Chesnay Schepler created FLINK-8070:
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Summary: 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
Fix For: 1.4.0
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
[email protected]: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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