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https://issues.apache.org/jira/browse/HBASE-17673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15885468#comment-15885468
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Guangxu Cheng commented on HBASE-17673:
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[[email protected]] In HBASE-17256, it is guaranteed that the total number
of tasks does not exceed MAX_TASKS(1000).
However, all tasks within a minute more than MAX_TASKS(low probability), rpc
tasks will be first deleted.
This patch may be more rigorous. Rpc tasks are placed in a separate list and
will never be deleted.
> Monitored RPC Handler not show in the WebUI
> -------------------------------------------
>
> Key: HBASE-17673
> URL: https://issues.apache.org/jira/browse/HBASE-17673
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0, 3.0.0, 1.2.4, 1.1.8
> Reporter: Allan Yang
> Assignee: Allan Yang
> Priority: Minor
> Attachments: HBASE-17673-branch-1.patch, HBASE-17673.patch
>
>
> This issue has been fixed once in HBASE-14674. But, I noticed that almost all
> RS in our production environment still have this problem. Strange thing is
> that newly started servers seems do not affected. Digging for a while, then I
> realize the {{CircularFifoBuffer}} introduced by HBASE-10312 is the root
> cause. The RPC hander's monitoredTask only create once, if the server is
> flooded with tasks, RPC monitoredTask can be purged by CircularFifoBuffer,
> and then never visible in WebUI.
> So my solution is creating a list for RPC monitoredTask separately. It is OK
> to do so since the RPC handlers remain in a fixed number. It won't increase
> or decrease during the lifetime of the server.
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