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Date: Mon, 6 Jul 2009 13:09:14 -0700 (PDT)
From: "Philipp Bracher (JIRA)" <jira@apache.org>
To: dev@jackrabbit.apache.org
Subject: [jira] Updated: (JCR-1440) NPE Thrown when two Cluster Nodes are
 hitting the same underlying database.
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     [ https://issues.apache.org/jira/browse/JCR-1440?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:all-tabpanel ]

Philipp Bracher updated JCR-1440:
---------------------------------

    Comment: was deleted

(was: Dear sender,

Due to marriage I have taken a new surname. Please use in future my new ema=
il address which is philipp.baerfuss@gmx.ch.

A copy of this mail has already been sent to the new account.

Have a nice day!

Philipp B=C3=A4rfuss


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> NPE Thrown when two Cluster Nodes are hitting the same underlying databas=
e.
> -------------------------------------------------------------------------=
--
>
>                 Key: JCR-1440
>                 URL: https://issues.apache.org/jira/browse/JCR-1440
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: clustering, jackrabbit-core
>    Affects Versions: 1.4, core 1.4.1
>         Environment: Vista JDK 1.5.0_12.  Using Derby and Derby Client 10=
.1.2.1
>            Reporter: Micah Whitacre
>            Priority: Critical
>         Attachments: jackrabbit-1.5-JCR-1440.tar.gz, jcr-1440-workaround.=
patch, repository1.xml, SimpleJackrabbitConflictTest.java, SimpleJackRabbit=
Test.zip
>
>
> I've created a test that creates two repositories with clustering enabled=
 that are backed by the same database.  Using the following workflow causes=
 a NullPointerException to be thrown.
> The workflow I'm using is:
> The root node is versioned.
> ClusterNode1 creates a versioned child node named "foo".
> The test waits to make sure the syncDelay has passed so ClusterNode2 will=
 notice the newly created node.
> ClusterNode2 retrieves the "foo" child node and removes it.
> The test waits for the change ClusterNode1 to sync with that change.
> ClusterNode1 tries to create another new node however a NullPointerExcept=
ion is thrown when the it tries to checkout the rootNode.
> java.lang.NullPointerException: null values not allowed
> =09at org.apache.commons.collections.map.AbstractReferenceMap.put(Abstrac=
tReferenceMap.java:251)
> =09at org.apache.jackrabbit.core.version.VersionManagerImpl.getItem(Versi=
onManagerImpl.java:280)
> =09at org.apache.jackrabbit.core.version.XAVersionManager.getItem(XAVersi=
onManager.java:334)
> =09at org.apache.jackrabbit.core.version.AbstractVersionManager.getVersio=
n(AbstractVersionManager.java:87)
> =09at org.apache.jackrabbit.core.NodeImpl.getBaseVersion(NodeImpl.java:31=
98)
> =09at org.apache.jackrabbit.core.NodeImpl.checkout(NodeImpl.java:2991)
> =09at com.cerner.system.configuration.repository.jcr.SimpleJackrabbitConf=
lictTest.testNullPointerExceptionThrown(SimpleJackrabbitConflictTest.java:9=
6)

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