FYI : Datanode does not run any user code and does not link with any native/JNI code.

Raghu.

Chris Collins wrote:
Was there anything mentioned as part of the tombstone message about "problematic frame"? What java are you using? There are a few reasons for SIGBUS errors, one is illegal address alignment, but from java thats very unlikely....there were some issues with the native zip library in older vm's. As Brian pointed out, sometimes this points to a hw issue.

C
On Dec 1, 2008, at 1:32 PM, Sagar Naik wrote:



Brian Bockelman wrote:
Hardware/memory problems?
I m not sure.

SIGBUS is relatively rare; it sometimes indicates a hardware error in the memory system, depending on your arch.

*uname -a : *
Linux hdimg53 2.6.15-1.2054_FC5smp #1 SMP Tue Mar 14 16:05:46 EST 2006 i686 i686 i386 GNU/Linux
*top's top*
Cpu(s): 0.1% us, 1.1% sy, 0.0% ni, 98.0% id, 0.8% wa, 0.0% hi, 0.0% si
Mem:   8288280k total,  1575680k used,  6712600k free,     5392k buffers
Swap: 16386292k total,       68k used, 16386224k free,   522408k cached

8 core , xeon  2GHz

Brian

On Dec 1, 2008, at 3:00 PM, Sagar Naik wrote:

Couple of the datanodes crashed with the following error
The /tmp is 15% occupied

#
# An unexpected error has been detected by Java Runtime Environment:
#
#  SIGBUS (0x7) at pc=0xb4edcb6a, pid=10111, tid=1212181408
#
[Too many errors, abort]

Pl suggest how should I go to debug this particular problem


-Sagar


Thanks to Brian

-Sagar


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