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[Tony Reix <tony.reix@xxxxxxxx>]

Public bug reported:

$ lsb_release -rd
Description:	Ubuntu 14.04 LTS
Release:	14.04

$ uname -a
Linux tony1 3.13.0-19-generic #40-Ubuntu SMP Mon Mar 24 02:36:13 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux

$ apt-cache policy openjdk-7-jre-lib
openjdk-7-jre-lib:
  Installed: 7u51-2.4.6-1ubuntu4
  Candidate: 7u51-2.4.6-1ubuntu4
  Version table:
 *** 7u51-2.4.6-1ubuntu4 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty/universe ppc64el Packages
        100 /var/lib/dpkg/status

$ apt-cache policy openjdk-7-jre
openjdk-7-jre:
  Installed: 7u51-2.4.6-1ubuntu4
  Candidate: 7u51-2.4.6-1ubuntu4
  Version table:
 *** 7u51-2.4.6-1ubuntu4 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages
        100 /var/lib/dpkg/status

$ apt-cache policy openjdk-7-jdk
openjdk-7-jdk:
  Installed: 7u51-2.4.6-1ubuntu4
  Candidate: 7u51-2.4.6-1ubuntu4
  Version table:
 *** 7u51-2.4.6-1ubuntu4 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages
        100 /var/lib/dpkg/status


I'm running Hadoop 2.4.0 tests on Ubuntu 14.04 on PPC64-LE .
I've run about 4 times the Hadoop 2.4.0 tests and got 7 cores, 3 with Java6 (6.0_30-b30) and now 4 with Java7 (7.0_51-b31).
Before Hadoop 2.4.0 , I was testing Hadoop 2.2.0 and got only 1 core (1.7.0_51-b31) with more tests runs.
I'm compiling/testing Hadoop without Hadoop JNI code ( no -Dnative option).
I've put the ulimit at some time and got 1 (big) core file.

All five Java7 cores look the same:
- appearing in:
   hadoop-hdfs-project/hadoop-hdfs
- dealing with:
Current thread (.....):  JavaThread "FSImageSaver for :
  /home/tony/HADOOP/hadoop-2.4.0-src/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name2
  /home/tony/HADOOP/hadoop-2.4.0-src/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name1

However, the cores made different Hadoop tests to crash.
Running several times all the Hadoop tests shown that JVM crashes are random: the same elementary test may crash the JVM or run perfectly or output a Failure when run several times.


hadoop-hdfs-project/hadoop-hdfs/hs_err_pid7832.log  :

# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (os_linux_zero.cpp:254), pid=7832, tid=70365657166240
#  fatal error: caught unhandled signal 11
#
# JRE version: OpenJDK Runtime Environment (7.0_51-b31) (build 1.7.0_51-b31)
# Java VM: OpenJDK 64-Bit Zero VM (24.51-b03 interpreted mode linux-ppc64le )

---------------  T H R E A D  ---------------

Current thread (0x00003fff946fdee0):  JavaThread "FSImageSaver for
/home/tony/HADOOP/hadoop-2.4.0-src/hadoop-hdfs-project/hadoop-
hdfs/target/test/data/dfs/name1 of type IMAGE_AND_EDITS"
[_thread_in_Java, id=7843, stack(0x00003fff47e60000,0x00003fff48000000)]

Stack: [0x00003fff47e60000,0x00003fff48000000],  sp=0x00003fff47f353e0,
free space=852k

** Affects: openjdk-7 (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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which is subscribed to openjdk-7 in Ubuntu.
https://bugs.launchpad.net/bugs/1312598

Title:
  fatal error: caught unhandled signal 11

Status in “openjdk-7” package in Ubuntu:
  New

Bug description:
  $ lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  $ uname -a
  Linux tony1 3.13.0-19-generic #40-Ubuntu SMP Mon Mar 24 02:36:13 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux

  $ apt-cache policy openjdk-7-jre-lib
  openjdk-7-jre-lib:
    Installed: 7u51-2.4.6-1ubuntu4
    Candidate: 7u51-2.4.6-1ubuntu4
    Version table:
   *** 7u51-2.4.6-1ubuntu4 0
          500 http://ports.ubuntu.com/ubuntu-ports/ trusty/universe ppc64el Packages
          100 /var/lib/dpkg/status

  $ apt-cache policy openjdk-7-jre
  openjdk-7-jre:
    Installed: 7u51-2.4.6-1ubuntu4
    Candidate: 7u51-2.4.6-1ubuntu4
    Version table:
   *** 7u51-2.4.6-1ubuntu4 0
          500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages
          100 /var/lib/dpkg/status

  $ apt-cache policy openjdk-7-jdk
  openjdk-7-jdk:
    Installed: 7u51-2.4.6-1ubuntu4
    Candidate: 7u51-2.4.6-1ubuntu4
    Version table:
   *** 7u51-2.4.6-1ubuntu4 0
          500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages
          100 /var/lib/dpkg/status


  I'm running Hadoop 2.4.0 tests on Ubuntu 14.04 on PPC64-LE .
  I've run about 4 times the Hadoop 2.4.0 tests and got 7 cores, 3 with Java6 (6.0_30-b30) and now 4 with Java7 (7.0_51-b31).
  Before Hadoop 2.4.0 , I was testing Hadoop 2.2.0 and got only 1 core (1.7.0_51-b31) with more tests runs.
  I'm compiling/testing Hadoop without Hadoop JNI code ( no -Dnative option).
  I've put the ulimit at some time and got 1 (big) core file.

  All five Java7 cores look the same:
  - appearing in:
     hadoop-hdfs-project/hadoop-hdfs
  - dealing with:
  Current thread (.....):  JavaThread "FSImageSaver for :
    /home/tony/HADOOP/hadoop-2.4.0-src/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name2
    /home/tony/HADOOP/hadoop-2.4.0-src/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/name1

  However, the cores made different Hadoop tests to crash.
  Running several times all the Hadoop tests shown that JVM crashes are random: the same elementary test may crash the JVM or run perfectly or output a Failure when run several times.

  
  hadoop-hdfs-project/hadoop-hdfs/hs_err_pid7832.log  :

  # A fatal error has been detected by the Java Runtime Environment:
  #
  #  Internal Error (os_linux_zero.cpp:254), pid=7832, tid=70365657166240
  #  fatal error: caught unhandled signal 11
  #
  # JRE version: OpenJDK Runtime Environment (7.0_51-b31) (build 1.7.0_51-b31)
  # Java VM: OpenJDK 64-Bit Zero VM (24.51-b03 interpreted mode linux-ppc64le )

  ---------------  T H R E A D  ---------------

  Current thread (0x00003fff946fdee0):  JavaThread "FSImageSaver for
  /home/tony/HADOOP/hadoop-2.4.0-src/hadoop-hdfs-project/hadoop-
  hdfs/target/test/data/dfs/name1 of type IMAGE_AND_EDITS"
  [_thread_in_Java, id=7843,
  stack(0x00003fff47e60000,0x00003fff48000000)]

  Stack: [0x00003fff47e60000,0x00003fff48000000],
  sp=0x00003fff47f353e0,  free space=852k

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