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https://issues.apache.org/jira/browse/KAFKA-7009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16503377#comment-16503377
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ASF GitHub Bot commented on KAFKA-7009:
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rhauch opened a new pull request #5151: KAFKA-7009: Suppress the Reflections
log warning messages in system tests
URL: https://github.com/apache/kafka/pull/5151
This could be backported to older branches to reduce the extra log warning
messages there, too.
*More detailed description of your change,
if necessary. The PR title and PR message become
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comment to ping reviewers.*
*Summary of testing strategy (including rationale)
for the feature or bug fix. Unit and/or integration
tests are expected for any behaviour change and
system tests should be considered for larger changes.*
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> Mute logger for reflections.org at the warn level in system tests
> -----------------------------------------------------------------
>
> Key: KAFKA-7009
> URL: https://issues.apache.org/jira/browse/KAFKA-7009
> Project: Kafka
> Issue Type: Improvement
> Components: KafkaConnect, system tests
> Affects Versions: 1.1.0
> Reporter: Randall Hauch
> Assignee: Randall Hauch
> Priority: Critical
> Fix For: 2.0.0
>
>
> AK's Log4J configuration file for Connect includes [these
> lines|https://github.com/apache/kafka/blob/trunk/config/connect-log4j.properties#L25]:
> {code}
> log4j.logger.org.apache.zookeeper=ERROR
> log4j.logger.org.I0Itec.zkclient=ERROR
> log4j.logger.org.reflections=ERROR
> {code}
> The last one suppresses lots of Reflections warnings like the following that
> are output during classpath scanning and are harmless:
> {noformat}
> [2018-06-06 13:52:39,448] WARN could not create Vfs.Dir from url. ignoring
> the exception and continuing (org.reflections.Reflections)
> org.reflections.ReflectionsException: could not create Vfs.Dir from url, no
> matching UrlType was found
> [file:/usr/bin/../share/java/confluent-support-metrics/*]
> either use fromURL(final URL url, final List<UrlType> urlTypes) or use the
> static setDefaultURLTypes(final List<UrlType> urlTypes) or
> addDefaultURLTypes(UrlType urlType) with your specialized UrlType.
> at org.reflections.vfs.Vfs.fromURL(Vfs.java:109)
> at org.reflections.vfs.Vfs.fromURL(Vfs.java:91)
> at org.reflections.Reflections.scan(Reflections.java:240)
> at
> org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader$InternalReflections.scan(DelegatingClassLoader.java:373)
> at org.reflections.Reflections$1.run(Reflections.java:198)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> The last line also need to be added to [Connect's Log4J configuration file in
> the AK system
> tests|https://github.com/apache/kafka/blob/trunk/tests/kafkatest/services/templates/connect_log4j.properties.
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