Tibor17 commented on issue #231: Failsafe: Killing self fork JVM. PING timeout 
elapsed.
URL: https://github.com/apache/maven-surefire/pull/231#issuecomment-485878074
 
 
   @shark-horse 
   The parent process won't be 100% bulletproof. The Heap grows slowly with 
small memory increments because there is only test statistics of a test class 
kept in memory, and logs are flushed to the file system and not kept (buffer 
size of 1 MB per test case).
   The worst is when the old parallel GC algorithm reclaims e.g. 12 GB 
sporadically. The question is how long it would take - max 30 seconds.

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