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From "Vikram Bhatia (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-230) Handle guaranteed delivery of Data Cache events on normal JVM termination using TCPRemoteCommitProvider
Date Fri, 27 Apr 2007 22:50:15 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12492413
] 

Vikram Bhatia commented on OPENJPA-230:
---------------------------------------

It works based on size of the packet queue. Once the broadcast queue is empty, it interrupts
the thread assuming that all the packets are broadcasted.

Why do _processLock is required?
It may call interrupt even if the thread is calling sendUpdateQueue if we dont have a syncronization.
I was thinking about having boolean variable, but that will have synchronization issues, and
thread may be interrupted without completely sending the packet.

> Handle guaranteed delivery of Data Cache events on normal JVM termination using TCPRemoteCommitProvider
> -------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-230
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-230
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 0.9.0, 0.9.6, 0.9.7
>            Reporter: Vikram Bhatia
>            Priority: Minor
>         Attachments: OPENJPA-230.patch, OPENJPA-230.patch, reproducer.zip, soln.diff
>
>
> When an application is commiting a transaction and then terminating, often not all events
regarding Data Cache are dispatched by the TCPRemoteCommitProvider. It seems that the JVM
on termination is not waiting until TCPRemoteCommitProvider has dispatched all events regarding
Data Cache. In this way some cache synchronization is lost.

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