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From "Eli Collins (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7949) Server maxIdleTime is way too low
Date Wed, 04 Jan 2012 04:38:40 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HADOOP-7949:
--------------------------------

    Attachment: hadoop-7949.txt

Patch attached. Defaults maxidletime in Server.java to 10000 instead of 1000, and updates
the various hard-coded ipc keys and defaults in Client and Server to use the relevant constants
to prevent similar future mistakes. 
                
> 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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