You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@jena.apache.org by "Paolo Castagna (Commented) (JIRA)" <ji...@apache.org> on 2011/11/17 16:00:55 UTC
[jira] [Commented] (JENA-143) QueryExecution.abort seems to corrupt
TDB when interrupting transactional queries
[ https://issues.apache.org/jira/browse/JENA-143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13152086#comment-13152086 ]
Paolo Castagna commented on JENA-143:
-------------------------------------
Hi Simon, I experience same issue, however I still do not understand what's causing it.
START (disk[direct], 1000 iterations)
000: . CS CS CS CD CD CD . CS CS CD CD CD CD CD CD CD CD ......... CS .. CS CD CS .. CS . CS .... CS CS . CS . CD .. CS .. CS .. CS CS .. CS .. [...]
800: ........ CS . CS .. CS .. CS .... CS ................... CS .. CS ... CS . CS ........... CS . CS ........ CS CS ...... CS com.hp.hpl.jena.tdb.TDBException: Different ids for S: allocated: expected [000000000000000E], got [0000000000000000]
at com.hp.hpl.jena.tdb.transaction.NodeTableTrans.append(NodeTableTrans.java:178)
at com.hp.hpl.jena.tdb.transaction.NodeTableTrans.writeNodeJournal(NodeTableTrans.java:210)
at com.hp.hpl.jena.tdb.transaction.NodeTableTrans.commitPrepare(NodeTableTrans.java:190)
at com.hp.hpl.jena.tdb.transaction.Transaction.prepare(Transaction.java:108)
at com.hp.hpl.jena.tdb.transaction.Transaction.commit(Transaction.java:92)
at com.hp.hpl.jena.tdb.DatasetGraphTxn.commit(DatasetGraphTxn.java:41)
at com.hp.hpl.jena.tdb.transaction.T_TransSystem$Writer.call(T_TransSystem.java:301)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
> QueryExecution.abort seems to corrupt TDB when interrupting transactional queries
> ---------------------------------------------------------------------------------
>
> Key: JENA-143
> URL: https://issues.apache.org/jira/browse/JENA-143
> Project: Jena
> Issue Type: Bug
> Components: TDB
> Environment: tdb-0.9.0-20111010.121635
> Reporter: Simon Helsen
> Attachments: T_TransSystem_patchedForJena143.txt
>
>
> The interaction between queryExecution.abort() and TDB transactions seems to suffer from a problem. When I use it, it seems that the store corrupts again. Note that when the QueryCancellationException is thrown, I actively abort the DatasetGraphTxn object, but I am seeing
> 14:59:20,580 [477961341@qtp-1709008349-8] WARN hpl.jena.sparql.engine.iterator.QueryIteratorCheck - Open iterator: QueryIterFilterExpr/37159
> and then shortly after:
> 15:00:34,691 [jazz.jfs.indexer.jfs_tests_default_consumer_name.triple] ERROR com.ibm.team.jfs - Originating Exception:
> com.hp.hpl.jena.tdb.base.file.FileException: ObjectFile.read(8072)[12980][12980]: Impossibly large object : 1936010863 bytes
> at com.hp.hpl.jena.tdb.base.objectfile.ObjectFileStorage.read(ObjectFileStorage.java:294)
> at com.hp.hpl.jena.tdb.base.objectfile.ObjectFileStorage$ObjectIterator.next(ObjectFileStorage.java:409)
> This is the used coding pattern. The main thread just sets up the transaction, so, something like this:
> DatasetGraphTxn dsGraph = null;
> try {
> dsGraph = StoreConnection.make(this.location).begin(ReadWrite.READ);
> Dataset ds = dsGraph.toDataset();
>
> ...
> QueryExecution qe = null;
> ...
> try {
> results = qe.execSelect();
> ...
> } finally {
> if (qe != null) {
> qe.close();
> }
> }
> } catch (QueryCancelledException e) {
> if (dsGraph != null) {
> dsGraph.abort();
> }
> } finally {
> if (dsGraph != null) {
> dsGraph.close();
> }
> }
> A parallel thread may decide that the given query needs to be cancelled, so it has access to the QueryExecution and may decide to call
> this.queryExecution.abort();
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira