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Posted to dev@openjpa.apache.org by "Daniel Persson (JIRA)" <ji...@apache.org> on 2012/07/11 10:53:33 UTC
[jira] [Comment Edited] (OPENJPA-2193) Nullpointer exception when
persisting object during high load
[ https://issues.apache.org/jira/browse/OPENJPA-2193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13411330#comment-13411330 ]
Daniel Persson edited comment on OPENJPA-2193 at 7/11/12 8:51 AM:
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Seems that tomcat discards abandoned connections and then the GC is closing the connection.
I added code to save the an new exception on the free function and then sends that stacktrace to err when the error occurs.
Caused by: java.lang.Exception
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$RefCountConnection.free(JDBCStoreManager.java:1645)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$RefCountConnection.close(JDBCStoreManager.java:1621)
at org.apache.openjpa.lib.jdbc.DelegatingConnection.close(DelegatingConnection.java:183)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$ClientConnection.close(JDBCStoreManager.java:1577)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$ClientConnection.finalize(JDBCStoreManager.java:1582)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
was (Author: kalaspuffar):
Seems that tomcat discards abandoned connections and then the GC is closing the connection.
Caused by: java.lang.Exception
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$RefCountConnection.free(JDBCStoreManager.java:1645)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$RefCountConnection.close(JDBCStoreManager.java:1621)
at org.apache.openjpa.lib.jdbc.DelegatingConnection.close(DelegatingConnection.java:183)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$ClientConnection.close(JDBCStoreManager.java:1577)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$ClientConnection.finalize(JDBCStoreManager.java:1582)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
> Nullpointer exception when persisting object during high load
> -------------------------------------------------------------
>
> Key: OPENJPA-2193
> URL: https://issues.apache.org/jira/browse/OPENJPA-2193
> Project: OpenJPA
> Issue Type: Bug
> Reporter: Daniel Persson
> Priority: Minor
> Attachments: patch-tomcat-pooling-fix.patch
>
>
> During high load and many persists _conn is null during commit.
> Caused by: <openjpa-2.2.0-r422266:1244990 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: null
> at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(BrokerImpl.java:2034)
> at org.apache.openjpa.kernel.LocalManagedRuntime.commit(LocalManagedRuntime.java:94)
> at org.apache.openjpa.kernel.BrokerImpl.commit(BrokerImpl.java:1514)
> at org.apache.openjpa.kernel.DelegatingBroker.commit(DelegatingBroker.java:933)
> at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:570)
> ... 29 more
> Caused by: java.lang.NullPointerException
> at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.commit(JDBCStoreManager.java:196)
> at org.apache.openjpa.kernel.DelegatingStoreManager.commit(DelegatingStoreManager.java:95)
> at org.apache.openjpa.datacache.DataCacheStoreManager.commit(DataCacheStoreManager.java:88)
> at org.apache.openjpa.kernel.DelegatingStoreManager.commit(DelegatingStoreManager.java:95)
> at org.apache.openjpa.kernel.BrokerImpl.endStoreManagerTransaction(BrokerImpl.java:1471)
> at org.apache.openjpa.kernel.BrokerImpl.endTransaction(BrokerImpl.java:2351)
> at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(BrokerImpl.java:2010)
> ... 33 more
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