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https://issues.apache.org/jira/browse/JENA-131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147995#comment-13147995
]
Simon Helsen commented on JENA-131:
-----------------------------------
I reran the same test suite and this time I didn't see anything, so the issue
in my previous comment seems rare. As always, probably a race condition, so it
is going to be really hard to construct a test case. Perhaps T_TransSystem.java
can be tuned to recreate the issue.
> TxTDB problem during concurrent execution
> -----------------------------------------
>
> Key: JENA-131
> URL: https://issues.apache.org/jira/browse/JENA-131
> Project: Jena
> Issue Type: Bug
> Components: TDB
> Environment: arq-2.8.9-20111001.145524-39 and
> tx-tdb-0.9.0-20111006.082548-13 on IBM JRE 6
> Reporter: Simon Helsen
> Attachments: patch.txt, patch.txt
>
>
> In a massive concurrent test with many reads and writes, I am running into
> the problems shown below. I suspect the problem only occurs if a read and
> write are trying to operate on the same data at the same time, i.e. the
> transactions don't isolate enough. My test case is inside the framework. I
> currently have no test case for you to try, but I am hoping you can see
> something by inspecting the stack trace
> ModelWriteActivity: 1579ms
> 17:46:27,183 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterConcat/55657
> 17:46:27,254 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterSingleton/55658
> 17:46:27,257 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterPeek/55659
> 17:46:27,261 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterTDB/55660
> 17:46:27,264 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterOptionalIndex/55661
> 17:46:27,335 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterOptionalIndex/55662
> 17:46:27,338 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterDefaulting/55803
> 17:46:27,395 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterDefaulting/55807
> 17:46:27,399 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterPeek/55808
> 17:46:27,403 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterTDB/55809
> 17:46:27,406 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterAssign/55810
> 17:46:27,410 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterSingleton/55811
> 17:46:27,490 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterPeek/55812
> 17:46:27,493 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterTDB/55813
> 17:46:27,497 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterOptionalIndex/55814
> 17:46:27,502 [1948218399@qtp-533667791-14] WARN
> hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator:
> QueryIterOptionalIndex/55815
> 17:46:27,507 [1948218399@qtp-533667791-14] ERROR com.ibm.team.jfs
> - Originating Exception:
> java.lang.IndexOutOfBoundsException: Index: 20, Size: 18
> at java.util.ArrayList.remove(ArrayList.java:552)
> at java.util.ArrayList.remove(ArrayList.java:572)
> at
> com.hp.hpl.jena.tdb.transaction.Transaction.removeIterator(Transaction.java:188)
> at
> com.hp.hpl.jena.tdb.transaction.BlockMgrJournal.endIterator(BlockMgrJournal.java:312)
> at
> com.hp.hpl.jena.tdb.transaction.BlockMgrJournal.endIterator(BlockMgrJournal.java:313)
> at
> com.hp.hpl.jena.tdb.base.block.BlockMgrWrapper.endIterator(BlockMgrWrapper.java:134)
> at
> com.hp.hpl.jena.tdb.base.recordbuffer.RecordRangeIterator.close(RecordRangeIterator.java:155)
> at
> com.hp.hpl.jena.tdb.base.recordbuffer.RecordRangeIterator.hasNext(RecordRangeIterator.java:112)
> at org.openjena.atlas.iterator.Iter$4.hasNext(Iter.java:274)
> at
> com.hp.hpl.jena.tdb.sys.DatasetControlMRSW$IteratorCheckNotConcurrent.hasNext(DatasetControlMRSW.java:119)
> at org.openjena.atlas.iterator.Iter$3.hasNext(Iter.java:164)
> at org.openjena.atlas.iterator.Iter$6.hasNext(Iter.java:359)
> at org.openjena.atlas.iterator.Iter$3.hasNext(Iter.java:164)
> at org.openjena.atlas.iterator.Iter$4.hasNext(Iter.java:274)
> at org.openjena.atlas.iterator.Iter$3.hasNext(Iter.java:164)
> at org.openjena.atlas.iterator.Iter.hasNext(Iter.java:742)
> at
> org.openjena.atlas.iterator.RepeatApplyIterator.hasNext(RepeatApplyIterator.java:58)
> at
> org.openjena.atlas.iterator.RepeatApplyIterator.hasNext(RepeatApplyIterator.java:46)
> at
> org.openjena.atlas.iterator.RepeatApplyIterator.hasNext(RepeatApplyIterator.java:46)
> at
> org.openjena.atlas.iterator.RepeatApplyIterator.hasNext(RepeatApplyIterator.java:46)
> at
> org.openjena.atlas.iterator.RepeatApplyIterator.hasNext(RepeatApplyIterator.java:46)
> at org.openjena.atlas.iterator.Iter$4.hasNext(Iter.java:274)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterPlainWrapper.hasNextBinding(QueryIterPlainWrapper.java:54)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage(QueryIterRepeatApply.java:106)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:65)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage(QueryIterRepeatApply.java:106)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:65)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.tdb.solver.OpExecutorTDB.optimizeExecuteQuads(OpExecutorTDB.java:215)
> at
> com.hp.hpl.jena.tdb.solver.OpExecutorTDB.execute(OpExecutorTDB.java:152)
> at
> com.hp.hpl.jena.sparql.engine.main.ExecutionDispatch.visit(ExecutionDispatch.java:63)
> at
> com.hp.hpl.jena.sparql.algebra.op.OpQuadPattern.visit(OpQuadPattern.java:97)
> at
> com.hp.hpl.jena.sparql.engine.main.ExecutionDispatch.exec(ExecutionDispatch.java:43)
> at
> com.hp.hpl.jena.sparql.engine.main.OpExecutor.executeOp(OpExecutor.java:119)
> at
> com.hp.hpl.jena.sparql.engine.main.OpExecutor.execute(OpExecutor.java:208)
> at
> com.hp.hpl.jena.sparql.engine.main.ExecutionDispatch.visit(ExecutionDispatch.java:105)
> at
> com.hp.hpl.jena.sparql.algebra.op.OpSequence.visit(OpSequence.java:73)
> at
> com.hp.hpl.jena.sparql.engine.main.ExecutionDispatch.exec(ExecutionDispatch.java:45)
> at
> com.hp.hpl.jena.sparql.engine.main.OpExecutor.executeOp(OpExecutor.java:119)
> at
> com.hp.hpl.jena.sparql.engine.main.OpExecutor.execute(OpExecutor.java:464)
> at
> com.hp.hpl.jena.sparql.engine.main.ExecutionDispatch.visit(ExecutionDispatch.java:246)
> at com.hp.hpl.jena.sparql.algebra.op.OpAssign.visit(OpAssign.java:116)
> at
> com.hp.hpl.jena.sparql.engine.main.ExecutionDispatch.exec(ExecutionDispatch.java:45)
> at
> com.hp.hpl.jena.sparql.engine.main.OpExecutor.executeOp(OpExecutor.java:119)
> at
> com.hp.hpl.jena.sparql.engine.main.OpExecutor.execute(OpExecutor.java:92)
> at com.hp.hpl.jena.sparql.engine.main.QC.execute(QC.java:52)
> at
> com.hp.hpl.jena.sparql.engine.main.iterator.QueryIterUnion.nextStage(QueryIterUnion.java:55)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage(QueryIterRepeatApply.java:113)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:65)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterConvert.hasNextBinding(QueryIterConvert.java:65)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterSlice.hasNextBinding(QueryIterSlice.java:76)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:107)
> at
> com.hp.hpl.jena.sparql.engine.ResultSetStream.hasNext(ResultSetStream.java:70)
> at
> com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execDescribe(QueryExecutionBase.java:278)
> at
> com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execDescribe(QueryExecutionBase.java:256)
> <snip>
> DataSetReadActivity: 1249ms
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