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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-7949) Server maxIdleTime is way too low
Date Wed, 04 Jan 2012 04:36:40 GMT
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: 1.0.0, 0.23.0, 0.22.0, 0.21.0
            Reporter: Eli Collins
            Assignee: Eli Collins


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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