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https://issues.apache.org/jira/browse/WICKET-3910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13068283#comment-13068283
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Martin Grigorov commented on WICKET-3910:
-----------------------------------------
There are no known problems at the moment. The problem in the 3876 has been
fixed before introducing your impl.
> o.a.w.pageStore.AsynchronousDataStore#getData() returns null if the
> StoreEntryRunnable is currently running
> -----------------------------------------------------------------------------------------------------------
>
> Key: WICKET-3910
> URL: https://issues.apache.org/jira/browse/WICKET-3910
> Project: Wicket
> Issue Type: Bug
> Components: wicket-core
> Affects Versions: 1.5-RC5.1
> Environment: Hostspot 1.6.0_26, 1.5.0_22
> Reporter: Attila Király
> Assignee: Martin Grigorov
> Fix For: 1.5-RC6
>
> Attachments: fix-WICKET-3910.patch, modify-test-WICKET-3910.patch
>
>
> I am running "mvn clean package" on the command line and based on the jdk I
> get different results (reproducable).
> With jdk6 the test fails and the following is logged:
> ERROR - DiskDataStoreTest - data[] should never be null
> ERROR - DiskDataStoreTest - Detected error number: 1
> ERROR - DiskDataStoreTest - data[] should never be null
> ERROR - DiskDataStoreTest - Detected error number: 2
> Exception in thread "Thread-22" java.lang.NullPointerException
> at
> org.apache.wicket.page.persistent.disk.DiskDataStoreTest$Read1Runnable.run(DiskDataStoreTest.java:231)
> at java.lang.Thread.run(Thread.java:662)
> Exception in thread "Thread-42" java.lang.NullPointerException
> at
> org.apache.wicket.page.persistent.disk.DiskDataStoreTest$Read2Runnable.run(DiskDataStoreTest.java:264)
> at java.lang.Thread.run(Thread.java:662)
> With jdk5 everything goes fine and above message is not logged.
> The datastore in the test is returning null in the Read1Runnable and
> Read2Runnable which is causing the NPE.
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