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https://issues.apache.org/jira/browse/HBASE-30447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HBASE-30447 started by David Manning.
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> Table-level metrics can stop updating until the RegionServer restarts
> ---------------------------------------------------------------------
>
> Key: HBASE-30447
> URL: https://issues.apache.org/jira/browse/HBASE-30447
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.0.0, 3.0.0
> Reporter: David Manning
> Assignee: David Manning
> Priority: Minor
>
> It is possible for table-level metrics from
> {{MetricsTableWrapperAggregateImpl.java}} to stop updating, and continually
> produce the last static value until RegionServer restart.
> The cause is not known but the most likely result is some
> {{NullPointerException}} in the {{run}} method.
> Because an exception is not caught in the {{run}} method, the
> {{ScheduledFutureTask}} will no longer be scheduled after the uncaught
> exception is thrown.
> There is no logging, so the cause of us seeing this behavior is not currently
> known. But with this issue fix, we could have logging to identify the source
> of the exception, which could lead to other bug fixes.
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