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From "Torben Riis (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-8795) ArrayIndexOutOfBoundsException during System.arraycopy in BKDWriter
Date Tue, 07 May 2019 10:03:00 GMT
Torben Riis created LUCENE-8795:
-----------------------------------

             Summary: ArrayIndexOutOfBoundsException during System.arraycopy in BKDWriter
                 Key: LUCENE-8795
                 URL: https://issues.apache.org/jira/browse/LUCENE-8795
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/index
    Affects Versions: 6.6
         Environment: h2. Operating system/Platform
{code:java}
IBM i - V7R3M0
{code}

h2. Java version

{code:java}
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 8.0.5.25 - pap6480sr5fp25-20181030_01(SR5 FP25))
IBM J9 VM (build 2.9, JRE 1.8.0 OS/400 ppc64-64-Bit Compressed References 20181029_400846
(JIT enabled, AOT enabled)
OpenJ9   - c5c78da
OMR      - 3d5ac33
IBM      - 8c1bdc2)
JCL - 20181022_01 based on Oracle jdk8u191-b26
NOTICE: If no version information is found above, this could indicate a corrupted Java installation!
Java detected was: /QOpenSys/QIBM/ProdData/JavaVM/jdk80/64bit/bin/java
-Dmultiarchive.basepath=/home/NEXTOWN/Multi-Support/Next -Xms128m -Xmx2048m
{code}
            Reporter: Torben Riis


Hi,

I’m a bit stuck here and needs a clue or two in order to continue our investigations. Hope
that someone can help. :)

Periodically, around once a month, we get the below {{ArrayIndexOutOfBoundsException}} on
our system. We use multiple indexes and the error can originate from any of them, but the
error always occurs in line 1217 in {{BKDWriter}} (during a {{System.arraycopy}}).

We found a couple of issues on the net regarding JIT optimization problem related to J9, but
they all looks like they have been resolved and cannot be reproduced anymore. But nevertheless,
we have added the following {{-Xjit}} flags to excludes JIT optimization for every class
/ inner classes in the {{bkd}} package. Moreover, we have also made a complete copy of the
whole installation in production, and added the opposite arguments (enforce JIT optimizations
for the specific classes). First we will try with {{optLevel=hot}}, but if this doesn’t
show anything we will afterwards try with {{veryHot}} and {{scorching}}. Unfortunately we
do not have the result of this yet, but I’ll of course post it when it is known.

Unfortunately it’s not possible to run OpenJDK on the IBM i platform, so such a test will
not be possible, but it is worth mentioning that our product is a standard product, which
typically run on the Windows or Linux platform using AdoptOpenJDK. Currently we have a couple
of hundred installations running out there on these platforms, and without any problems. But
on the IBM I platform with J9 we sometimes see this exception.

Any good ideas for further investigations? Or have seen such issue before?

We are using Lucene 6.6.0 and runs on IBM J9 on the IBM I platform.
h2.  Stacktrace
{code:java}
Exception in thread "Lucene Merge Thread #0" 2019-05-01T06:10:07.970 CEST [Lucene Merge Thread
#0] org.apache.lucene.index.MergePolicy$MergeException: java.lang.ArrayIndexOutOfBoundsException
            at org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:703)
            at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:683)
Caused by: 2019-05-01T06:10:07.971 CEST [Lucene Merge Thread #0] java.lang.ArrayIndexOutOfBoundsException
            at org.apache.lucene.util.bkd.BKDWriter.recursePackIndex(BKDWriter.java:1217)
            at org.apache.lucene.util.bkd.BKDWriter.recursePackIndex(BKDWriter.java:1197)
            at org.apache.lucene.util.bkd.BKDWriter.packIndex(BKDWriter.java:1078)
            at org.apache.lucene.util.bkd.BKDWriter.writeIndex(BKDWriter.java:1245)
            at org.apache.lucene.util.bkd.BKDWriter.access$600(BKDWriter.java:82)
            at org.apache.lucene.util.bkd.BKDWriter$OneDimensionBKDWriter.finish(BKDWriter.java:648)
            at org.apache.lucene.util.bkd.BKDWriter.merge(BKDWriter.java:560)
            at org.apache.lucene.codecs.lucene60.Lucene60PointsWriter.merge(Lucene60PointsWriter.java:212)
            at org.apache.lucene.index.SegmentMerger.mergePoints(SegmentMerger.java:173)
            at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:122)
            at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4356)
            at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3931)
            at org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:624)
            at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:661)
Exception in thread "Lucene Merge Thread #0" 2019-05-01T06:10:08.075 CEST [Lucene Merge Thread
#0] org.apache.lucene.index.MergePolicy$MergeException: java.lang.ArrayIndexOutOfBoundsException
            at org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:703)
            at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:683)
Caused by: 2019-05-01T06:10:08.076 CEST [Lucene Merge Thread #0] java.lang.ArrayIndexOutOfBoundsException
            at org.apache.lucene.util.bkd.BKDWriter.recursePackIndex(BKDWriter.java:1217)
            at org.apache.lucene.util.bkd.BKDWriter.recursePackIndex(BKDWriter.java:1197)
            at org.apache.lucene.util.bkd.BKDWriter.packIndex(BKDWriter.java:1078)
            at org.apache.lucene.util.bkd.BKDWriter.writeIndex(BKDWriter.java:1245)
            at org.apache.lucene.util.bkd.BKDWriter.access$600(BKDWriter.java:82)
            at org.apache.lucene.util.bkd.BKDWriter$OneDimensionBKDWriter.finish(BKDWriter.java:648)
            at org.apache.lucene.util.bkd.BKDWriter.merge(BKDWriter.java:560)
            at org.apache.lucene.codecs.lucene60.Lucene60PointsWriter.merge(Lucene60PointsWriter.java:212)
            at org.apache.lucene.index.SegmentMerger.mergePoints(SegmentMerger.java:173)
            at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:122)
            at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4356)
            at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3931)
            at org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:624)
            at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler
{code}
h2. On production we have disabled jit optimization for the following classes
{code:java}
-Xjit:verbose,exclude={org/apache/lucene/util/bkd/BKDWriter.*|org/apache/lucene/util/bkd/BKDReader.*|org/apache/lucene/util/bkd/BKDReader$IndexTree.*|org/apache/lucene/util/bkd/BKDReader$IntersectState.*|org/apache/lucene/util/bkd/BKDReader$LegacyIndexTree.*|org/apache/lucene/util/bkd/BKDReader$PackedIndexTree.*|org/apache/lucene/util/bkd/BKDWriter.*|org/apache/lucene/util/bkd/BKDWriter$OneDimensionBKDWriter.*|org/apache/lucene/util/bkd/BKDWriter$MergeReader.*|org/apache/lucene/util/bkd/BKDWriter$BKDMergeQueue.*|org/apache/lucene/util/bkd/BKDWriter$PathSlice.*|org/apache/lucene/util/bkd/DocIdsWriter.*|org/apache/lucene/util/bkd/HeapPointReader.*|org/apache/lucene/util/bkd/HeapPointWriter.*|org/apache/lucene/util/bkd/MutablePointsReaderUtils.*|org/apache/lucene/util/bkd/OfflinePointReader.*|org/apache/lucene/util/bkd/OfflinePointWriter.*|org/apache/lucene/util/bkd/PointReader.*|org/apache/lucene/util/bkd/PointWriter.*},vlog=/home/nextown/multi-support/next/logs/jit
{code}
h2. On the copy of production we have enforced jit optimization with the following arguments
{code:java}
-Xjit:{org/apache/lucene/util/bkd/BKDWriter.*|org/apache/lucene/util/bkd/BKDReader.*|org/apache/lucene/util/bkd/BKDReader$IndexTree.*|org/apache/lucene/util/bkd/BKDReader$IntersectState.*|org/apache/lucene/util/bkd/BKDReader$LegacyIndexTree.*|org/apache/lucene/util/bkd/BKDReader$PackedIndexTree.*|org/apache/lucene/util/bkd/BKDWriter.*|org/apache/lucene/util/bkd/BKDWriter$OneDimensionBKDWriter.*|org/apache/lucene/util/bkd/BKDWriter$MergeReader.*|org/apache/lucene/util/bkd/BKDWriter$BKDMergeQueue.*|org/apache/lucene/util/bkd/BKDWriter$PathSlice.*|org/apache/lucene/util/bkd/DocIdsWriter.*|org/apache/lucene/util/bkd/HeapPointReader.*|org/apache/lucene/util/bkd/HeapPointWriter.*|org/apache/lucene/util/bkd/MutablePointsReaderUtils.*|org/apache/lucene/util/bkd/OfflinePointReader.*|org/apache/lucene/util/bkd/OfflinePointWriter.*|org/apache/lucene/util/bkd/PointReader.*|org/apache/lucene/util/bkd/PointWriter.*}(count=0,optlevel=hot)
{code}



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