yunjiong zhao created HDFS-11384:
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Summary: Add option for balancer to disperse getBlocks calls to
avoid NameNode's rpc.CallQueueLength spike
Key: HDFS-11384
URL: https://issues.apache.org/jira/browse/HDFS-11384
Project: Hadoop HDFS
Issue Type: Improvement
Components: balancer & mover
Affects Versions: 2.7.3
Reporter: yunjiong zhao
Assignee: yunjiong zhao
When running balancer on hadoop cluster which have more than 3000 Datanodes
will cause NameNode's rpc.CallQueueLength spike. We observed this situation
could cause Hbase cluster failure due to RegionServer's WAL timeout.
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