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Posted to common-issues@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2016/03/08 00:09:40 UTC
[jira] [Created] (HADOOP-12903) Add IPC Server support for
suppressing exceptions by type, suppress 'server too busy' messages
Arpit Agarwal created HADOOP-12903:
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Summary: Add IPC Server support for suppressing exceptions by type, suppress 'server too busy' messages
Key: HADOOP-12903
URL: https://issues.apache.org/jira/browse/HADOOP-12903
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 2.7.2
Reporter: Arpit Agarwal
Assignee: Arpit Agarwal
HADOOP-10597 added support for RPC congestion control by sending retriable 'server too busy' exceptions to clients.
However every backoff results in a log message. We've seen these log messages slow down the NameNode.
{code}
2016-03-07 15:02:23,272 INFO org.apache.hadoop.ipc.Server: Socket Reader #1 for port 8020: readAndProcess from client 127.0.0.1 threw exception [org.apache.hadoop.ipc.RetriableException: Server is too busy.]
{code}
We already have a metric that tracks the number of backoff events. This log message adds nothing useful.
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