https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6170
Summary: large unicode email nails CPU
Product: Spamassassin
Version: 3.2.5
Platform: All
OS/Version: All
Status: NEW
Severity: critical
Priority: P5
Component: Libraries
AssignedTo: [email protected]
ReportedBy: [email protected]
Hi there
We're got a few people subscribed to Serbian mailing-lists, and one in
particular is having difficulty getting email to us - spamc/spamd times out and
is never able to process the message. While it is running, spamd takes 100% of
the CPU for 1.5+minute (so does spamassassin when run on the same message)
Here's an example: http://pastebin.com/m75f39d72
strace shows spamd running around looking for unicore/lib/gc_sc files - which
is related to unicode "stuff". I don't know if that's the problem - but that's
all I could find. "spamassassin -D " doesn't show anything strange other than
massively long times to process DNSBLs. They are not believable: the "slow"
DNSBLs change from invocation to invocation (of the same message), and "dig"
shows no such issues - the DNSBLs SA says are taking 99sec to complete return
instantly via dig (and yes, local caching DNS). Also, it is specifically a
problem with these emails - in general we are not seeing any problems with any
other email.
We've also got SA in several countries, all on CentOS5 servers
(perl-5.8.8,spamassassin-3.2.5-1) and they all show the same symptoms - so I
don't think it's network related but rather CPU: basically these emails nail SA
and it's slow to finish for them?
Jason
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