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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2014/05/10 23:56:27 UTC
[jira] [Commented] (LUCENE-5658) IllegalArgumentException from
ByteBufferIndexInput.buildSlice
[ https://issues.apache.org/jira/browse/LUCENE-5658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13993677#comment-13993677 ]
Robert Muir commented on LUCENE-5658:
-------------------------------------
{quote}
This does not use NIOFSDir! open() is a static factory method on FSDirectory, just inherited to NIOFSDirectory.
{quote}
I think this is confusing in the API. I opened LUCENE-5663
> IllegalArgumentException from ByteBufferIndexInput.buildSlice
> -------------------------------------------------------------
>
> Key: LUCENE-5658
> URL: https://issues.apache.org/jira/browse/LUCENE-5658
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/store
> Affects Versions: 4.8
> Reporter: Shai Erera
>
> I've received an email with the following stacktrace:
> {noformat}
> Exception in thread "Lucene Merge Thread #73" org.apache.lucene.index.MergePolicy$MergeException: java.lang.IllegalArgumentException
> at org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:545)
> at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:518)
> Caused by: java.lang.IllegalArgumentException
> at java.nio.Buffer.limit(Buffer.java:278)
> at org.apache.lucene.store.ByteBufferIndexInput.buildSlice(ByteBufferIndexInput.java:259)
> at org.apache.lucene.store.ByteBufferIndexInput.buildSlice(ByteBufferIndexInput.java:230)
> at org.apache.lucene.store.ByteBufferIndexInput.clone(ByteBufferIndexInput.java:187)
> at org.apache.lucene.store.MMapDirectory$1.openFullSlice(MMapDirectory.java:211)
> at org.apache.lucene.store.CompoundFileDirectory.readEntries(CompoundFileDirectory.java:138)
> at org.apache.lucene.store.CompoundFileDirectory.<init>(CompoundFileDirectory.java:105)
> at org.apache.lucene.index.SegmentReader.readFieldInfos(SegmentReader.java:209)
> at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:99)
> at org.apache.lucene.index.ReadersAndUpdates.getReader(ReadersAndUpdates.java:142)
> at org.apache.lucene.index.ReadersAndUpdates.getReaderForMerge(ReadersAndUpdates.java:624)
> at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4068)
> at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3728)
> at org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:405)
> at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:482)
> {noformat}
> According to the email, it happens randomly while indexing Wikipedia, on 4.8.0. As far as I understood, the indexer creates 4 indexes in parallel, by a total of 48 threads. Each index is created in a separate directory, and there's no sharing of MP or MS instances between the writers (in fact, default settings are used). This could explain the {{Lucene Merge Thread #73}}. The indexing process ends w/ a {{forceMerge(1)}}. If that call is omitted, the exception doesn't reproduce. Also, since it doesn't happen always, there's no simple testcase which reproduces.
> I've asked the reporter to add more info to the issue, but opening the issue now so we could check and hopefully fix before 4.8.1.
> I checked the stacktrace against trunk, but not all the lines align (e.g. {{at org.apache.lucene.store.MMapDirectory$1.openFullSlice(MMapDirectory.java:211)}} is only in 4.8), but I haven't dug deeper yet...
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