:2182)]
> >> INFO
> >> >> >>> >org.apache.zookeeper.ClientCnxn - Opening socket connection
to
> >> server
> >> >> >>> >iwdc2preecma04.iwater.ie/10.231.72.25:2182. Will not
attempt to
> >> >> >>> >authenticate using SASL (unknown error)
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >Also i could see below error in logs in while agents
are
> running.
> >> >> >>> >
> >> >> >>> >[localhost-startStop-1-SendThread(iwdc1preecma03.iwater.ie:2183
> )]
> >> >> WARN
> >> >> >>> >org.apache.zookeeper.ClientCnxn - Session 0x6485a8006060079
for
> >> server
> >> >> >>> >iwdc1preecma03.iwater.ie/10.231.72.24:2183, unexpected
error,
> >> closing
> >> >> >>> >socket connection and attempting reconnect
> >> >> >>> >
> >> >> >>> >java.io.IOException: Connection reset by peer
> >> >> >>> >
> >> >> >>> >        at sun.nio.ch.FileDispatcherImpl.read0(Native
Method)
> >> >> >>> >
> >> >> >>> >        at
> >> sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> >> >> >>> >
> >> >> >>> >        at
> sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:225)
> >> >> >>> >
> >> >> >>> >        at sun.nio.ch.IOUtil.read(IOUtil.java:193)
> >> >> >>> >
> >> >> >>> >        at
> >> >> sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:375)
> >> >> >>> >
> >> >> >>> >        at
> >> >> >>>
> >> >> >>>
> >> >>
> >>
> >org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:68)
> >> >> >>> >
> >> >> >>> >        at
> >> >> >>>
> >> >> >>>
> >> >>
> >>
> >org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:355)
> >> >> >>> >
> >> >> >>> >        at
> >> >> >>>
> >> >org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >Below are configurations for 1. zookeeper nodes &
2. MCF nodes
> for
> >> >> >>> >zookeeper.
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >*zoo.cfg :  Same for all six zookeeper nodes.*
> >> >> >>> >
> >> >> >>> >
> >> >> >>> ># The number of milliseconds of each tick
> >> >> >>> >
> >> >> >>> >tickTime=2000
> >> >> >>> >
> >> >> >>> >dataDir=/app/IW/zookeeper/data/data.1
> >> >> >>> >
> >> >> >>> >dataLogDir=/app/IW/zookeeper/logs/log.1
> >> >> >>> >
> >> >> >>> >clientPort=2181
> >> >> >>> >
> >> >> >>> >server.1=iwdc1preecma03:2888:3888
> >> >> >>> >
> >> >> >>> >server.2=iwdc1preecma03:2889:3889
> >> >> >>> >
> >> >> >>> >server.3=iwdc1preecma03:2890:3890
> >> >> >>> >
> >> >> >>> >server.4=iwdc2preecma04:2891:3891
> >> >> >>> >
> >> >> >>> >server.5=iwdc2preecma04:2892:3892
> >> >> >>> >
> >> >> >>> >server.6=iwdc2preecma04:2893:3893
> >> >> >>> >
> >> >> >>> ># The number of ticks that the initial
> >> >> >>> >
> >> >> >>> ># synchronization phase can take
> >> >> >>> >
> >> >> >>> >initLimit=10
> >> >> >>> >
> >> >> >>> ># The number of ticks that can pass between
> >> >> >>> >
> >> >> >>> ># sending a request and getting an acknowledgement
> >> >> >>> >
> >> >> >>> >syncLimit=5
> >> >> >>> >
> >> >> >>> ># the directory where the snapshot is stored.
> >> >> >>> >
> >> >> >>> ># do not use /tmp for storage, /tmp here is just
> >> >> >>> >
> >> >> >>> ># example sakes.
> >> >> >>> >
> >> >> >>> >#dataDir=/tmp/zookeeper
> >> >> >>> >
> >> >> >>> ># the port at which the clients will connect
> >> >> >>> >
> >> >> >>> >#clientPort=2181
> >> >> >>> >
> >> >> >>> ># the maximum number of client connections.
> >> >> >>> >
> >> >> >>> ># increase this if you need to handle more clients
> >> >> >>> >
> >> >> >>> >#maxClientCnxns=60
> >> >> >>> >
> >> >> >>> >#
> >> >> >>> >
> >> >> >>> ># Be sure to read the maintenance section of the
> >> >> >>> >
> >> >> >>> ># administrator guide before turning on autopurge.
> >> >> >>> >
> >> >> >>> >#
> >> >> >>> >
> >> >> >>> >#
> >> >> >>>
> >> >>
> >>
> http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
> >> >> >>> >
> >> >> >>> >#
> >> >> >>> >
> >> >> >>> ># The number of snapshots to retain in dataDir
> >> >> >>> >
> >> >> >>> >autopurge.snapRetainCount=3
> >> >> >>> >
> >> >> >>> ># Purge task interval in hours
> >> >> >>> >
> >> >> >>> ># Set to "0" to disable auto purge feature
> >> >> >>> >
> >> >> >>> >autopurge.purgeInterval=1
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >*ManifoldCF configurations : same for both ManifoldCF
nodes.*
> >> >> >>> >
> >> >> >>> >
> >> >> >>> ><property name="org.apache.manifoldcf.lockmanagerclass"
> >> >> >>>
> >> >value="org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager"/>
> >> >> >>> >
> >> >> >>> >  <property name="org.apache.manifoldcf.zookeeper.connectstring"
> >> >> >>>
> >> >> >>>
> >> >>
> >>
> >value="iwdc1preecma03:2181,iwdc1preecma03:2182,iwdc1preecma03:2183,iwdc2preecma04:2181,iwdc2preecma04:2182,iwdc2preecma04:2183"/>
> >> >> >>> >
> >> >> >>> ><property name="org.apache.manifoldcf.zookeeper.sessiontimeout"
> >> >> >>> >value="4000"/>
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >*I want to know if due to above warnings/errors, will
zookeeper
> >> stop
> >> >> >>> >working or will zookeeper will work and these are
non-failing
> >> >> messages,
> >> >> >>> >because ManifoldCF jobs are stuck while i can see
these errors.*
> >> >> >>> >
> >> >> >>> >Please suggest.
> >> >> >>> >
> >> >> >>> >Regards,
> >> >> >>> >Lalit.
> >
> >> >
> >> >> >
> >> >> >>> >
> >> >> >>> >
> >> >> >>> >
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> --
> >> >> >> Regards,
> >> >> >> Lalit.
> >> >> >>
> >> >> >
> >> >> >
> >> >> >
> >> >> >--
> >> >> >Regards,
> >> >> >Lalit.
> >> >> >
> >> >> >
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> >--
> >> >Regards,
> >> >Lalit.
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >--
> >Regards,
> >Lalit.
> >
> >
> >
>



-- 
Regards,
Lalit.

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