[jira] [Commented] (KAFKA-4540) Suspended tasks that are not assigned to the StreamThread need to be closed before new active and standby tasks are created

["Guozhang Wang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-4540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15749465#comment-15749465 ] 

Guozhang Wang commented on KAFKA-4540:
--------------------------------------

Is this already resolved as part of https://issues.apache.org/jira/browse/KAFKA-4509? In the patch we reorder the operations to first close all the suspended tasks and then try to create new tasks.

> Suspended tasks that are not assigned to the StreamThread need to be closed before new active and standby tasks are created
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-4540
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4540
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 0.10.2.0
>            Reporter: Damian Guy
>            Assignee: Damian Guy
>             Fix For: 0.10.2.0
>
>
> When partition assignment happens we first try and add the active tasks and then add the standby tasks. The problem with this is that a new active task might already be an existing suspended standby task. if this is the case then when the active task initialises it will throw an exception from RocksDB:
> {{Caused by: org.rocksdb.RocksDBException: IO error: lock /tmp/kafka-streams-7071/kafka-music-charts/1_1/rocksdb/all-songs/LOCK: No locks available}}
> We need to make sure we have removed an closed any no-longer assigned Suspended tasks before creating new tasks.



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