[jira] [Updated] (STORM-256) storm rebalance bug caused supervisor miss topology’s assignment

["Rick Kellogg (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STORM-256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rick Kellogg updated STORM-256:
-------------------------------
    Summary: storm rebalance bug caused supervisor miss topology’s assignment  (was: storm relanace bug caused supervisor miss topology’s assignment)

> storm rebalance bug caused supervisor miss topology’s assignment
> ----------------------------------------------------------------
>
>                 Key: STORM-256
>                 URL: https://issues.apache.org/jira/browse/STORM-256
>             Project: Apache Storm
>          Issue Type: Bug
>            Reporter: vinceyang
>
> in our 300+ nodes cluster，when do rebalance low probability occurred supervisor miss topology‘s assignmet
> Process as Follows：
>  nimbus rebalance：
> 1 . receive relanace command
> 2.  nimbus chanage job status in zookeeper to "KILLED"
> 3.  compute new assignment and write assignment to zookeeper
> 4. chanage job status to “ACTIVE”
> supervisor rebalance (supervisor watch topology assinment node in zookeeper ):
> 1. when topology's status change to “KILLED”  ,supervisor receive chanage call  mk-synchronize-supervisor function
> 2.  in  mk-synchronize-supervisor function try to read  assignment from zookeeper ，For simplicity we name assigment-A，but before read out topology‘s status has change to “ACTIVE”，job’s assignment changed to assignment-B ， mk-synchronize-supervisor only read out assignment-B miss assignment-A
> 3. assignment-A missed, rebanace not become effective in this supervisor ， the whole topology not woring



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