[infinispan-issues] [JBoss JIRA] (ISPN-8431) ScatteredSplitAndMergeTest random failures

[Radim Vansa (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-8431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13591385#comment-13591385 ] 

Radim Vansa commented on ISPN-8431:
-----------------------------------

I see what's the problem: when the entry is prefetched it is inserted into the cache mocking a state transfer update. However, if the state transfer manages to insert the entry during the prefetch, the prefetched update fails as the version is equal (not higher). However that means that the value in context is not updated either.

Fix (inserting the entry using {{wrapExternalEntry}}) should be easy, but I need to write a test for this. The logs also manifested that local loading of the RemoteMetadata during prefetch does not work properly ({{GetCacheEntryCommand}} returns {{null}} when value is {{null}} even if metadata is present).

> ScatteredSplitAndMergeTest random failures
> ------------------------------------------
>
>                 Key: ISPN-8431
>                 URL: https://issues.jboss.org/browse/ISPN-8431
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Test Suite - Core
>    Affects Versions: 9.2.0.Alpha1
>         Environment: Jenkins
>            Reporter: Tristan Tarrant
>            Assignee: Radim Vansa
>              Labels: testsuite_stability
>         Attachments: ScatteredSplitAndMergeTest_20180129.log.gz, ScatteredSplitAndMergeTest_ISPN-7919_RpcManager_ResponseCollector_20171212.log.gz
>
>
> http://ci.infinispan.org/job/Infinispan/job/master/214/testReport/junit/org.infinispan.partitionhandling/ScatteredSplitAndMergeTest/testSplitAndMerge5_SCATTERED_SYNC_/
> java.lang.AssertionError: expected [null] but found [v0]
> 	at org.infinispan.partitionhandling.ScatteredSplitAndMergeTest.testSplitAndMerge(ScatteredSplitAndMergeTest.java:80)
> 	at org.infinispan.partitionhandling.ScatteredSplitAndMergeTest.testSplitAndMerge5(ScatteredSplitAndMergeTest.java:51)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> 	at java.lang.Thread.run(Thread.java:748)
> ... Removed 20 stack frames
>     



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