core dump

Core dump will be generated automatically if a program crashed due to segmentation fault or some other reason. But core dump will not be generated if an application halt and been terminate by control+c or conventional way of kill or pkill. 

In order to force a core dump generation you could run kill -6  

You should also make sure that you have enabled it and have provided enough space and permissions for it to get generated. 

For Linux, the coredump is turned off by default on all systems. For RedHat Advanced Server 2.1, it should be under /etc/security. There should be a self-explanatory file called limits.conf and look for the word "core". If set to "0", then coredump is disabled. 

For Solaris, you can also make sure core files are enabled with the coreadm command. 

Check ulimit -a to see whether your environment allows core files to be produced. 
ulimit -c (This is the size limit of the core file. Fix it with ulimit -c unlimited). 
Kernel limitation (hard limit for ulimit -c). 
Available disk space for the user (e.g., is there disk quota?).

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  Maheshkumar Subbaiyan if its linux, make sure core dump is set to unlimited for the user which is running the wls
  
  ulimit -c 
  
  Above command should return "unlimited" , if its returning "0" then it wont create any core dump, you can enable the core dump using below command and then bounce the wls to make it affect,
  
  ulimit -c unlimited

  March 18 at 3:07pm · Unlike 2

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  Ashish Gupta what is core dump 

  March 19 at 7:56pm · Like
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  Maheshkumar Subbaiyan when a process exits unexpectedly then it creates on core dump about why it got crashed,this is common with any process just not for java.

  March 19 at 11:36pm · Edited · Like
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  Ashish Gupta is it automatic process or we need to do something in order to generate it .. and also let us know the default location of this.

  March 19 at 11:45pm · Like
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  Maheshkumar Subbaiyan its automatic and we need to get the coredump to be set as unlimited as mentioned earlier in this psot, it gets created from the location where the process has started from.

  March 19 at 11:46pm · Like
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  Ashish Gupta ohk you mean in case of applicatoin server crash we can get this under managed server directory and also let me know the file name pattern so that i can identify this easily.. Thanks in advance 

  March 19 at 11:50pm · Like
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  Maheshkumar Subbaiyan processname_pid.dump or .core..

  March 19 at 11:56pm · Edited · Like
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