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Posted to dev@jena.apache.org by "Andy Seaborne (JIRA)" <ji...@apache.org> on 2012/08/30 23:26:08 UTC
[jira] [Closed] (JENA-308) Index corruption after killing process
[ https://issues.apache.org/jira/browse/JENA-308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andy Seaborne closed JENA-308.
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> Index corruption after killing process
> --------------------------------------
>
> Key: JENA-308
> URL: https://issues.apache.org/jira/browse/JENA-308
> Project: Apache Jena
> Issue Type: Bug
> Components: TDB
> Affects Versions: TDB 0.9.1, TDB 0.9.4
> Environment: Windows 2008/7 (64 bit) both on IBM and SUN JVM 6. Direct mode
> Reporter: Simon Helsen
> Assignee: Andy Seaborne
> Priority: Critical
> Fix For: TDB 0.9.4
>
> Attachments: journalRecoveryTest.zip
>
>
> We are faced with a series of possible exceptions which may or may not occur after an active tdb store is killed. The most common exception has the form:
> Exception in thread "Thread-3" com.hp.hpl.jena.tdb.transaction.TDBTransactionException: Feaild to read block checksum.
> at com.hp.hpl.jena.tdb.transaction.Journal._read(Journal.java:238)
> at com.hp.hpl.jena.tdb.transaction.Journal._readJournal(Journal.java:197)
> at com.hp.hpl.jena.tdb.transaction.Journal.access$1(Journal.java:192)
> at com.hp.hpl.jena.tdb.transaction.Journal$IteratorEntries.moveToNext(Journal.java:267)
> at com.hp.hpl.jena.tdb.transaction.Journal$IteratorEntries.moveToNext(Journal.java:1)
> at org.openjena.atlas.iterator.IteratorSlotted.hasNext(IteratorSlotted.java:67)
> at com.hp.hpl.jena.tdb.transaction.JournalControl.scanForCommit(JournalControl.java:148)
> at com.hp.hpl.jena.tdb.transaction.JournalControl.recoverFromJournal(JournalControl.java:127)
> at com.hp.hpl.jena.tdb.StoreConnection._makeAndCache(StoreConnection.java:234)
> at com.hp.hpl.jena.tdb.StoreConnection.make(StoreConnection.java:214)
> at com.hp.hpl.jena.tdb.transaction.DatasetGraphTransaction.<init>(DatasetGraphTransaction.java:76)
> at com.hp.hpl.jena.tdb.sys.TDBMaker._create(TDBMaker.java:57)
> at com.hp.hpl.jena.tdb.sys.TDBMaker.createDatasetGraphTransaction(TDBMaker.java:45)
> at com.hp.hpl.jena.tdb.TDBFactory._createDatasetGraph(TDBFactory.java:104)
> at com.hp.hpl.jena.tdb.TDBFactory.createDatasetGraph(TDBFactory.java:73)
> at com.hp.hpl.jena.tdb.TDBFactory.createDataset(TDBFactory.java:52)
> Other exceptions are possible (see comments below). I have been able to produce a standalone java program/test case which simulates a process kill and is able to produce the exception after a non-deterministic time. It runs an iteration until it hits one of the possible problems. Sometimes, an exception hits after just 2 iterations, other times, it can take 40 runs or more before hitting a problem. Because I don't know what the cause is here, I have not been able to make the test case more specific
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