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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6728) [89-fb] prevent OOM possibility due to per connection responseQueue being unbounded
Date Mon, 22 Oct 2012 20:52:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481779#comment-13481779
] 

Hudson commented on HBASE-6728:
-------------------------------

Integrated in HBase-TRUNK #3472 (See [https://builds.apache.org/job/HBase-TRUNK/3472/])
    HBASE-6728 revert (Revision 1401012)
HBASE-6728 prevent OOM possibility due to per connection responseQueue being unbounded (Revision
1401008)

     Result = FAILURE
tedyu : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/metrics/RegionServerDynamicMetrics.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/util/SizeBasedThrottler.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestSizeBasedThrottler.java

tedyu : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/metrics/RegionServerDynamicMetrics.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/util/SizeBasedThrottler.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestSizeBasedThrottler.java

                
> [89-fb] prevent OOM possibility due to per connection responseQueue being unbounded
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-6728
>                 URL: https://issues.apache.org/jira/browse/HBASE-6728
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Kannan Muthukkaruppan
>            Assignee: Michal Gregorczyk
>             Fix For: 0.96.0
>
>         Attachments: 6728-trunk.txt
>
>
> The per connection responseQueue is an unbounded queue. The request handler threads today
try to send the response in line, but if things start to backup, the response is sent via
a per connection responder thread. This intermediate queue, because it has no bounds, can
be another source of OOMs.
> [Have not looked at this issue in trunk. So it may or may not be applicable there.]

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