wei.he created HDFS-9473:
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Summary: access standy namenode slow
Key: HDFS-9473
URL: https://issues.apache.org/jira/browse/HDFS-9473
Project: Hadoop HDFS
Issue Type: Bug
Reporter: wei.he
access standy namenode slow
we have a hadoop cluster with 200 nodes. And use ha namenodes.
nn1 hadoop109 active
nn2 hadoop110 standby
after we switchover nms,
hadoop110(nn2) is active
hadoop109(nn1) is standy
when we access hdfs://hadoop109:8020 ( hdfs dfs -ls hdfs://hadoop109:8020),
that get the response sometimes fast, sometimes slow.
I tuned the rpc parameters about dfs.namenode.handler.count and
dfs.namenode.service.handler.count . the value from 105 to 150 (
>=20*ln(datanodes) ).
But the problem still occured.
Does someone have the same problem, and could give some suggestion ?
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