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https://issues.apache.org/jira/browse/JENA-96?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087718#comment-13087718
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Simon Helsen commented on JENA-96:
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my last comment makes me think that the core problem is JENA-91, i.e. some sort
of strange corruption
> transactional behavior not sound
> --------------------------------
>
> Key: JENA-96
> URL: https://issues.apache.org/jira/browse/JENA-96
> Project: Jena
> Issue Type: Bug
> Components: TDB
> Environment: tx-tdb-0.9.0-20110809.130753-7
> Reporter: Simon Helsen
> Priority: Critical
>
> TDB-TX tx-tdb-0.9.0-20110809.130753-7 has transactionality issues. I am
> seeing the following stack trace:
> com.hp.hpl.jena.tdb.transaction.TDBTransactionException: Transaction has
> already committed or aborted
> at
> com.hp.hpl.jena.tdb.transaction.Transaction.abort(Transaction.java:107)
> at com.hp.hpl.jena.tdb.DatasetGraphTxn.abort(DatasetGraphTxn.java:31)
> at
> com.ibm.team.jfs.rdf.internal.jenatdbtx.JenaTdbProvider.storeOperation(JenaTdbProvider.java:208)
> at
> com.ibm.team.jfs.rdf.internal.jenatdbtx.JenaTdbProvider.replace(JenaTdbProvider.java:2411)
> at
> com.ibm.team.jfs.rdf.internal.jenatdbtx.JenaRdfService.replace(JenaRdfService.java:265)
> ... 14 more
> I use the following bit of code to execute writes:
> DatasetGraphTxn dsGraph = null;
> try {
> dsGraph = this.store.begin(ReadWrite.WRITE);
> Dataset ds = dsGraph.toDataset();
> Model m = ds.getNamedModel(graphName);
> E e = modelWriteActivity.run(m);
> dsGraph.commit();
> return e;
> } catch (Exception e) {
> if (dsGraph != null) {
> dsGraph.abort();
> }
> // TODO handle better
> throw new RuntimeException(e);
> } finally {
> if (dsGraph != null) {
> dsGraph.close();
> }
> //System.out.println("ModelWriteActivity: " +
> (System.currentTimeMillis() - t) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
> }
> The only thing I do in the ModelWriteActivity is
> model.removeAll();
> model.add(graph);
> As you can see, there is nothing in here which could have made it possible
> that the transaction has committed before. Moreover I only see this happening
> when I am executing massive concurrent reads/writes. Sequential operations do
> not expose this problem.
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