OLS randomly crashing at LsAioReq::io_complete(short)

[xirtam]

I'm getting random coredumps on ALL my VPS running Ubuntu.
Using gdb and bt I get the following backtrace:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `openlitesp'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000000000658166 in LsAioReq::io_complete(short) ()
(gdb) bt
#0  0x0000000000658166 in LsAioReq::io_complete(short) ()
#1  0x00000000006595ec in Iouring::check_pending() ()
#2  0x000000000065be36 in epoll::processEvents() ()
#3  0x00000000004e9577 in EventDispatcher::run() ()
#4  0x00000000004bede3 in HttpServerImpl::start() ()
#5  0x000000000049906f in LshttpdMain::main(int, char**) ()
#6  0x0000000000498f3f in main ()

Anyone know what exactly the problem is?
What does LsAioReq::io_complete do exactly?

 

[Cold-Egg]

If it happens on the current latest version v1.8.5, please submit the issue to support@litespeedtech.com with this forum post link appended, we will help to check the issue from there.

 

[xirtam]

Ok, I'm also having another problem. Even with log level set to info, warn or debug+none, I still get debug in my error.log, filling the disks. The problem is just like described here https://forum.openlitespeed.org/thr...n-server-log-when-logging-is-turned-off.4909/ (also same lines logged apparently)

 

[Cold-Egg]

@xirtam
Could you let us know the output of this command?

/usr/local/lsws/bin/lshttpd -v

In addition, please try running the following command to update to the latest package build and see if that fixes the issue:

/usr/local/lsws/admin/misc/lsup.sh

 

[xirtam]

@xirtam
Could you let us know the output of this command?

/usr/local/lsws/bin/lshttpd -v

In addition, please try running the following command to update to the latest package build and see if that fixes the issue:

/usr/local/lsws/admin/misc/lsup.sh

LiteSpeed/1.8.5 Open (BUILD built: Tue Jan 13 22:46:41 UTC 2026)
module versions:
lsquic 4.4.1
modgzip 1.1
cache 1.66
mod_security 1.4 (with libmodsecurity v3.0.14)

Also i found an old thread about this issue. I'm also having only QUIC debug logs apparently: https://forum.openlitespeed.org/threads/ols-1-6-8-and-quic-debug-logs.4150/

This is probably the cause of the random crashes above, once it fills the disk.
The question is why it's logging debug logs even if loglevel is ERROR and debuglevel is 0.

I already sent an email with the logfile to support.