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Posted to dev@openjpa.apache.org by "Norman Maurer (JIRA)" <ji...@apache.org> on 2010/10/07 19:29:32 UTC
[jira] Created: (OPENJPA-1827) ClassCastException /
org.apache.openjpa.persistence.ArgumentException on heavy processing
ClassCastException / org.apache.openjpa.persistence.ArgumentException on heavy processing
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Key: OPENJPA-1827
URL: https://issues.apache.org/jira/browse/OPENJPA-1827
Project: OpenJPA
Issue Type: Bug
Affects Versions: 2.0.1
Reporter: Norman Maurer
For more details see:
http://openjpa.208410.n2.nabble.com/ClassCastException-org-apache-openjpa-persistence-ArgumentException-on-heavy-processing-td5607876.html#a5607876
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[jira] Commented: (OPENJPA-1827) ClassCastException /
org.apache.openjpa.persistence.ArgumentException on heavy processing
Posted by "Kevin Sutter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OPENJPA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925816#action_12925816 ]
Kevin Sutter commented on OPENJPA-1827:
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Disabling the QuerySQLCache affects the caching of generated SQL (which is based on the JPQL queries). JPQL Queries that are used over and over again will benefit from the generated SQL being cached. Otherwise, the SQL has to be re-generated each time it is used.
So, the impact of disabling this particular QuerySQLCache depends on your application. If you have a few JPQL Queries that are used extensively, then you will pay a slight performance concern if the SQL has to be re-generated every time the JPQL is used. But, if your application uses many different JPQL Queries (maybe the JPQL string is modified based on usage), then the use of the QuerySQLCache is not as important since we wouldn't find an "exact match" in the cache anyway.
This problem still needs to be fixed. I was just trying to explain the potential performance impact (since I mentioned the concern in the nabble conversation).
Kevin
> ClassCastException / org.apache.openjpa.persistence.ArgumentException on heavy processing
> ------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1827
> URL: https://issues.apache.org/jira/browse/OPENJPA-1827
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.1
> Reporter: Norman Maurer
>
> For more details see:
> http://openjpa.208410.n2.nabble.com/ClassCastException-org-apache-openjpa-persistence-ArgumentException-on-heavy-processing-td5607876.html#a5607876
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[jira] Updated: (OPENJPA-1827) ClassCastException /
org.apache.openjpa.persistence.ArgumentException on heavy processing
Posted by "Norman Maurer (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OPENJPA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Norman Maurer updated OPENJPA-1827:
-----------------------------------
Attachment: OPENJPA-1827.tar.gz
just unpack the tarball and run the test with "mvn clean test" as proof of the bug
> ClassCastException / org.apache.openjpa.persistence.ArgumentException on heavy processing
> ------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1827
> URL: https://issues.apache.org/jira/browse/OPENJPA-1827
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.1
> Reporter: Norman Maurer
> Attachments: OPENJPA-1827.tar.gz
>
>
> For more details see:
> http://openjpa.208410.n2.nabble.com/ClassCastException-org-apache-openjpa-persistence-ArgumentException-on-heavy-processing-td5607876.html#a5607876
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[jira] Commented: (OPENJPA-1827) ClassCastException /
org.apache.openjpa.persistence.ArgumentException on heavy processing
Posted by "Rick Curtis (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OPENJPA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925809#action_12925809 ]
Rick Curtis commented on OPENJPA-1827:
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Would it be possible to write a small unit test that recreates the problem?
> ClassCastException / org.apache.openjpa.persistence.ArgumentException on heavy processing
> ------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1827
> URL: https://issues.apache.org/jira/browse/OPENJPA-1827
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.1
> Reporter: Norman Maurer
>
> For more details see:
> http://openjpa.208410.n2.nabble.com/ClassCastException-org-apache-openjpa-persistence-ArgumentException-on-heavy-processing-td5607876.html#a5607876
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[jira] Commented: (OPENJPA-1827) ClassCastException /
org.apache.openjpa.persistence.ArgumentException on heavy processing
Posted by "Norman Maurer (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/OPENJPA-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925744#action_12925744 ]
Norman Maurer commented on OPENJPA-1827:
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Any news on this ? Disabling the cache works as workaround but does really limit the performance.
> ClassCastException / org.apache.openjpa.persistence.ArgumentException on heavy processing
> ------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1827
> URL: https://issues.apache.org/jira/browse/OPENJPA-1827
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.1
> Reporter: Norman Maurer
>
> For more details see:
> http://openjpa.208410.n2.nabble.com/ClassCastException-org-apache-openjpa-persistence-ArgumentException-on-heavy-processing-td5607876.html#a5607876
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