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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12903) IPC Server should allow suppressing exception logging by type, not log 'server too busy' messages
Date Wed, 09 Mar 2016 08:39:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15186759#comment-15186759
] 

Hudson commented on HADOOP-12903:
---------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9446 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9446/])
HADOOP-12903. IPC Server should allow suppressing exception logging by (arp: rev 2e040d31c7bba021576e6baf267d937da7ff814a)
* hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
* hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestServer.java


> IPC Server should allow suppressing exception logging by type, not log '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
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-12903.01.patch, HADOOP-12903.02.patch, HADOOP-12903.03.patch,
checkstyle-fixes.patch
>
>
> 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.
> The IPC Server should also allow services to skip logging certain exception types altogether.



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