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http://bugs.exim.org/show_bug.cgi?id=1178
Summary: queue runner is using huge amounts of memory
Product: Exim
Version: 4.69
Platform: Other
OS/Version: Linux
Status: NEW
Severity: bug
Priority: high
Component: Queues
AssignedTo: nigel@???
ReportedBy: admins@???
CC: exim-dev@???
This bug would be hard to reproduce.
We've noticed that one of our servers is constantly going into swap-then-dead
state. Something was using quite a lot of memory. Investigation revealed that
the source of problems is exim queue runner process. It runs for 2-3-4 days
(queue runner!!), slowly increasing its memory usage and then, if we're lucky,
it gets killed by oom condition. As the server runs CPanel (and their small
mods, I presume), the version number isn't much recent.
So here's what I see currently:
# ps -O etime,cputime,rss,vsize -p 6676
PID ELAPSED TIME RSS VSZ S TTY TIME COMMAND
6676 49:06 00:27:25 862280 924248 R ? 00:27:25 /usr/sbin/exim -q
And this is just the start. It will grow further and further.
I have "(gdb) generate-core-file" of that process and can supply it if needed.
# exim -bV
Exim version 4.69 #1 built 15-Aug-2011 12:18:22
Copyright (c) University of Cambridge 2006
Berkeley DB: Sleepycat Software: Berkeley DB 4.3.29: (July 12, 2010)
Support for: crypteq iconv() IPv6 PAM Perl OpenSSL Content_Scanning Old_Demime
Experimental_SPF Experimental_SRS Experimental_DomainKeys Experimental_DKIM
Lookups: lsearch wildlsearch nwildlsearch iplsearch dbm dbmnz passwd
Authenticators: cram_md5 dovecot plaintext spa
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/maildir autoreply pipe smtp
Size of off_t: 8
Configuration file is /etc/exim.conf
# du -h --max-depth=1 /var/spool/exim/
980K /var/spool/exim/scan
7.9M /var/spool/exim/input
368K /var/spool/exim/msglog
4.6M /var/spool/exim/db
14M /var/spool/exim/
# exim -bpc
51
# lsof -nn -p 6676
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
exim 6676 root cwd DIR 8,5 4096 851158 /var/spool/exim
exim 6676 root rtd DIR 8,2 4096 2 /
exim 6676 root txt REG 8,2 1227584 11156129 /usr/sbin/exim
exim 6676 root mem REG 8,2 143600 53969079 /lib64/ld-2.5.so
exim 6676 root mem REG 8,2 1722304 53969163 /lib64/libc-2.5.so
exim 6676 root mem REG 8,2 23360 53969173 /lib64/libdl-2.5.so
exim 6676 root mem REG 8,2 145824 53969175 /lib64/libpthread-2.5.so
exim 6676 root mem REG 8,2 615136 53969167 /lib64/libm-2.5.so
exim 6676 root mem REG 8,2 85544 53969178 /lib64/libz.so.1.2.3
exim 6676 root mem REG 8,2 95464 53969187 /lib64/libselinux.so.1
exim 6676 root mem REG 8,2 247496 53969184 /lib64/libsepol.so.1
exim 6676 root mem REG 8,2 1008656 53968996 /lib64/libdb-4.3.so
exim 6676 root mem REG 8,2 114352 53969172 /lib64/libnsl-2.5.so
exim 6676 root mem REG 8,2 48600 53969143 /lib64/libcrypt-2.5.so
exim 6676 root mem REG 8,2 92736 53969228 /lib64/libresolv-2.5.so
exim 6676 root mem REG 8,2 58400 53969170
/lib64/libgcc_s-4.1.2-20080825.so.1
exim 6676 root mem REG 8,2 1366368 53969298
/lib64/libcrypto.so.0.9.8e
exim 6676 root mem REG 8,2 9472 53968900
/lib64/libkeyutils-1.2.so
exim 6676 root mem REG 8,2 976312 11157654
/usr/lib64/libstdc++.so.6.0.8
exim 6676 root mem REG 8,2 10096 53969237 /lib64/libcom_err.so.2.1
exim 6676 root mem REG 8,2 98920 53969137 /lib64/libaudit.so.0.0.0
exim 6676 root mem REG 8,2 190976 11159606
/usr/lib64/libgssapi_krb5.so.2.2
exim 6676 root mem REG 8,2 1262384 11274688
/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/CORE/libperl.so
exim 6676 root mem REG 8,2 35984 11159365
/usr/lib64/libkrb5support.so.0.1
exim 6676 root mem REG 8,2 153720 11159519
/usr/lib64/libk5crypto.so.3.1
exim 6676 root mem REG 8,2 614088 11159522
/usr/lib64/libkrb5.so.3.3
exim 6676 root mem REG 8,2 315064 53969372 /lib64/libssl.so.0.9.8e
exim 6676 root mem REG 8,2 46800 53969190 /lib64/libpam.so.0.81.5
exim 6676 root mem REG 8,2 18152 53969419 /lib64/libutil-2.5.so
exim 6676 root mem REG 8,2 53880 53969033
/lib64/libnss_files-2.5.so
exim 6676 root 0u CHR 1,3 1707 /dev/null
exim 6676 root 1u CHR 1,3 1707 /dev/null
exim 6676 root 2u CHR 1,3 1707 /dev/null
exim 6676 root 3w REG 8,5 25547447 523874 /var/log/exim_mainlog
exim 6676 root 4uw REG 8,5 264584 851706
/var/spool/exim/input/x/1ROIPx-0007P2-6M-D
exim 6676 root 5w FIFO 0,6 558829 pipe
exim 6676 root 6w REG 8,5 0 851671
/var/spool/exim/msglog/x/1ROIPx-0007P2-6M
exim 6676 root 11r FIFO 0,6 1050994 pipe
1050994 pipes come and go, but the 1ROIPx-0007P2-6M message fds stay there.
-rw-r----- 1 mailnull mail 0 Nov 23 10:12
/var/spool/exim/msglog/x/1ROIPx-0007P2-6M
/var/spool/exim/input/x/1ROIPx-0007P2-6M-D is basically spam with
DHL-Express-Delivery-Notification-2034_25UQ.zip file embedded.
We have "demime" in exim.conf if that's relevant.
I consider this a bug. Help!
Thanks.
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