Github user shijinkui commented on the issue: https://github.com/apache/flink/pull/3190 " /tmp/cacheFile (Permission denied)" exception of unit test can be replay. 1. on linux env, `sudo - userA`, clone the flink code, start to `mvn clean test verify` 2. on the linux machine, `sudo - userB`, clone the flink codebase, same start to `mvn clean test verify` Because two use share the same `/tmp` directory which have no random sub directory. IMO, `/tmp` change to `${project.build.directory}`, at same time have random suffix. This can resolve the problem thoroughly.
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