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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2018/03/27 14:27:00 UTC
[jira] [Commented] (LUCENE-8222) TestICUTokenizerCJK failure
[ https://issues.apache.org/jira/browse/LUCENE-8222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16415710#comment-16415710 ]
Adrien Grand commented on LUCENE-8222:
--------------------------------------
This seems to be a bug in ICU4J. For instance the following example creates a similar issue. I sent an email to the icu-support mailing-list to ask what they think about it.
{code}
String t = "口訣 ーデキモサラェレョ゠イ ゠h";
BreakIterator it = BreakIterator.getWordInstance(ULocale.ROOT);
it.setText(t);
List<Integer> boundaries = new ArrayList<>();
for (int i = it.next(); i != BreakIterator.DONE; i = it.next()) {
boundaries.add(i);
}
it.setText(t);
List<Integer> boundaries2 = new ArrayList<>();
for (int i = it.next(); i != BreakIterator.DONE; i = it.next()) {
boundaries2.add(i);
}
System.out.println(boundaries);
System.out.println(boundaries2);
{code}
which prints
{noformat}
[2, 3, 4, 5, 7, 9, 10, 11, 14, 15, 16, 17]
[2, 3, 14, 15, 16, 17]
{noformat}
The issue is that RuleBasedBreakIterator keeps a cache of the language break engines to use depending on the next character, and character {{゠}} expands the set of characters that the "unhandled" engine covers, which ends up making RuleBasedBreakIterator use a this unhandled break engine for {{ー}} in the second run, while it used the cjk break engine in the first run.
> TestICUTokenizerCJK failure
> ---------------------------
>
> Key: LUCENE-8222
> URL: https://issues.apache.org/jira/browse/LUCENE-8222
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Alan Woodward
> Priority: Major
>
> This reproduces for me:
> {code:java}
> [junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestICUTokenizerCJK -Dtests.method=testRandomHugeStrings -Dtests.seed=2C1F4414ECB02FE4 -Dtests.slow=true -Dtests.badapples=true -Dtests.locale=pl-PL -Dtests.timezone=Europe/Athens -Dtests.asserts=true -Dtests.file.encoding=US-ASCII
> [junit4] FAILURE 0.57s | TestICUTokenizerCJK.testRandomHugeStrings <<<
> [junit4] > Throwable #1: org.junit.ComparisonFailure: term 128 expected:<ー[]> but was:<ー[デ]>
> [junit4] > at __randomizedtesting.SeedInfo.seed([2C1F4414ECB02FE4:B43C23D7B2C693AC]:0)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.assertTokenStreamContents(BaseTokenStreamTestCase.java:201)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.assertTokenStreamContents(BaseTokenStreamTestCase.java:325)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.assertTokenStreamContents(BaseTokenStreamTestCase.java:329)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.checkAnalysisConsistency(BaseTokenStreamTestCase.java:869)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:668)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:566)
> [junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:479)
> [junit4] > at org.apache.lucene.analysis.icu.segmentation.TestICUTokenizerCJK.testRandomHugeStrings(TestICUTokenizerCJK.java:107)
> [junit4] > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> [junit4] > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> [junit4] > at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> [junit4] > at java.base/java.lang.reflect.Method.invoke(Method.java:564)
> [junit4] > at java.base/java.lang.Thread.run(Thread.java:844)
> [junit4] 2> NOTE: test params are: codec=Asserting(Lucene70): {dummy=PostingsFormat(name=LuceneVarGapDocFreqInterval)}, docValues:{}, maxPointsInLeafNode=1800, maxMBSortInHeap=7.290162896982681, sim=Asserting(org.apache.lucene.search.similarities.AssertingSimilarity@3f70f3d9), locale=pl-PL, timezone=Europe/Athens
> [junit4] 2> NOTE: Mac OS X 10.13.3 x86_64/Oracle Corporation 9.0.1 (64-bit)/cpus=8,threads=1,free=150530048,total=268435456{code}
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