Michael McCandless created LUCENE-9083:
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Summary: TestIOUtils false failures on ARM Linux due to
StackOverflowError
Key: LUCENE-9083
URL: https://issues.apache.org/jira/browse/LUCENE-9083
Project: Lucene - Core
Issue Type: Improvement
Components: core/store
Affects Versions: master (9.0)
Reporter: Michael McCandless
I'm testing Lucene's performance on the new
[Graviton2|https://aws.amazon.com/about-aws/whats-new/2019/12/announcing-new-amazon-ec2-m6g-c6g-and-r6g-instances-powered-by-next-generation-arm-based-aws-graviton2-processors]
ARM EC2 instances, specifically on an {{m6g.8xlarge}} instance.
But several test cases in {{TestIOUtils}} failed due to {{StackOverflowError}},
e.g.:
{noformat}
[junit4] <JUnit4> says aloha! Master seed: 7AF4595BAD680884
[junit4] Executing 1 suite with 1 JVM.
[junit4]
[junit4] Started J0 PID(28011@localhost).
[junit4] Suite: org.apache.lucene.util.TestIOUtils
[junit4] OK 0.03s | TestIOUtils.testDeleteFileIgnoringExceptions
[junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestIOUtils
-Dtests.method=testRotatingPlatters -Dtests.seed=7AF4595BAD680884
-Dtests.slow=true -Dtests.badapples=true -D\
tests.locale=lu -Dtests.timezone=America/Lower_Princes -Dtests.asserts=true
-Dtests.file.encoding=US-ASCII
[junit4] ERROR 65.1s | TestIOUtils.testRotatingPlatters <<<
[junit4] > Throwable #1: java.lang.StackOverflowError
[junit4] > at
__randomizedtesting.SeedInfo.seed([7AF4595BAD680884:ADC8742ECA7CAFC1]:0)
[junit4] > at
java.base/sun.nio.cs.UTF_8$Encoder.encodeLoop(UTF_8.java:564)
[junit4] > at
java.base/java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:576)
[junit4] > at
java.base/sun.nio.fs.UnixPath.encode(UnixPath.java:136)
[junit4] > at
java.base/sun.nio.fs.UnixPath.<init>(UnixPath.java:69)
[junit4] > at
java.base/sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:280)
[junit4] > at
java.base/java.nio.file.Path.startsWith(Path.java:379)
[junit4] > at
org.apache.lucene.mockfile.FilterPath.startsWith(FilterPath.java:130)
[junit4] > at
org.apache.lucene.util.TestIOUtils$MockLinuxFileSystemProvider.maybeChroot(TestIOUtils.java:246)
[junit4] > at
org.apache.lucene.util.TestIOUtils$MockLinuxFileSystemProvider$MockLinuxPath.toRealPath(TestIOUtils.java:266)
[junit4] > at
org.apache.lucene.util.TestIOUtils$MockLinuxFileSystemProvider$MockLinuxPath.toRealPath(TestIOUtils.java:270)
[junit4] > at
org.apache.lucene.util.TestIOUtils$MockLinuxFileSystemProvider$MockLinuxPath.toRealPath(TestIOUtils.java:270)
[junit4] > at
org.apache.lucene.util.TestIOUtils$MockLinuxFileSystemProvider$MockLinuxPath.toRealPath(TestIOUtils.java:270)
{noformat}
Also, I've installed Lucene on {{tmpfs}} ({{/dev/shm}}), and maybe that (and
not ARM Linux) is to blame? Maybe it's just a silly bug in the
{{MockLinuxPath}} in {{TestIOUtils.java}} .. it calls {{maybeChroot}} which
looks to special case any path starting with {{/dev}} ... I'll try Lucene on
{{/dev/shm}} on an x64 Linux to see ... all other core tests seem to pass at
least once!
I'm using OpenJDK11 build from https://adoptopenjdk.net
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