[jira] [Commented] (MARMOTTA-489) Concurrency tests over H2 fail in MacOS

["Sebastian Schaffert (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MARMOTTA-489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14173687#comment-14173687 ] 

Sebastian Schaffert commented on MARMOTTA-489:
----------------------------------------------

The concurrency problems with H2 are known and due to the way H2 implements locking. Switching to Derby might help.

> Concurrency tests over H2 fail in MacOS
> ---------------------------------------
>
>                 Key: MARMOTTA-489
>                 URL: https://issues.apache.org/jira/browse/MARMOTTA-489
>             Project: Marmotta
>          Issue Type: Bug
>          Components: KiWi Triple Store
>    Affects Versions: 3.2.0
>         Environment: Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
> Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
> OSX 10.9.2 on MacBook Pro Retina, Mid 2012
>            Reporter: Sergio Fernández
>            Assignee: Sebastian Schaffert
>              Labels: h2
>             Fix For: 3.3.0
>
>         Attachments: MARMOTTA-489-traces.txt
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Some users have reported issues with the KiWi concurrency test against H2 while building the 3.2.0 release:
> http://markmail.org/message/35z7xzps4hbkfnfm#query:+page:1+mid:hkj4y53dbznukfo6+state:results
> {quote}
> On every first build I got an error in the AfterClass of the H2
> concurrency Test (kiwi-triplestore module).
>     org.apache.marmotta.kiwi.test.H2ConcurrencyTest  Time elapsed:
> 3.64 sec  <<< FAILURE!
>     java.lang.AssertionError: null
>         [..]
>         at
> org.apache.marmotta.kiwi.test.H2ConcurrencyTest.dropDatabase(H2ConcurrencyTest.java:63)
> Follow up builds (with -rf :kiwi-triplestore) have never shown this.
> New build sometimes do. Looks like if this is somehow related on how
> much Disc IO was done in-between two tests ...
> I also randomly got failures that do look like they where all related
> to concurrency (kiwi-triplestore module) (in –20% of the tests)
>     testPreparedTupleQuery2(org.apache.marmotta.kiwi.test.sesame.repository.KiWiRepositoryConnectionTest)
>  Time elapsed: 0.011 sec  <<< FAILURE!
>     java.lang.AssertionError: unexpected value for name: "Alice"
> expected:<"Bob"> but was:<"Alice">
>         [..]
>         at
> org.apache.marmotta.kiwi.test.junit.KiWiDatabaseRunner$DatabaseTestClassRunner$ExecutionLogger$1.evaluate(KiWiDatabaseRunner.java:313)
>         at
> org.apache.marmotta.kiwi.test.junit.KiWiDatabaseRunner$DatabaseTestClassRunner$CheckDBRule$1.evaluate(KiWiDatabaseRunner.java:295)
>         at
> org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
> There was also (once) an issue in the reasoner - could be also related
> to concurrency as AFAIK the reasoning is also done in an own thread
>     testResolveBaseTriplesMulti(org.apache.marmotta.kiwi.reasoner.test.engine.JustificationResolutionTest)
>  Time elapsed: 0.216 sec  <<< FAILURE!
>     java.lang.AssertionError: expected:<2> but was:<4>
>         [..]
>         at
> org.apache.marmotta.kiwi.reasoner.test.engine.JustificationResolutionTest.testResolveBaseTriplesMulti(JustificationResolutionTest.java:190)
> Finally two times I got what seams to be a deadlock of some sort in
> the org.apache.marmotta.platform.core.test.config.ConfigurationServiceTest
>     Thread qtp614303200-48 - /marmotta/resource/YR6ENRVc is waiting on
> an active Exclusive lock acquired in qtp614303200-48 -
> /marmotta/resource/YR6ENRVc
>     java.lang.Throwable: null
>         at
> info.aduna.concurrent.locks.LockManager.logStalledLock(LockManager.java:247)
> [sesame-sail-api-2.7.11.jar:na]
>         [...]
>         at
> org.openrdf.repository.base.RepositoryConnectionWrapper.setNamespace(RepositoryConnectionWrapper.java:489)
> [sesame-repository-api-2.7.11.jar:na]
>         at
> org.apache.marmotta.platform.core.services.triplestore.ContextServiceImpl.checkConnectionNamespace(ContextServiceImpl.java:150)
> [classes/:na]
> This exception was repeated every some minutes. I both cases I stopped
> the process after ~10min.
> {quote}



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