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https://issues.apache.org/jira/browse/LUCENE-7032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15150748#comment-15150748
]
Robert Muir commented on LUCENE-7032:
-------------------------------------
Thanks dawid, I optimized test parameters further and experimented with your
suggestions.
It now fails 100% reproducible for me with a single test method invocation on
my linux machine (4 seconds):
{noformat}
rmuir@beast:~/workspace/lucene-solr/lucene/core$ ant test
-Dtestcase=TestMinimize -Dtests.method="testBasic*"
-Dtests.seed=5E1BF6106DCA9EC9 -Dargs="-XX:-TieredCompilation -Xbatch"
<<< anting >>>
-test:
[junit4:pickseed] Seed property 'tests.seed' already defined: 5E1BF6106DCA9EC9
[junit4] <JUnit4> says g'day! Master seed: 5E1BF6106DCA9EC9
[junit4] Executing 1 suite with 1 JVM.
[junit4]
[junit4] Started J0 PID(5919@localhost).
[junit4] Suite: org.apache.lucene.util.automaton.TestMinimize
[junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestMinimize
-Dtests.method=testBasic -Dtests.seed=5E1BF6106DCA9EC9 -Dtests.locale=fr-GF
-Dtests.timezone=Africa/Khartoum -Dtests.asserts=true
-Dtests.file.encoding=UTF-8
[junit4] ERROR 0.59s | TestMinimize.testBasic <<<
[junit4] > Throwable #1: java.lang.IllegalArgumentException: source=3 is
out of bounds (maxState is 2)
[junit4] > at
__randomizedtesting.SeedInfo.seed([5E1BF6106DCA9EC9:F5E1EB05B21618E7]:0)
[junit4] > at
org.apache.lucene.util.automaton.Automaton.addTransition(Automaton.java:165)
[junit4] > at
org.apache.lucene.util.automaton.MinimizationOperations.minimize(MinimizationOperations.java:245)
[junit4] > at
org.apache.lucene.util.automaton.RegExp.toAutomatonInternal(RegExp.java:537)
[junit4] > at
org.apache.lucene.util.automaton.RegExp.findLeaves(RegExp.java:617)
[junit4] > at
org.apache.lucene.util.automaton.RegExp.toAutomatonInternal(RegExp.java:519)
[junit4] > at
org.apache.lucene.util.automaton.RegExp.toAutomaton(RegExp.java:495)
[junit4] > at
org.apache.lucene.util.automaton.RegExp.toAutomaton(RegExp.java:426)
[junit4] > at
org.apache.lucene.util.automaton.AutomatonTestUtil.randomSingleAutomaton(AutomatonTestUtil.java:262)
[junit4] > at
org.apache.lucene.util.automaton.AutomatonTestUtil.randomAutomaton(AutomatonTestUtil.java:276)
[junit4] > at
org.apache.lucene.util.automaton.TestMinimize.testBasic(TestMinimize.java:30)
[junit4] > at java.lang.Thread.run(Thread.java:804)
[junit4] 2> NOTE: test params are: codec=Asserting(Lucene60): {},
docValues:{}, sim=RandomSimilarity(queryNorm=true,coord=no): {}, locale=fr-GF,
timezone=Africa/Khartoum
[junit4] 2> NOTE: Linux 4.2.0-25-generic amd64/Oracle Corporation 9-ea
(64-bit)/cpus=8,threads=1,free=162224128,total=197132288
[junit4] 2> NOTE: All tests run in this JVM: [TestMinimize]
[junit4] Completed [1/1 (1!)] in 1.69s, 1 test, 1 error <<< FAILURES!
[junit4]
[junit4]
[junit4] Tests with failures [seed: 5E1BF6106DCA9EC9]:
[junit4] - org.apache.lucene.util.automaton.TestMinimize.testBasic
[junit4]
[junit4]
[junit4] JVM J0: 0.58 .. 2.96 = 2.38s
[junit4] Execution time total: 2.98 sec.
[junit4] Tests summary: 1 suite, 1 test, 1 error
BUILD FAILED
/home/rmuir/workspace/lucene-solr/lucene/common-build.xml:1457: The following
error occurred while executing this line:
/home/rmuir/workspace/lucene-solr/lucene/common-build.xml:1014: There were test
failures: 1 suite, 1 test, 1 error [seed: 5E1BF6106DCA9EC9]
Total time: 4 seconds
{noformat}
Now, to think about how to boil it down from here.
> jdk-9-ea+105 breaks MinimizeOperations.minimize()
> -------------------------------------------------
>
> Key: LUCENE-7032
> URL: https://issues.apache.org/jira/browse/LUCENE-7032
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
>
> As soon as jdk-9-ea+105 was put into test rotation, automaton tests have been
> sporatically failing in non-reproducible ways. All of them invoke hopcroft
> minimization either directly or indirectly.
> The bug manifests in several forms:
> * ArrayIndexOutOfBoundsException in minimize()
> * IllegalArgumentException for an explicit bounds check
> * incorrect resulting automaton
> This method is ... let's say not the ideal one to debug something like this,
> but I've at least got it where I can make it fail in a few minutes with
> beasting, so we can try simple things like turning on/off jvm flags to try to
> narrow it more.
> It would be really great to make it fail more efficiently, but unfortunately
> it takes many thousands of iterations until we understand more about it.
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