Github user ramkrish86 commented on the issue:
https://github.com/apache/flink/pull/3149
I think that is not the only reason. Some where either these tests are
creating more static objects or bigger objects that live for the life time of
the JVM. May be this test exposes it. Actually this change in maxPermsize calls
for a discussion on how the 'mvn' settings should be and what is the minimum
size of heap required. Also in other projects the default jdk version is now
moved to 8 atleast for the trunk version. I think similar thing can be done
here. Thanks @tonycox .
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