Toke Eskildsen created LUCENE-8628:
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Summary: ByteBuffersDirectory merge exception
Key: LUCENE-8628
URL: https://issues.apache.org/jira/browse/LUCENE-8628
Project: Lucene - Core
Issue Type: Bug
Components: core/store
Affects Versions: 7.5
Reporter: Toke Eskildsen
An exception during merge for {{ByteBufferDirectory}} was [reported on the
lucene-dev
mailinglist|https://mail-archives.apache.org/mod_mbox/lucene-dev/201812.mbox/raw/%3CCAL%3D08JvGioNvfy8xKbb7%2B999YnNnU4iQv6F6ktRkudrkr-6jGg%40mail.gmail.com%3E]:
{{Exception in thread "Lucene Merge Thread #879"
org.apache.lucene.index.MergePolicy$MergeException:
org.apache.lucene.store.AlreadyClosedException: refusing to delete any files:
this IndexWriter hit an unrecoverable exception}}{{ at
org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:705)}}{{
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:685)}}{{Caused
by: org.apache.lucene.store.AlreadyClosedException: refusing to delete any
files: this IndexWriter hit an unrecoverable exception}}{{ at
org.apache.lucene.index.IndexFileDeleter.ensureOpen(IndexFileDeleter.java:349)}}{{
at
org.apache.lucene.index.IndexFileDeleter.deleteFiles(IndexFileDeleter.java:669)}}{{
at
org.apache.lucene.index.IndexFileDeleter.deleteNewFiles(IndexFileDeleter.java:664)}}{{
at
org.apache.lucene.index.IndexWriter.deleteNewFiles(IndexWriter.java:5024)}}{{
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4539)}}{{
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4075)}}{{
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:626)}}{{
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:663)}}{{Caused
by: java.lang.IllegalArgumentException: cannot write negative vLong (got:
-4294878395)}}{{ at
org.apache.lucene.store.DataOutput.writeVLong(DataOutput.java:225)}}{{
at
org.apache.lucene.codecs.lucene50.Lucene50SkipWriter.writeSkipData(Lucene50SkipWriter.java:180)}}{{
at
org.apache.lucene.codecs.MultiLevelSkipListWriter.bufferSkip(MultiLevelSkipListWriter.java:143)}}{{
at
org.apache.lucene.codecs.lucene50.Lucene50SkipWriter.bufferSkip(Lucene50SkipWriter.java:162)}}{{
at
org.apache.lucene.codecs.lucene50.Lucene50PostingsWriter.startDoc(Lucene50PostingsWriter.java:228)}}{{
at
org.apache.lucene.codecs.PushPostingsWriterBase.writeTerm(PushPostingsWriterBase.java:148)}}{{
at
org.apache.lucene.codecs.blocktree.BlockTreeTermsWriter$TermsWriter.write(BlockTreeTermsWriter.java:865)}}{{
at
org.apache.lucene.codecs.blocktree.BlockTreeTermsWriter.write(BlockTreeTermsWriter.java:344)}}{{
at
org.apache.lucene.codecs.FieldsConsumer.merge(FieldsConsumer.java:105)}}{{
at
org.apache.lucene.codecs.perfield.PerFieldPostingsFormat$FieldsWriter.merge(PerFieldPostingsFormat.java:169)}}{{
at
org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:244)}}{{
at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:139)}}{{
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4453)}}{{
... 3 more}}
Following the trace shows no apparent problems with the
{{Lucene50SkipWripter}}. However, it uses {{getFilePointer}} to resolve the
skip lengths, which for {{ByteBuffersDirectory}} ends in
{{ByteBuffersDataOutput.size()}} with the code
{{ public long size() {}}
{{ long size = 0;}}
{{ int blockCount = blocks.size();}}
{{ if (blockCount >= 1) {}}
{{ int fullBlockSize = (blockCount - 1) * blockSize();}}
{{ int lastBlockSize = blocks.getLast().position();}}
{{ size = fullBlockSize + lastBlockSize;}}
{{ }}}
{{ return size;}}
{{ }}}
One problem here is that
{{int fullBlockSize = (blockCount - 1) * blockSize();}}
can overflow. This should be changed to something like
{{long fullBlockSize = (blockCount - 1) * (long)blockSize();}}
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