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https://issues.apache.org/jira/browse/HBASE-7847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13960950#comment-13960950
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stack commented on HBASE-7847:
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[~rakeshr] So, we should require a zk 3.4.x for hbase? It was released
November 2011 so this seems like an OK requirement to add to our list. The
hang will happen on any zk before 3.4.6? When was multi added? Do you know?
Regardless of the zk version, is it true that you have to set the 'multi'
configuration property for us to even do a multi op in the first place? Is
this true? If so, and the zk version does not support multi ops and hbase
hangs, then we have a sort of defense and we can commit this.
Is it possible to ask zk what version it is? It was not possible in the past
but may be fixed in 3.4.6? If so, that'd be cool. Then we could ask and then
do multi going forward (Though if I remember, the issue here is that only one
member of the ensemble, the one we are talking too, could report itself 3.4.6
but all others could be at an earlier version).
Thanks [~rakeshr]
> Use zookeeper multi to clear znodes
> -----------------------------------
>
> Key: HBASE-7847
> URL: https://issues.apache.org/jira/browse/HBASE-7847
> Project: HBase
> Issue Type: Sub-task
> Reporter: Ted Yu
> Assignee: Rakesh R
> Attachments: 7847-v1.txt, 7847_v6.patch, 7847_v6.patch,
> HBASE-7847.patch, HBASE-7847.patch, HBASE-7847.patch, HBASE-7847_v4.patch,
> HBASE-7847_v5.patch, HBASE-7847_v6.patch
>
>
> In ZKProcedureUtil, clearChildZNodes() and clearZNodes(String procedureName)
> should utilize zookeeper multi so that they're atomic
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