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From "Cservenak, Tamas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2476) Constructor of IndexWriter let's runtime exceptions pop up, while keeping the writeLock obtained
Date Tue, 25 May 2010 16:14:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12871224#action_12871224
] 

Cservenak, Tamas commented on LUCENE-2476:
------------------------------------------

This is an UT, that 1st _copies_ a known (broken) Index files to a place, and than tries to
use it. Naturally, it fails (since the index files are corrupted), and then it tries to _recreate_
the index files and recreate the index content, but it fails to obtain the write lock again.
After patch above applied to 3.0.1, the UT does pass okay.

This is the stack trace I have with vanilla 3.0.1:

{noformat}
org.sonatype.timeline.TimelineException: Fail to configure timeline index!
	at org.sonatype.timeline.DefaultTimelineIndexer.configure(DefaultTimelineIndexer.java:106)
	at org.sonatype.timeline.DefaultTimeline.repairTimelineIndexer(DefaultTimeline.java:79)
	at org.sonatype.timeline.DefaultTimeline.configure(DefaultTimeline.java:60)
	at org.sonatype.timeline.TimelineTest.testRepairIndexCouldNotRead(TimelineTest.java:103)
	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 junit.framework.TestCase.runTest(TestCase.java:164)
	at junit.framework.TestCase.runBare(TestCase.java:130)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:120)
	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@/Users/cstamas/worx/sonatype/spice/trunk/spice-timeline/target/index/write.lock
	at org.apache.lucene.store.Lock.obtain(Lock.java:84)
	at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1045)
	at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:868)
	at org.sonatype.timeline.DefaultTimelineIndexer.configure(DefaultTimelineIndexer.java:99)
	... 19 more
{noformat}

> Constructor of IndexWriter let's runtime exceptions pop up, while keeping the writeLock
obtained
> ------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2476
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2476
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 3.0.1
>            Reporter: Cservenak, Tamas
>            Assignee: Michael McCandless
>            Priority: Blocker
>             Fix For: 3.1, 4.0
>
>         Attachments: LUCENE-2476.patch
>
>
> Constructor of IndexWriter let's runtime exceptions pop up, while keeping the writeLock
obtained.
> The init method in IndexWriter catches IOException only (I got NegativeArraySize by reading
up a _corrupt_ index), and now, there is no way to recover, since the writeLock will be kept
obtained. Moreover, I don't have IndexWriter instance either, to "grab" the lock somehow,
since the init() method is called from IndexWriter constructor.
> Either broaden the catch to all exceptions, or at least provide some circumvention to
clear up. In my case, I'd like to "fallback", just delete the corrupted index from disk and
recreate it, but it is impossible, since the LOCK_HELD NativeFSLockFactory's entry about obtained
WriteLock is _never_ cleaned out and is no (at least apparent) way to clean it out forcibly.
I can't create new IndexWriter, since it will always fail with LockObtainFailedException.

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