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Posted to dev@tuscany.apache.org by "Kelvin Goodson (JIRA)" <tu...@ws.apache.org> on 2007/03/13 17:29:09 UTC
[jira] Updated: (TUSCANY-1006)
ChangeSummaryImpl.cachedSDOObjectChanges appears to not be thread safe
[ https://issues.apache.org/jira/browse/TUSCANY-1006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kelvin Goodson updated TUSCANY-1006:
------------------------------------
Affects Version/s: (was: Java-SDO-Mx)
Java-SDO-M3
The above referenced bugzilla is resolved. Is there more to be done here or does that fix this issue?
> ChangeSummaryImpl.cachedSDOObjectChanges appears to not be thread safe
> ----------------------------------------------------------------------
>
> Key: TUSCANY-1006
> URL: https://issues.apache.org/jira/browse/TUSCANY-1006
> Project: Tuscany
> Issue Type: Bug
> Components: Java SDO Implementation
> Affects Versions: Java-SDO-M3
> Environment: Sun JDK 1.4.2_11, 2-CPU server
> Reporter: Ron Gavlin
> Priority: Critical
> Fix For: Java-SDO-Mx
>
>
> I have an application in which multiple threads access a shared ChangeSummaryImpl. Each thread invokes ChangeSummaryImpl.getOldValues() repeatedly. This causes one or more of the threads to enter an infinite "while (true) -" loop in HashMap.get(Object) with the following stack trace:
> HashMap.get(Object) line: 323
> ChangeSummaryImpl.getOldValues(DataObject) line: 481
> ...
> I suspect this occurs because the access to HashMap cachedSDOObjectChanges is not synchronized.
> I have been unable as of yet to create a simple test case that demonstrates the problem. In the meantime, I will try to implement a short-term fix by changing line 93 of ChangeSummaryImpl
> from
> protected HashMap cachedSDOObjectChanges = new HashMap();
> to
> protected Map cachedSDOObjectChanges = Collections.synchronizedMap(new HashMap());
> I will let you know if that fixes the problem. Any insight or assistance you can offer concerning this problem is appreciated. This is a show-stopper problem for us.
> Regards,
> - Ron
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