[infinispan-issues] [JBoss JIRA] (ISPN-2092) Write skew check not detected in LOCAL mode when doing multiple modifications

[Adrian Nistor (JIRA)]

Adrian Nistor created ISPN-2092:
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             Summary: Write skew check not detected in LOCAL mode when doing multiple modifications
                 Key: ISPN-2092
                 URL: https://issues.jboss.org/browse/ISPN-2092
             Project: Infinispan
          Issue Type: Bug
          Components: Transactions
    Affects Versions: 5.1.5.FINAL
         Environment: jdk 1.6.0_32, Fedora 16
            Reporter: Adrian Nistor
            Assignee: Adrian Nistor


Using a local cache with optimistic locking, repeatable read and write skew check, two threads will concurrently execute a transaction that put() the same key. In this case write skew check is properly detected and only one is able to commit. If the two threads modify two keys no write skew check happens and both will commit. It turns out there is an optimization in OptimisticLockingInterceptor for single modification transactions. The write skew check is properly done on this code path but is not done for the code path that handles transactions with multiple modifications. More specifically, LockAcquisitionVisitor.performWriteSkewCheck is not invoked at all. Please have a look at WriteSkewTest.testCheckWriteSkewWithMultipleModifications() in the pull request that demonstrates the issue.


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