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https://issues.apache.org/jira/browse/DBCP-300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12754653#action_12754653
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Phil Steitz commented on DBCP-300:
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In this case, the locking is in DBCP itself:
public Connection getConnection() throws SQLException {
return createDataSource().getConnection();
}
and createDataSource is synchronized.
> remove synchronize access of createDataSource
> ---------------------------------------------
>
> Key: DBCP-300
> URL: https://issues.apache.org/jira/browse/DBCP-300
> Project: Commons Dbcp
> Issue Type: Improvement
> Affects Versions: 1.2.2
> Environment: RHEL, jdk1.5.0_12, commons-dbcp 1.2.2
> Reporter: Nikhil Singh
>
> For JDK1.5 onwards we can make the DataSource volatile and start using
> "double checked locking" idiom. In my performance testing I have already
> started seeing wait time on this lock.
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