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From Neha Narkhede <neha.narkh...@gmail.com>
Subject RE: broker never comes back to ISR
Date Wed, 21 Aug 2013 15:52:43 GMT
Could you take a thread dump on that broker and send it across? One of the
possibilities is the replica fetcher thread is somehow dead.

Thanks,
Neha
On Aug 21, 2013 8:00 AM, "Yu, Libo" <libo.yu@citi.com> wrote:

> I checked the log of normal restart. The replication manager should start
> to handle
> leader and isr request after the server is up. What may stop it from doing
> that?
> Is it because of missing mx4j-tools.jar?
>
> Regards,
>
> Libo
>
> From: Yu, Libo [ICG-IT]
> Sent: Wednesday, August 21, 2013 10:51 AM
> To: 'users@kafka.apache.org'
> Subject: broker never comes back to ISR
>
> Hi team,
>
> We have three kafka brokers in a production cluster. We use replication
> factor 3 for all topics.
> We notice quite frequently one broker is not in isr. Sometimes after it is
> restarted, it
> will go back to isr. Sometimes even after it is restarted, it will not go
> back to isr.
>
> In today's case, after a broker is restarted, this is what we found from
> the log:
>
> [2013-08-21 08:22:55,524] INFO [Kafka Server 2], started
> (kafka.server.KafkaServer)
> [2013-08-21 08:25:06,621] INFO Closing socket connection to /xxx.xx.xx.xx.
> (kafka.network.Processor)
> [2013-08-21 08:25:06,716] INFO Closing socket connection to /
> xxx.xx.xx.xx. (kafka.network.Processor)
> [2013-08-21 08:27:19,824] INFO Closing socket connection to /
> xxx.xx.xx.xx. (kafka.network.Processor)
> [2013-08-21 08:28:16,711] INFO Closing socket connection to /
> xxx.xx.xx.xx. (kafka.network.Processor)
> [2013-08-21 08:28:17,978] INFO Closing socket connection to /
> xxx.xx.xx.xx. (kafka.network.Processor)
> ...
> Numerous "Closing socket connection" and nothing else.
>
> Any guidance will be appreciated.
>
> Regards,
>
> Libo
>
>

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