[Clamav-devel] URGENT: Clamd is wedged on multiple installations

Per Jessen per at computer.org
Fri Jan 26 09:26:06 EST 2018


Per Jessen wrote:

> Dianne Skoll wrote:
> 
>> Hi,
>> 
>> Something went badly wrong with clamd recently; it's stuck with
>> hundreds/thousands of open files per process and interrupting mail
>> flow.
>> 
>> When a scanning thread finishes, I see this in the strace output.
>> (I ran clamdscan /etc/hosts as a test):
>> 
>> [pid  3707] 02:11:01 sendto(295, "/etc/hosts: OK\n", 15, 0, NULL, 0)
>> [= 15
>> [pid  3707] 02:11:01 shutdown(295, SHUT_RDWR) = 0
>> [pid  3707] 02:11:01 close(295)         = 0
>> [pid  3707] 02:11:01 futex(0x1933c3c,
>> [FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 387, {1516950691,
>> [0}, ffffffff) = -1 ETIMEDOUT (Connection timed out)
>> [pid  3707] 02:11:31 futex(0x1933c10, FUTEX_WAKE_PRIVATE, 1) = 0
>> [pid  3707] 02:11:31 madvise(0x7fae6affe000, 8368128, MADV_DONTNEED)
>> [= 0
>> [pid  3707] 02:11:31 _exit(0)           = ?
>> [pid  3707] 02:11:31 +++ exited with 0 +++
>> 
>> So it scans the file, says it's OK. and then hangs in the futex for
>> 30 seconds.
>> 
>> HELP!  This is causing major outages for many of our customers.
> 
> We're seeing something similar - this morning with 0.99.2, later with
> 0.99.3.  I am guessing there is something wrong in the database?

We run our own daemon using the clamav libraries - in /tmp I see
directories like this:

clamav-168beed7241e57cd439e26cd5fd96eac.tmp/

they seem to be piling up and our daemon eventually runs out of file
descriptors.


-- 
Per Jessen, Zürich (8.1°C)




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