Jean-Daniel Cryans created HBASE-8426:
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Summary: Opening a region failed on "Metrics source
RegionServer,sub=Regions already exists!"
Key: HBASE-8426
URL: https://issues.apache.org/jira/browse/HBASE-8426
Project: HBase
Issue Type: Bug
Affects Versions: 0.95.0
Reporter: Jean-Daniel Cryans
Priority: Critical
Fix For: 0.98.0, 0.95.1
Attachments: metrics_already_exist.txt
I restarted a cluster on 0.95 (1ecd4c7e0b22bba75c76f2fc2ce369541502b6df) and
some regions failed to open on their first assignment on an exception like:
{noformat}
Caused by: org.apache.hadoop.metrics2.MetricsException: Metrics source
RegionServer,sub=Regions already exists!
at
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:126)
at
org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:107)
at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:217)
at
org.apache.hadoop.hbase.metrics.BaseSourceImpl.<init>(BaseSourceImpl.java:75)
at
org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl.<init>(MetricsRegionAggregateSourceImpl.java:49)
at
org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl.<init>(MetricsRegionAggregateSourceImpl.java:41)
at
org.apache.hadoop.hbase.regionserver.MetricsRegionServerSourceFactoryImpl.getAggregate(MetricsRegionServerSourceFactoryImpl.java:33)
at
org.apache.hadoop.hbase.regionserver.MetricsRegionServerSourceFactoryImpl.createRegion(MetricsRegionServerSourceFactoryImpl.java:50)
at
org.apache.hadoop.hbase.regionserver.MetricsRegion.<init>(MetricsRegion.java:35)
at org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:488)
at org.apache.hadoop.hbase.regionserver.HRegion.<init>(HRegion.java:400)
{noformat}
I'm attaching a bigger log.
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