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From "Bart Vercammen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-5153) KAFKA Cluster : 0.10.2.0 : Servers Getting disconnected : Service Impacting
Date Mon, 12 Jun 2017 13:04:01 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-5153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16046534#comment-16046534
] 

Bart Vercammen commented on KAFKA-5153:
---------------------------------------

[~arpan.khagram0212@gmail.com] Can you confirm that changing the default config fixed the
issue for you?
{noformat}
replica.fetch.wait.max.ms
replica.lag.time.max.ms
{noformat}

We're also hitting this issue continuously on our clusters, running Kafka 0.10.1.1, and also
encountered it (or at least something with the same symptoms) on our Kafka 0.10.2.1 clusters.
Still need to investigate more in detail what is actually triggering this, so any tips or
insights would be welcome ...

> KAFKA Cluster : 0.10.2.0 : Servers Getting disconnected : Service Impacting
> ---------------------------------------------------------------------------
>
>                 Key: KAFKA-5153
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5153
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.10.2.0
>         Environment: RHEL 6
> Java Version  1.8.0_91-b14
>            Reporter: Arpan
>            Priority: Critical
>         Attachments: server_1_72server.log, server_2_73_server.log, server_3_74Server.log,
server.properties, ThreadDump_1493564142.dump, ThreadDump_1493564177.dump, ThreadDump_1493564249.dump
>
>
> Hi Team, 
> I was earlier referring to issue KAFKA-4477 because the problem i am facing is similar.
I tried to search the same reference in release docs as well but did not get anything in 0.10.1.1
or 0.10.2.0. I am currently using 2.11_0.10.2.0.
> I am have 3 node cluster for KAFKA and cluster for ZK as well on the same set of servers
in cluster mode. We are having around 240GB of data getting transferred through KAFKA everyday.
What we are observing is disconnect of the server from cluster and ISR getting reduced and
it starts impacting service.
> I have also observed file descriptor count getting increased a bit, in normal circumstances
we have not observed FD count more than 500 but when issue started we were observing it in
the range of 650-700 on all 3 servers. Attaching thread dumps of all 3 servers when we started
facing the issue recently.
> The issue get vanished once you bounce the nodes and the set up is not working more than
5 days without this issue. Attaching server logs as well.
> Kindly let me know if you need any additional information. Attaching server.properties
as well for one of the server (It's similar on all 3 serversP)



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