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From "Allan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17673) Monitored RPC Handler not show in the WebUI
Date Tue, 21 Feb 2017 04:22:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allan Yang updated HBASE-17673:
-------------------------------
    Description: 
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 create 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.

  was:
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 create a list for RPC monitoredTask sepreately. 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.


> 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 create 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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