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From "Json Tu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-4447) Controller resigned but it also acts as a controller for a long time
Date Mon, 28 Nov 2016 16:51:59 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-4447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15702465#comment-15702465
] 

Json Tu commented on KAFKA-4447:
--------------------------------

may be the phenomenon of these listener is the same as one zk's callback executing is very
very slow,and it leads to many back fired listener can only be executed after a long time.

> Controller resigned but it also acts as a controller for a long time 
> ---------------------------------------------------------------------
>
>                 Key: KAFKA-4447
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4447
>             Project: Kafka
>          Issue Type: Improvement
>          Components: controller
>    Affects Versions: 0.9.0.0, 0.9.0.1, 0.10.0.0, 0.10.0.1
>         Environment: Linux Os
>            Reporter: Json Tu
>         Attachments: log.tar.gz
>
>
> We have a cluster with 10 nodes,and we execute following operation as below.
> 1.we execute some topic partition reassign from one node to other 9 nodes in the cluster,
and which triggered controller.
> 2.controller invoke PartitionsReassignedListener's handleDataChange and read all partition
reassign rules from the zk path, and executed all onPartitionReassignment for all partition
that match conditions.
> 3.but the controller is expired from zk, after what some nodes of 9 nodes also expired
from zk.
> 5.then controller invoke onControllerResignation to resigned as the controller.
> we found after the controller is resigned, it acts as controller for about 3 minutes,
which can be found in my attachment.



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