sig 6 on postgres server

Hi Folks:
Recently I had a postgres instance shut down & restart, and I'm trying
to understand why. I'm running 8.3.5 on solaris 10, with the data
directory on a netapp. The postgres log shows an error associated with
some of the critical application tables not existing, then it was unable
to write to the log, then a sigabrt. Not long after postgres recovered.
There were no errors in the application (other than yelling about not
having a database), no syslog errors on the zone, no errors on the
netapp, no known break in connectivity. I ran a vacuum analyze based on
one posting I saw on this list, and things seem fine.

My questions are
- any idea what happened? Are there other things I should check?
- what should I do to ensure there is no data corruption?

Related pg log entries...
cpas 2009-03-02 14:56:32 PSTERROR:  relation "exp.domainproperty" does
not exist
...
cpas 2009-03-02 14:58:34 PSTPANIC:  could not write to log file 93,
segment 240 at offset 9560064, length 8192: Interrupted system call
@- 2009-03-02 14:58:37 PSTLOG:  server process (PID 19257) was
terminated by signal 6
@- 2009-03-02 14:58:37 PSTLOG:  terminating any other active server
processes
cpas 2009-03-02 14:58:37 PSTWARNING:  terminating connection because of
crash of another server process
Thanks for the help!
Mija

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