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List:       lucene-dev
Subject:    SIGSEGV with Lucene 9.9.0
From:       Chris Hegarty <christopher.hegarty () elastic ! co ! INVALID>
Date:       2023-12-06 18:12:30
Message-ID: 9D659A69-11CE-4A55-8293-DFCA416B063A () elastic ! co
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Hi,

I want to raise awareness of a JVM crash that has been tickled by the Lucene 9.9.0 \
release. I don't have all the answers (yet), but I just want to ensure that folk here \
are aware. Details in this Elasticsearch issue [1]

# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f57de17ef0e, pid=9600, tid=48393
#
# JRE version: OpenJDK Runtime Environment (21.0.1+12) (build 21.0.1+12-29)
# Java VM: OpenJDK 64-Bit Server VM (21.0.1+12-29, mixed mode, sharing, tiered, \
compressed oops, compressed class ptrs, g1 gc, linux-amd64) # Problematic frame:
# V [libjvm.so+0xb93f0e] PhaseIdealLoop::build_loop_late_post_work(Node*, bool)+0xce
#

I dunno why we've not seen this before, but it reproduces quite frequently with a \
particular Elasticsearch test.

Offending methods:
-XX:CompileCommand=exclude,org.apache.lucene.util.MSBRadixSorter::computeCommonPrefixLengthAndBuildHistogram \
                \
-XX:CompileCommand=exclude,org.apache.lucene.util.RadixSelector::computeCommonPrefixLengthAndBuildHistogram \
\

The issue is reproducible with JDK 19.0.2, JDK 20.0.2, JDK 21.0.1.  There is no crash \
in JDK 21.0.2 or JDK 22 (local builds of yet unreleased JDKs), but my understanding \
is that the method is just not compiled.  Investigation is ongoing in the JDK issue  \
https://bugs.openjdk.org/browse/JDK-8321370 

For reference, JDK 20.0.2 is scheduled to release on 2024-01-16.
 
-Chris.

[1] https://github.com/elastic/elasticsearch/issues/103004
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