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https://issues.apache.org/jira/browse/KAFKA-3140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15113398#comment-15113398
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ASF GitHub Bot commented on KAFKA-3140:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/805
> PatternSyntaxException thrown in MM, causes MM to hang
> ------------------------------------------------------
>
> Key: KAFKA-3140
> URL: https://issues.apache.org/jira/browse/KAFKA-3140
> Project: Kafka
> Issue Type: Bug
> Components: tools
> Reporter: Ashish K Singh
> Assignee: Ashish K Singh
> Fix For: 0.9.1.0
>
>
> On passing an invalid java regex string as whitelist to MM,
> PatternSyntaxException is thrown and MM hangs. Below is relevant ST.
> {code}
> java.util.regex.PatternSyntaxException: Dangling meta character '*' near
> index 0
> *
> ^
> at java.util.regex.Pattern.error(Pattern.java:1955)
> at java.util.regex.Pattern.sequence(Pattern.java:2123)
> at java.util.regex.Pattern.expr(Pattern.java:1996)
> at java.util.regex.Pattern.compile(Pattern.java:1696)
> at java.util.regex.Pattern.<init>(Pattern.java:1351)
> at java.util.regex.Pattern.compile(Pattern.java:1028)
> at
> kafka.tools.MirrorMaker$MirrorMakerNewConsumer.init(MirrorMaker.scala:521)
> at kafka.tools.MirrorMaker$MirrorMakerThread.run(MirrorMaker.scala:389)
> {code}
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