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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1379) PermGen leak
Date Mon, 18 Nov 2013 18:19:25 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13825561#comment-13825561
] 

ASF subversion and git services commented on ACCUMULO-1379:
-----------------------------------------------------------

Commit 79d686faa1e477b9cbd80c6f833ece402050b490 in branch refs/heads/1.4.5-SNAPSHOT from [~busbey]
[ https://git-wip-us.apache.org/repos/asf?p=accumulo.git;h=79d686f ]

ACCUMULO-1858 Backport ZooKeeper clean up to 1.4 and 1.5.

Fix cherry picks two commits:

ACCUMULO-1379 - Adding close() to Instance to assist in freeing up resources

(cherry picked from commit 7da1164d87227960d3e0cfc841f753067e2c0304)

Reason: bugfix
Author: John Vines <jvines@gmail.com>

Differs from original by path changes and leaving out ConditionalWriterTest, which is only
in 1.6.0+

----

ACCUMULO-1379 Fix edge cases if error in closing ZooKeeperInstance

(cherry picked from commit 3f6c66ede52cb1fb5a122d7bad06d7978ff0a671)

Reason: bugfix
Author: Christopher Tubbs <ctubbsii@apache.org>

Signed-off-by: Bill Slacum <ujustgotbilld@apache.org>


>  PermGen leak 
> --------------
>
>                 Key: ACCUMULO-1379
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1379
>             Project: Accumulo
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.4.3, 1.5.0
>         Environment: Linux/JBoss
>            Reporter: Mike Giordano
>            Assignee: John Vines
>             Fix For: 1.6.0
>
>         Attachments: ACCUMULO-1379.patch, ACCUMULO-1379_v2.patch, ACCUMULO-1379_v3.patch
>
>
> Under version 1.3.7 we are using the following code to initialize a cloudbase connection
during initialization of our web app:
>                         ZooKeeperInstance instance = new ZooKeeperInstance(instanceName,
zooKeepers);
>                         connector = instance.getConnector(userId, password.getBytes());
> The problem is that under the hood, this call creates several threads that are not cleaned
up when the app is undeployed in JBoss. This is occurring without performing any scans or
interacting with cloudbase in any other way. After relatively few redeploys of the app, the
PermGen Space is OOM.
> I can't find any reference in the cloudbase API akin to a close() method for the Connector
object. This is a classloader leak effecting any webapp that is accessing cloudbase directly.
The result of this leak is not simply orphaned threads, but thousands of classes not gc'd
because the classloader itself can't be gc'd. This is what is filling up PermGen.



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