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https://issues.apache.org/jira/browse/JENA-39?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12990106#comment-12990106
]
Andy Seaborne commented on JENA-39:
-----------------------------------
Application reported to have a sync thread running which was not locked against
the reading thread.
> Current modification exception with current TDB snapshot
> --------------------------------------------------------
>
> Key: JENA-39
> URL: https://issues.apache.org/jira/browse/JENA-39
> Project: Jena
> Issue Type: Bug
> Reporter: Benson Margulies
> Attachments: q.ru
>
>
> I am running with a snapshot current as of 2 Feb 2011.
> Caused by: java.util.ConcurrentModificationException: Iterator: started at
> 266529, now 266530
> at
> com.hp.hpl.jena.tdb.sys.ConcurrencyPolicyMRSW.policyError(ConcurrencyPolicyMRSW.java:127)
> at
> com.hp.hpl.jena.tdb.sys.ConcurrencyPolicyMRSW.access$000(ConcurrencyPolicyMRSW.java:18)
> at
> com.hp.hpl.jena.tdb.sys.ConcurrencyPolicyMRSW$IteratorCheckNotConcurrent.checkCourrentModification(ConcurrencyPolicyMRSW.java:90)
> at
> com.hp.hpl.jena.tdb.sys.ConcurrencyPolicyMRSW$IteratorCheckNotConcurrent.hasNext(ConcurrencyPolicyMRSW.java:97)
> at org.openjena.atlas.iterator.Iter$4.hasNext(Iter.java:262)
> at org.openjena.atlas.iterator.Iter$3.hasNext(Iter.java:152)
> at org.openjena.atlas.iterator.Iter.hasNext(Iter.java:596)
> at
> org.openjena.atlas.iterator.RepeatApplyIterator.hasNext(RepeatApplyIterator.java:46)
> at org.openjena.atlas.iterator.Iter$4.hasNext(Iter.java:262)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterPlainWrapper.hasNextBinding(QueryIterPlainWrapper.java:42)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterProcessBinding.hasNextBinding(QueryIterProcessBinding.java:48)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterConcat.hasNextBinding(QueryIterConcat.java:70)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:57)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterProcessBinding.hasNextBinding(QueryIterProcessBinding.java:48)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterDefaulting.hasNextBinding(QueryIterDefaulting.java:43)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:57)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:28)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:28)
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:66)
> at
> com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:117)
> at
> com.basistech.jug.rdfdb.jena.JenaStore.executeConstructQuery(JenaStore.java:127)
> at
> com.basistech.jug.rdfdb.jena.QueryManager.runConstructQuery(QueryManager.java:59)
> at
> com.basistech.jug.rdfdb.service.query.QueryService.constructQuery(QueryService.java:166)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:173)
> at
> org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:89)
> ... 29 more
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