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https://issues.apache.org/jira/browse/QPID-3501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keith Wall reopened QPID-3501:
------------------------------
Assignee: Keith Wall (was: Robbie Gemmell)
My change did resolve the issue LogMonitor truncation causing sequences of NUL
bytes in the .out file, but not the duplication of parts log. I'll reopen and
submit a further change.
> LogMonitor can corrupt test logs files and cause tests subclassing
> AbstractLoggingTests to fail.
> ------------------------------------------------------------------------------------------------
>
> Key: QPID-3501
> URL: https://issues.apache.org/jira/browse/QPID-3501
> Project: Qpid
> Issue Type: Bug
> Components: Java Tests
> Reporter: Keith Wall
> Assignee: Keith Wall
> Fix For: 0.13
>
>
> On an old slow CI box, occasionally we see test failures from those tests
> subclassing AbstractLoggingTests (ChannelLoggingTests, ExchangeLoggingTest
> etc).
> For example: org.apache.qpid.server.logging.ExchangeLoggingTest fails on
> the 0-9-1 test profile with exception:
> {code}
> TestName: testDiscardedMessage Duration: 11.167
> Incorrect message expected:<...3> but was:<...1>
>
> junit.framework.ComparisonFailure: Incorrect message expected:<...3> but
> was:<...1>
> at
> org.apache.qpid.server.logging.AbstractTestLogging.validateMessageID(AbstractTestLogging.java:119)
> at
> org.apache.qpid.server.logging.ExchangeLoggingTest.testDiscardedMessage(ExchangeLoggingTest.java:249)
> at
> org.apache.qpid.test.utils.QpidBrokerTestCase.runBare(QpidBrokerTestCase.java:238)
> at org.apache.qpid.test.utils.QpidTestCase.run(QpidTestCase.java:131)
> {code}
> Analysis shows that the tests' assertions are failing because the test
> standard out file is corrupt. When the test fails, the .out file contains a
> long sequence of ASCII NULs and parts of the log are duplicated. It is the
> duplication that causes the assertion failure, as the log files contain
> incorrect numbers of operation log messages (EXH- in this case).
>
> {code}
> od -a
> TEST-org.apache.qpid.server.logging.ExchangeLoggingTest.testDiscardedMessage.out
> | head
> 0000000 nul nul nul nul nul nul nul nul nul nul nul nul nul nul nul nul
> *
> 0164000 nul nul nul nul nul nul nul nul nul nul nul nul m a i n
> 0164020 sp 2 0 1 1 - 0 9 - 2 1 sp 2 1 : 1
> {code}
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