Hi,
in the last months I have an issue on some servers where spamdyke
processes use the 100% of the CPU when connections are coming from
specific remote host. When this happens the load on the server increase
and the only way to solve is to kill the processes. We are running
spamdyke 5.0.1 on CentOS 6.10.
Here is an example where there are 2 spamdyke process (22218 and 22957)
at 100%CPU:
[root@srv-2 ~]# netstat -natpu | grep 22218
udp 0 0 0.0.0.0:45298
0.0.0.0:* 22218/spamdyke
[root@srv-2 ~]# netstat -natpu | grep 22957
tcp 200592 0 78.45.67.31:25 154.16.116.187:32320
CLOSE_WAIT 22957/spamdyke
udp 0 0 0.0.0.0:60265
0.0.0.0:* 22957/spamdyke
[root@srv-2 ~]# lsof -n | grep 22957
spamdyke 22957 vpopmail cwd DIR 253,0 4096
9830479 /var/qmail/supervise/qmail-smtpd
spamdyke 22957 vpopmail rtd DIR 253,0 4096 2 /
spamdyke 22957 vpopmail txt REG 253,0 325376
6557448 /usr/local/bin/spamdyke-5.0.1
spamdyke 22957 vpopmail mem REG 253,0 122056
13631570 /lib64/libselinux.so.1
spamdyke 22957 vpopmail mem REG 253,0 143280
13631527 /lib64/libpthread-2.12.so
spamdyke 22957 vpopmail mem REG 253,0 111440
13631529 /lib64/libresolv-2.12.so
spamdyke 22957 vpopmail mem REG 253,0 10192
13631671 /lib64/libkeyutils.so.1.3
spamdyke 22957 vpopmail mem REG 253,0 43728
13631681 /lib64/libkrb5support.so.0.1
spamdyke 22957 vpopmail mem REG 253,0 88600
13631554 /lib64/libz.so.1.2.3
spamdyke 22957 vpopmail mem REG 253,0 20024
13631509 /lib64/libdl-2.12.so
spamdyke 22957 vpopmail mem REG 253,0 174840
13631677 /lib64/libk5crypto.so.3.1
spamdyke 22957 vpopmail mem REG 253,0 14664
13631562 /lib64/libcom_err.so.2.1
spamdyke 22957 vpopmail mem REG 253,0 946048
13631679 /lib64/libkrb5.so.3.3
spamdyke 22957 vpopmail mem REG 253,0 277704
13631673 /lib64/libgssapi_krb5.so.2.2
spamdyke 22957 vpopmail mem REG 253,0 1971488
6555384 /usr/lib64/libcrypto.so.1.0.1e
spamdyke 22957 vpopmail mem REG 253,0 1924768
13631503 /lib64/libc-2.12.so
spamdyke 22957 vpopmail mem REG 253,0 443416
6555386 /usr/lib64/libssl.so.1.0.1e
spamdyke 22957 vpopmail mem REG 253,0 159312
13631897 /lib64/ld-2.12.so
spamdyke 22957 vpopmail 0u IPv4 1188469288 0t0
TCP 78.45.67.31:smtp->154.16.116.187:32320 (CLOSE_WAIT)
spamdyke 22957 vpopmail 1u IPv4 1188469288 0t0
TCP 78.45.67.31:smtp->154.16.116.187:32320 (CLOSE_WAIT)
spamdyke 22957 vpopmail 2w FIFO 0,8 0t0
10454 pipe
spamdyke 22957 vpopmail 3u IPv4 1188469320 0t0
UDP *:60265
spamdyke 22957 vpopmail 4u unix 0xffff88085f6e33c0 0t0
1188505138 socket
spamdyke 22957 vpopmail 6r FIFO 0,8 0t0
1188469325 pipe
[root@srv-2 ~]# lsof -n | grep 22218
spamdyke 22218 vpopmail cwd DIR 253,0 4096
9830479 /var/qmail/supervise/qmail-smtpd
spamdyke 22218 vpopmail rtd DIR 253,0 4096 2 /
spamdyke 22218 vpopmail txt REG 253,0 325376
6557448 /usr/local/bin/spamdyke-5.0.1
spamdyke 22218 vpopmail mem REG 253,0 122056
13631570 /lib64/libselinux.so.1
spamdyke 22218 vpopmail mem REG 253,0 143280
13631527 /lib64/libpthread-2.12.so
spamdyke 22218 vpopmail mem REG 253,0 111440
13631529 /lib64/libresolv-2.12.so
spamdyke 22218 vpopmail mem REG 253,0 10192
13631671 /lib64/libkeyutils.so.1.3
spamdyke 22218 vpopmail mem REG 253,0 43728
13631681 /lib64/libkrb5support.so.0.1
spamdyke 22218 vpopmail mem REG 253,0 88600
13631554 /lib64/libz.so.1.2.3
spamdyke 22218 vpopmail mem REG 253,0 20024
13631509 /lib64/libdl-2.12.so
spamdyke 22218 vpopmail mem REG 253,0 174840
13631677 /lib64/libk5crypto.so.3.1
spamdyke 22218 vpopmail mem REG 253,0 14664
13631562 /lib64/libcom_err.so.2.1
spamdyke 22218 vpopmail mem REG 253,0 946048
13631679 /lib64/libkrb5.so.3.3
spamdyke 22218 vpopmail mem REG 253,0 277704
13631673 /lib64/libgssapi_krb5.so.2.2
spamdyke 22218 vpopmail mem REG 253,0 1971488
6555384 /usr/lib64/libcrypto.so.1.0.1e
spamdyke 22218 vpopmail mem REG 253,0 1924768
13631503 /lib64/libc-2.12.so
spamdyke 22218 vpopmail mem REG 253,0 443416
6555386 /usr/lib64/libssl.so.1.0.1e
spamdyke 22218 vpopmail mem REG 253,0 159312
13631897 /lib64/ld-2.12.so
spamdyke 22218 vpopmail 0u sock 0,6 0t0
1188462010 can't identify protocol
spamdyke 22218 vpopmail 1u sock 0,6 0t0
1188462010 can't identify protocol
spamdyke 22218 vpopmail 2w FIFO 0,8 0t0
10454 pipe
spamdyke 22218 vpopmail 3u IPv4 1188462061 0t0
UDP *:45298
spamdyke 22218 vpopmail 4u unix 0xffff88016244f840 0t0
1188500514 socket
spamdyke 22218 vpopmail 6r FIFO 0,8 0t0
1188462067 pipe
The protocol is UDP, could be a DNS problem? The problem start
recentelly, apparently suddenly and without changing anything.
Do you have any suggestions on how to solve it?
Thanks
--
Alessio Cecchi
Postmaster @ http://www.qboxmail.it
https://www.linkedin.com/in/alessice
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