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  1. HBase
  2. HBASE-18568

Correct metric of numRegions

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      i found the value of metric numReigons in Regions is not correct.
      the metric can not add or remove region correctly as region close or open.
      the metric as follow:

      "name" : "Hadoop:service=HBase,name=RegionServer,sub=Regions",
      "numRegions" : 2,

      after trouble shooting ,i found the reason is in MetricsRegionSourceImpl#MetricsRegionSourceImpl

      agg.register(this);
      ...
      hashCode = regionWrapper.getRegionHashCode();
      

      when add the MetricsRegionSource to set ,but the hashCode has not yet initialized.
      So, the setFromMap can not put or remove the object correctly.
      it will be better like this :

      hashCode = regionWrapper.getRegionHashCode();
      agg.register(this);
      

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        1. HBASE-18568-V1.patch
          2 kB
          Shibin Zhang

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              • Assignee:
                zhangshibin Shibin Zhang
                Reporter:
                zhangshibin Shibin Zhang
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