[Varnish] #784: Varnish crash at HSH_Lookup()

[Varnish]

#784: Varnish crash at HSH_Lookup()
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 Reporter:  censored  |       Owner:  phk                     
     Type:  defect    |      Status:  new                     
 Priority:  normal    |   Milestone:                          
Component:  varnishd  |     Version:  2.1.3                   
 Severity:  normal    |    Keywords:  varnishd HSH_Lookup died
----------------------+-----------------------------------------------------

Comment(by censored):

 - This is the first occurrence.
 - 24G RAM, 856G Swap.
 - 6x Intel X-25M SSD 160GB are used for swap.
 - Only IP-addresses, filenames and hostnames were modified from original
 backtrace.

 dmesg is clear, but I found another crash a day earlier:

 Sep 26 11:07:04 titan varnishd[7667]: Child (7668) said <jemalloc>:
 (malloc) Error in munmap():
 Sep 26 11:07:05 titan varnishd[7667]: Child (7668) said <jemalloc>:
 (malloc) Error in munmap():
 Sep 26 11:07:05 titan varnishd[7667]: Child (7668) said <jemalloc>:
 (malloc) Error in munmap():
 Sep 26 11:07:06 titan varnishd[7667]: Child (7668) said <jemalloc>:
 (malloc) Error in munmap():
 Sep 26 11:07:06 titan varnishd[7667]: Child (7668) said // Notice the
 empty message here
 ...
 Sep 26 12:34:56 titan varnishd[7667]: Child (7668) said <jemalloc>:
 (malloc) Error in munmap(): ö#001 // Notice garbage at the end, most lines
 don't, some do.
 ( REPEAT x 17k )
 Sep 26 15:40:02 titan varnishd[7667]: Child (7668) not responding to ping,
 killing it.
 Sep 26 15:40:02 titan varnishd[7667]: Child (7668) died signal=3
 Sep 26 15:40:02 titan varnishd[7667]: Child cleanup complete
 Sep 26 15:40:02 titan varnishd[7667]: child (25316) Started
 Sep 26 15:40:02 titan varnishd[7667]: Child (25316) said
 Sep 26 15:40:02 titan varnishd[7667]: Child (25316) said Child starts

 An identical server is running without any problems. Do you think one of
 the drives is messing up data?

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Ticket URL: <http://varnish-cache.org/trac/ticket/784#comment:4>
Varnish <http://varnish-cache.org/>
The Varnish HTTP Accelerator