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I'm running quite a lot of computations on Ubuntu 12.04 (3.8.0-35-generic), application is written in Java (Oracle 1.7.0_45-b18) on a server which has 12 AMD cores. Typically the computations uses 10 threads, sometimes the load average in htop looks like this: 13.46, 13.01, 13.07. But usually the numbers are lower.

Anyway, last week one machine freezed, I wasn't able to connect over ssh, from remote console I took this screenshot, rebooted.

java kernel panic

There was nothing interesting in system logs. Today another machine with very same configuration did the same.

Is there a way how to debug kernel panic?

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There's a lot of different things that could cause this...including hardware issues. Have you recently installed new hardware? Upgraded the kernel? –  Nathan C Feb 5 at 13:19
    
It's kernel panic in interrupt context - most likely java is not a culprit there - just interrupt happen to strike in the middle of java execution. –  SaveTheRbtz Feb 6 at 2:16
    
No new hardware, but there was a security kernel update 3.8.0-35.52~precise1 and the crash occurred on the same day (machine wasn't rebooted afterwards). I've enabled only unattened security updates but it was probably a mistake. What do you think? –  Tombart Feb 6 at 9:52

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