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https://issues.apache.org/jira/browse/FLINK-8070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262279#comment-16262279
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ASF GitHub Bot commented on FLINK-8070:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/5012
> YarnTestBase should print prohibited string
> -------------------------------------------
>
> Key: FLINK-8070
> URL: https://issues.apache.org/jira/browse/FLINK-8070
> Project: Flink
> Issue Type: Improvement
> Components: Tests, YARN
> Affects Versions: 1.4.0
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
> Priority: Critical
>
> The yarn tests check the log files for a set of prohibited strings. If found,
> the entire log file is logged as WARN, the offending line is logged as ERROR,
> and the test fails with this unhelpful message:
> {code}
> java.lang.AssertionError(Found a file
> /home/travis/build/apache/flink/flink-yarn-tests/target/flink-yarn-tests-fifo/flink-yarn-tests-fifo-logDir-nm-1_0/application_1510164935122_0002/container_1510164935122_0002_01_000001/jobmanager.log
> with a prohibited string: [Exception, Started
> SelectChannelConnector@0.0.0.0:8081])
> {code}
> If you don't have log access on travis you have thus no knowledge what
> actually went wrong.
> I propose to also print smaller excerpts around the found error (like 10
> lines or smth) in the Assert.fail message.
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