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Posted to issues@commons.apache.org by "jeho0815 (JIRA)" <ji...@apache.org> on 2016/08/25 02:28:20 UTC
[jira] [Commented] (DBCP-470) Create a new BasicDataSource, the
database hasn't start, the DBCP's pool will be leaked
[ https://issues.apache.org/jira/browse/DBCP-470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15436144#comment-15436144 ]
jeho0815 commented on DBCP-470:
-------------------------------
Class Name Shallow Heap Retained Heap
org.apache.commons.dbcp.PoolableConnection @ 0xad601d30 48 128
org.apache.commons.dbcp.PoolableConnection @ 0xad5f8110 48 128
org.apache.commons.dbcp.PoolableConnection @ 0xad5f2f40 48 128
org.apache.commons.dbcp.PoolableConnection @ 0xad5e0d00 48 128
there are 512 connections leak, if the server wait timeout is long, may cause denie of service!
> Create a new BasicDataSource, the database hasn't start, the DBCP's pool will be leaked
> ---------------------------------------------------------------------------------------
>
> Key: DBCP-470
> URL: https://issues.apache.org/jira/browse/DBCP-470
> Project: Commons Dbcp
> Issue Type: Bug
> Affects Versions: 1.4
> Environment: All environment
> Reporter: jeho0815
> Labels: robustness, security
> Fix For: 1.4.1
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> First the database hasn't start, then create a new BasicDataSource. The method createDataSource judge dataSource == null, will create a new dataSource. The first step is create a connectionPool, second create a connectionFactory, but validateConnectionFactory will throw a SQLNestedException, the dataSource will be null again. Next itme repeat the steps again and again. The most import issue is create the connectionPool will be refered by a java.lang.Timer, so it can't be collected by GC. If the minIdle is positive, when database status is ok, it will create connection also.
> As a word, the bug will cause memory leak and may cause connection leak.
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