Synchronet v3.19b-Win32 (install) has been released (Jan-2022).

You can donate to the Synchronet project using PayPal.

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
faq:nix [2022/05/07 09:27] – Fixed broken anchor link. Cleaned up the entry a bit and clarified how the limits work. Andrefaq:nix [2023/02/08 23:50] (current) – [Maximum Open Files] Replace pgrep with pidof digital man
Line 257: Line 257:
 **Question:**\\ **Question:**\\
 Why am I seeing ''ERROR 24 (Too many open files)'' failures in my error log? Why am I seeing ''ERROR 24 (Too many open files)'' failures in my error log?
 +
 +**Answer:**\\
 +Versions of Synchronet prior to v3.19c contained a bug with the JavaScript //User// class that could cause a leak of open file descriptors (concurrent opens of the ''[[dir:data]]/user.dat'' file that were never closed). This bug, combined with a long-running //webv4// ''events.ssjs'' issue that could cause a lot of instances of the //User// class to linger in the JavaScript heap (since fixed with a call to ''js.gc()''), could cause "Too many open files" errors to occur.
  
 **Answer:**\\ **Answer:**\\
 You need to increase your maximum number of open files. You need to increase your maximum number of open files.
 +\\ \\
 +**Checking current open file limits**\\
 +The most reliable way to determine your open file limit is to login to your BBS as a sysop, run the '';SHELL'' [[module:str_cmds|string command]], and at the OS command line, issue the commands below. The hard limit is the systemwide limit, and the soft limit is one that a user can raise (up to the hard limit).
  
-To determine your open file limit, when logged in as the user Synchronet runs as, use the commands below. The hard limit is the systemwide limit, and the soft limit is a soft limit that a user can raise (up to the hard limit).+To view the soft limit: ''ulimit -Sn''\\ 
 +To view the hard limit: ''ulimit -Hn''
  
-Soft limit: ''ulimit -Sn''\\ +Another method that works on Linux is to search for line beginning with "Max open files" in the file ''/proc/$(pidof sbbs)/limits'': 
-Hard limit: ''ulimit -Hn''+  $ sudo grep "Max open files" /proc/$(pidof sbbs)/limits 
 +  Max open files            10000                10000                files     
  
-To alleviate the ERROR 24 problem on Linux, edit ''/etc/security/limits.conf'' to add the lines below.+**If you start Synchronet with systemd**\\ 
 +If you're using [[howto:systemd|systemd]] to start sbbs, edit your service file (usually ''sbbs.service'') by adding the following line in the ''[Service]'' section:
  
-To raise the soft limit up to the hard limit for your Synchronet user, it is recommended to add this line: +<file sbbs.service> 
- +LimitNOFILE=10000
-<file limits.conf> +
-yourBBSuser     soft     nofile     unlimited+
 </file> </file>
  
-If you are still receiving ERROR 24, try raising both limits for all users by adding these lines instead:+After adding the line, reload the service file from the command line using ''systemctl daemon-reload''. Finally, restart Synchronet. 
 + 
 +**If you start Synchronet manually or with a shell script**\\ 
 +If you start sbbs with a shell script, manually from the command line, or some other similar method, edit ''/etc/security/limits.conf'' to add the lines below. 
 + 
 +To raise the soft limit for your Synchronet user, add this line:
  
 <file limits.conf> <file limits.conf>
-*               hard     nofile     unlimited +yourBBSuser     soft     nofile     10000
-*               soft     nofile     unlimited+
 </file> </file>
- + 
 + 
 +      
 ===== See Also ===== ===== See Also =====
   * [[:faq:|Frequently Asked Questions]]   * [[:faq:|Frequently Asked Questions]]

Trace: