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From "Andrus Adamchik (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAY-1749) NPE on simple nested context commit
Date Sun, 21 Oct 2012 09:30:11 GMT
Andrus Adamchik created CAY-1749:
------------------------------------

             Summary: NPE on simple nested context commit
                 Key: CAY-1749
                 URL: https://issues.apache.org/jira/browse/CAY-1749
             Project: Cayenne
          Issue Type: Bug
          Components: Core Library
    Affects Versions: 3.1B2
            Reporter: Andrus Adamchik
            Assignee: Andrus Adamchik


An odd problem happens when building on Jenkins. E.g. this build (Java 7, HSQLDB) :

https://builds.apache.org/job/Cayenne-trunk/cayenneTestConnection=HSQLDB,jdk=JDK%201.7%20%28latest%29,label=Ubuntu/781/

results in the following exception:
-------------------------------------------------------------------------------
Test set: org.apache.cayenne.access.NestedDataContextWriteTest
-------------------------------------------------------------------------------
Tests run: 11, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.151 sec <<< FAILURE!
testAddRemove(org.apache.cayenne.access.NestedDataContextWriteTest)  Time elapsed: 0.012 sec
 <<< ERROR!
java.lang.NullPointerException
	at org.apache.commons.collections.map.AbstractReferenceMap$ReferenceEntry.getValue(AbstractReferenceMap.java:597)
	at org.apache.commons.collections.map.AbstractReferenceMap.get(AbstractReferenceMap.java:234)
	at org.apache.cayenne.access.ObjectStore.postprocessAfterCommit(ObjectStore.java:417)
	at org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:771)
	at org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:697)
	at org.apache.cayenne.access.NestedDataContextWriteTest.testAddRemove(NestedDataContextWriteTest.java:632)


The code is as vanilla and single threaded as it gets:

        DataContext context = createDataContext();
        ObjectContext child = runtime.getContext(context);

        Artist a = child.newObject(Artist.class);
        a.setArtistName("X");
        child.commitChanges(); // this is line 632 that causes exception

It appears that ObjectStore.objectMap somehow gets corrupted... Sure enough it is only reproducible
on Jenkins, and never - locally.

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