mod_lsapi installed and finding some errors/issues in logs
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  1. Anonymous User
  2. Wednesday, 09 October 2019
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Just installed mod_lsapi yesterday and while I am not noticing any issues there appears to be some behind the scenes. This server has heavy traffic, but the vast majority are very small requests that happen quickly. I was previously using suphp and suexec. After adding mod_lsapi in EA4 the only thing I have changed is the handler in multiphp manager to lsapi. Using mpm-event. Here are some of the things I have found so far :


/var/log/apache2/lsphp-stderr.log :
[8792] Reached max children process limit: 120, extra: 0, current: 120, busy: 120, please increase LSAPI_CHILDREN.

/var/log/apache2/sulsphp_log :
[Wed Oct 09 12:45:44 2019] sulsphp: uid:(502/user); gid:(502/user); with suexec mode; cmd:(/opt/cpanel/ea-php73/root/usr/bin/lsphp)

/var/log/apache2/error_log :
[Tue Oct 08 23:31:21.596388 2019] [lsapi:error] [pid 8032:tid 47763622516480] [client 111.111.111.111:58730] [host http://www.example.com] get_client_block(16384) failed
[Tue Oct 08 23:31:21.596431 2019] [lsapi:error] [pid 8032:tid 47763622516480] [client 111.111.111.111:58730] [host http://www.example.com] Client error on sending request(POST /app/app/add_log.php HTTP/1.1); uri(/app/app/add_log.php) content-length(994): user_get_body(tmpstackbuf, 16384): read from client failed


Any advice would be appreciated. The 1st and 3rd worry me as it looks as though we are denying/failing requests which is going to be a problem.
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  1. 15.10.2019 08:10:53
  2. # 1
Sergey Khristich Accepted Answer
Posts: 88
Joined: 20.05.2019
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Hello, thank you for reaching out! You can try increasing lsapi_backend_max_process_time 600 in lsapi.conf. For the Reached max children process limit error, you can increase lsapi_backend_children for the UID in vhost.conf or globally in lsapi.conf too. More information here https://docs.cloudlinux.com/apache_mod_lsapi/#troubleshooting.
Please let us know if you have any questions.
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