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https://issues.apache.org/jira/browse/HBASE-19290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16268365#comment-16268365
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Appy edited comment on HBASE-19290 at 11/28/17 8:23 AM:
--------------------------------------------------------
(facepalm) Okay, I accept my thick headedness here. Many apologies for the
wasted time! (will try to make up for it somehow)
+1
If you haven't committed already, please change taskGrabbed to a boolean since
it's count doesn't matter.
was (Author: appy):
(facepalm) Okay, I accept my thick headedness here. Many apologies for the
wasted time!
+1
If you haven't committed already, please change taskGrabbed to a boolean since
it's count doesn't matter.
> Reduce zk request when doing split log
> --------------------------------------
>
> Key: HBASE-19290
> URL: https://issues.apache.org/jira/browse/HBASE-19290
> Project: HBase
> Issue Type: Improvement
> Reporter: binlijin
> Assignee: binlijin
> Attachments: HBASE-19290.master.001.patch,
> HBASE-19290.master.002.patch, HBASE-19290.master.003.patch,
> HBASE-19290.master.004.patch
>
>
> We observe once the cluster has 1000+ nodes and when hundreds of nodes abort
> and doing split log, the split is very very slow, and we find the
> regionserver and master wait on the zookeeper response, so we need to reduce
> zookeeper request and pressure for big cluster.
> (1) Reduce request to rsZNode, every time calculateAvailableSplitters will
> get rsZNode's children from zookeeper, when cluster is huge, this is heavy.
> This patch reduce the request.
> (2) When the regionserver has max split tasks running, it may still trying to
> grab task and issue zookeeper request, we should sleep and wait until we can
> grab tasks again.
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