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https://issues.apache.org/jira/browse/HADOOP-7949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179823#comment-13179823
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Eli Collins commented on HADOOP-7949:
-------------------------------------
Todd pointed out ipc.client.connection.maxidletime is set in core-default.xml
so the defaults here in the code are actually dead code. Doesn't seem like we
should define defaults in two places (the code and -default.xml) I'll file a
jira for that.
Test failure is cut paste error in the test, will fix that.
> Server maxIdleTime is way too low
> ---------------------------------
>
> Key: HADOOP-7949
> URL: https://issues.apache.org/jira/browse/HADOOP-7949
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 0.21.0, 0.22.0, 0.23.0, 1.0.0
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hadoop-7949.txt
>
>
> HADOOP-2909 intended to set the server max idle time for a connection to
> twice the client value. ("The server-side max idle time should be greater
> than the client-side max idle time, for example, twice of the client-side max
> idle time.") This way when a server times out a connection it's due a crashed
> client and not an inactive client so we don't close client connections with
> outstanding requests (by setting 2x the client value on the server side the
> client should time out the connection first).
> Looks like there was a typo in the patch and it set the default value to
> 1/5th the client value, instead of the intended 2x.
> {noformat}
> hadoop2 (pre-HADOOP-4687)$ git reset --hard 6fa4597e
> hadoop2 (pre-HADOOP-4687)$ grep -r ipc.client.connection.maxidletime .
> ./src/core/org/apache/hadoop/ipc/Client.java:
> conf.getInt("ipc.client.connection.maxidletime", 10000); //10s
> ./src/core/org/apache/hadoop/ipc/Server.java: this.maxIdleTime =
> 2*conf.getInt("ipc.client.connection.maxidletime", 1000);
> {noformat}
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