Build failed in Jenkins: kafka-trunk-jdk7 #2919

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See <https://builds.apache.org/job/kafka-trunk-jdk7/2919/display/redirect>

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1766 tests completed, 1 failed
:streams:test FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':streams:test'.
> There were failing tests. See the report at: file://<https://builds.apache.org/job/kafka-trunk-jdk7/ws/streams/build/reports/tests/test/index.html>

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

BUILD FAILED in 1h 27m 50s
52 actionable tasks: 32 executed, 20 up-to-date
Build step 'Execute shell' marked build as failure
[FINDBUGS] Collecting findbugs analysis files...
Setting GRADLE_3_4_RC_2_HOME=/home/jenkins/jenkins-slave/tools/hudson.plugins.gradle.GradleInstallation/Gradle_3.4-rc-2
[FINDBUGS] Searching for all files in <https://builds.apache.org/job/kafka-trunk-jdk7/ws/> that match the pattern **/build/reports/findbugs/*.xml
[FINDBUGS] Parsing 5 files in <https://builds.apache.org/job/kafka-trunk-jdk7/ws/>
[FINDBUGS] Successfully parsed file <https://builds.apache.org/job/kafka-trunk-jdk7/ws/clients/build/reports/findbugs/main.xml> with 0 unique warnings and 0 duplicates.
[FINDBUGS] Successfully parsed file <https://builds.apache.org/job/kafka-trunk-jdk7/ws/core/build/reports/findbugs/main.xml> with 0 unique warnings and 0 duplicates.
[FINDBUGS] Successfully parsed file <https://builds.apache.org/job/kafka-trunk-jdk7/ws/examples/build/reports/findbugs/main.xml> with 0 unique warnings and 0 duplicates.
[FINDBUGS] Successfully parsed file <https://builds.apache.org/job/kafka-trunk-jdk7/ws/log4j-appender/build/reports/findbugs/main.xml> with 0 unique warnings and 0 duplicates.
[FINDBUGS] Successfully parsed file <https://builds.apache.org/job/kafka-trunk-jdk7/ws/streams/build/reports/findbugs/main.xml> with 0 unique warnings and 0 duplicates.
Setting GRADLE_3_4_RC_2_HOME=/home/jenkins/jenkins-slave/tools/hudson.plugins.gradle.GradleInstallation/Gradle_3.4-rc-2
Setting GRADLE_3_4_RC_2_HOME=/home/jenkins/jenkins-slave/tools/hudson.plugins.gradle.GradleInstallation/Gradle_3.4-rc-2
<Git Blamer> Using GitBlamer to create author and commit information for all warnings.
<Git Blamer> GIT_COMMIT=d3f24798f92a6e4d6038d28b63daf3ac9d14fcbf, workspace=<https://builds.apache.org/job/kafka-trunk-jdk7/ws/>
[FINDBUGS] Computing warning deltas based on reference build #2917
Recording test results
Setting GRADLE_3_4_RC_2_HOME=/home/jenkins/jenkins-slave/tools/hudson.plugins.gradle.GradleInstallation/Gradle_3.4-rc-2
Setting GRADLE_3_4_RC_2_HOME=/home/jenkins/jenkins-slave/tools/hudson.plugins.gradle.GradleInstallation/Gradle_3.4-rc-2
Not sending mail to unregistered user wangguoz@gmail.com

Jenkins build is back to normal : kafka-trunk-jdk7 #2920

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