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[Brian Murray <brian@xxxxxxxxxx>]

** Tags added: xenial

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https://bugs.launchpad.net/bugs/1584471

Title:
  Java threads produce OutOfMemoryError with 4.4.0-22 kernel

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hi all.

  I am running Ubuntu 16.04 (through regular updates and upgrades) on an
  HP DL380 with dual hex-core Xeon 3.47GHz cpus and 96GB RAM.

  I upgraded this system a week ago, and started getting Java
  OutOfMemoryErrors (unable to create new native thread) from Wowza
  Streaming Engine. I tried older versions of Java (7 and 6 oracle
  versions) and they improved it, but did not fix it.

  When I stopped the Wowza service from the command line, the service
  command would hang until I killed the java process.

  I booted my system into the 3.16.0-41 kernel that was still there, and
  everything works as it should (no more OutOfMemoryErrors). I have not
  tried the 3.16 kernel with Java 8 OpenJDK; it is still running on Java
  7.

  Did something change drastically with the thread modules between the
  3.16.0 kernel and the 4.4.0 kernel?

  Wowza starts Java with the -Xmx10000M option.

  One of the log entries for this error is:

  WARN    server  comment 2016-05-20      23:55:21        -       -
  -       --5405.152        -       -       -       -       -       -
  -       -       Unexpected exception.: java.lang.OutOfMemoryError:
  unable to create new native thread|at java.lang.Thread.start0(Native
  Method)|at java.lang.Thread.start(Thread.java:714)|at
  org.apache.mina.util.NewThreadExecutor.execute(NewThreadExecutor.java:34)|at
  org.apache.mina.transport.socket.nio.SocketIoProcessor.startupWorker(SocketIoProcessor.java:104)|at
  org.apache.mina.transport.socket.nio.SocketIoProcessor.addNew(SocketIoProcessor.java:83)|

  Thanks.
  Mike.

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