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From prateek arora <prateek.arora...@gmail.com>
Subject How to enable core dump in spark
Date Wed, 01 Jun 2016 17:55:32 GMT
Hi 

I am using cloudera to  setup spark 1.6.0  on ubuntu 14.04 .

I set core dump limit to unlimited in all nodes . 
   Edit  /etc/security/limits.conf file and add  " * soft core unlimited "
line.

i rechecked  using :  $ ulimit -all

core file size          (blocks, -c) unlimited
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 241204
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 241204
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

but when I am running my spark application with some third party native
libraries . but it crashes some time and show error " Failed to write core
dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c
unlimited" before starting Java again " . 

Below are the log : 

 A fatal error has been detected by the Java Runtime Environment: 
# 
#  SIGSEGV (0xb) at pc=0x00007fd44b491fb9, pid=20458, tid=140549318547200 
# 
# JRE version: Java(TM) SE Runtime Environment (7.0_67-b01) (build
1.7.0_67-b01) 
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.65-b04 mixed mode
linux-amd64 compressed oops) 
# Problematic frame: 
# V  [libjvm.so+0x650fb9]  jni_SetByteArrayRegion+0xa9 
# 
# Failed to write core dump. Core dumps have been disabled. To enable core
dumping, try "ulimit -c unlimited" before starting Java again 
# 
# An error report file with more information is saved as: 
#
/yarn/nm/usercache/master/appcache/application_1462930975871_0004/container_1462930975871_0004_01_000066/hs_err_pid20458.log

# 
# If you would like to submit a bug report, please visit: 
#   http://bugreport.sun.com/bugreport/crash.jsp
# 


so how can i enable core dump and save it some place ? 

Regards
Prateek



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