Am 26.01.2018 um 08:32 schrieb Dianne Skoll:
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
sounds like an issue with the official signatures given that you are not
the first reporter and that we don't use them and have no problems
freshclam and a custom script downloads anything to
/var/lib/clamav-download and then for the two "/var/lib/clamav" and
"/var/lib/clamav-sa" basend on file-lists hardlinks are set - from the
official only "safebrowsing" is active
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