Hi Mike, it might be that you are hit by a bad crawler/bot and need to block access for them in your firewall. There are some that ignore the robots.txt and they can bring down a Koha server.
I you look at the Apache access logs you might see that all those requests come from the same IP address. Hope this helps, Katrin On 10.07.24 13:02, Mike Lake wrote:
Hi all I'm having serious problems with my Koha instance. It serves the OPAC for the Australian Speleological Federation. We are currently on Koha 23.11 on a Debian 10.13. The system has been running fine for ages. I was getting errors from the OOM killer: oom_reaper: reaped process 1554 (opac-search.pl), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB opac-search.pl invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0 opac-search.pl cpuset=/ mems_allowed=0 So I shutdown Koha (took a while as I was out of memory) systemctl stop koha-common.service Rebooted the machine and when i bought Koha up: systemctl start koha-common.service Now I'm still getting 96 processes & errors taking all CPU and memory: 3620 R /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/opac-imageviewer.pl 3622 R /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/errors/500.pl 3624 R /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/errors/500.pl 3625 D /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/opac-search.pl 3627 R /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/errors/500.pl 3629 D /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/opac-search.pl 3630 R /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/errors/500.pl 3633 D /usr/bin/perl /usr/share/koha/opac/cgi-bin/opac/errors/500.pl Actually its 96 x opac-search.pl + 57 x 500.pl A reboot does not help. Every time I start Koha those processes appear and take all cores and memory. I do see that the MariaDB is down. "Failed to start MariaDB 10.3.39 database server." Attempts to start it: systemctl start mariadb.service give that error probably because I'm out of memory does to the 100 perl processes running. A "systemctl stop koha-common.service" does not stop or end those opac-search.pl or 500.pl processes. The /var/log/koha/opac/opac-error.log says: [cgi:error] [pid 6911] [client 124.243.148.74:47310] End of script output before headers: 500.pl [cgi:error] [pid 6959] [client 190.92.216.104:41580] End of script output before headers: opac-search.pl Something is borked :-( Help most welcome.
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