jiri vanek created LUCENE-7825:
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             Summary: tests relying on empty stderr
                 Key: LUCENE-7825
                 URL: https://issues.apache.org/jira/browse/LUCENE-7825
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: jiri vanek


Some of the tests are relying on empty stder.
This is very inconvenient for machines using various configurations on various 
JVMs.

Eg:
JAVA_TOOL_OPTIONS='-XX:+UseShenandoahGC '
export JAVA_TOOL_OPTIONS

then any jvm invocation (even java -version) prints to stderr
/usr/bin/java -version
Picked up JAVA_TOOL_OPTIONS: -XX:+UseShenandoahGC  

There are much more cases when stderr is used for smilar informatio, and lucene 
testsuite should be readdy for this.

Maybe for start just remove all lines staring by "Picked up" for openjdk?-)



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