[jira] Updated: (SYNAPSE-595) Possible race condition in ConnectionPool implementation of nhhtp transport

["Supun Kamburugamuva (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SYNAPSE-595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Supun Kamburugamuva updated SYNAPSE-595:
----------------------------------------

    Attachment: SYNAPSE-595.patch

Attaching a patch that removes the double check locking.

Here is a document that describes why double checked locking doesn't work in java.

http://www.ibm.com/developerworks/java/library/j-dcl.html

> Possible race condition in ConnectionPool implementation of nhhtp transport
> ---------------------------------------------------------------------------
>
>                 Key: SYNAPSE-595
>                 URL: https://issues.apache.org/jira/browse/SYNAPSE-595
>             Project: Synapse
>          Issue Type: Bug
>          Components: Transports
>            Reporter: Supun Kamburugamuva
>         Attachments: SYNAPSE-595.patch
>
>
> The nhttp transport connection pool uses double checked locking when it releases a connection. But double checked locking is not a recommended practice in Java and its use is avoided. Simply because it is not working. 

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