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From "Eli Collins (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7949) Server maxIdleTime is way too low
Date Wed, 04 Jan 2012 20:05:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179823#comment-13179823

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",
> {noformat}

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