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From "Yu, Libo " <libo...@citi.com>
Subject RE: broker never comes back to ISR
Date Wed, 21 Aug 2013 14:59:05 GMT
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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