[jira] [Created] (HBASE-19411) HBase should not override the Metrics System prefix if one exists already

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created HBASE-19411:
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             Summary: HBase should not override the Metrics System prefix if one exists already
                 Key: HBASE-19411
                 URL: https://issues.apache.org/jira/browse/HBASE-19411
             Project: HBase
          Issue Type: Bug
            Reporter: Haibo Chen
            Assignee: Ted Yu


Currently the following code in BaseSourceImpl is executed unconditionally:
{code}
      MetricsSystem metricsSys = DefaultMetricsSystem.instance();
{code}
As [~haibo.chen] pointed out in HBASE-19409, this would override the Metrics System prefix for the one NM has set up previously.

This issue is to avoid such override.



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