[jira] [Created] (HBASE-30447) Table-level metrics can stop updating until the RegionServer restarts

["David Manning (Jira)" <ji...@apache.org>]

David Manning created HBASE-30447:
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             Summary: 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: 3.0.0, 2.0.0
            Reporter: David Manning
            Assignee: David Manning


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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