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[Zahid Bukhari <1995307@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

We have many apps but I believe one app more or less does more work and
it was crashing on OpenJDK 11 on Ubuntu Bionic. We are using version
11.0.16+8-0ubuntu1~18.04.

We have perf reports, Java map files, heaps from jemalloc, Java Native
Memory Profiling (i.e. NMP) summary diffs, and SVGs from jemalloc (i.e.
jeprof).

We've been able to reliably reproduce this isse. Once we start sending
data, the app very quickly consumes all RAM. I would say a gigabyte in
about 3.5 seconds. We actually increased RAM to get to the bottom of it.
We have several apps not all of them run into the same issue but not all
of them work with the data the same way.

NMP summary diff shows Compiler, perf shows C2Compiler, and I'm a system
administrator but DevOps and Dev see it as the C2 JIT.

Since there isn't a fix in Ubuntu OpenJDK-LTS 11 we used Adoptium
11.0.16.1 and so far have not been able to replicate the issue.

https://bugs.openjdk.org/browse/JDK-8292260

** Affects: openjdk-lts (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1995307

Title:
  Running into OpenJDK 11 JIT C2 native memory leak JDK-8292260

Status in openjdk-lts package in Ubuntu:
  New

Bug description:
  We have many apps but I believe one app more or less does more work
  and it was crashing on OpenJDK 11 on Ubuntu Bionic. We are using
  version 11.0.16+8-0ubuntu1~18.04.

  We have perf reports, Java map files, heaps from jemalloc, Java Native
  Memory Profiling (i.e. NMP) summary diffs, and SVGs from jemalloc
  (i.e. jeprof).

  We've been able to reliably reproduce this isse. Once we start sending
  data, the app very quickly consumes all RAM. I would say a gigabyte in
  about 3.5 seconds. We actually increased RAM to get to the bottom of
  it. We have several apps not all of them run into the same issue but
  not all of them work with the data the same way.

  NMP summary diff shows Compiler, perf shows C2Compiler, and I'm a
  system administrator but DevOps and Dev see it as the C2 JIT.

  Since there isn't a fix in Ubuntu OpenJDK-LTS 11 we used Adoptium
  11.0.16.1 and so far have not been able to replicate the issue.

  https://bugs.openjdk.org/browse/JDK-8292260

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