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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