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Thanks for explaining.</div>
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I haven't seen this issue in earlier versions. </div>
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It could worth limiting <b>MaxRequestWorkers</b> on apache level to fix this issue. Any temporary workaround to fix this issue.</div>
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Any idea about limits number of tcp connection per ec2 instance?</div>
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In your Apache MPM configuration (e.g., in `/etc/httpd/conf.modules.d/00-mpm.conf` or your main config): `</div>
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``apache <IfModule mpm_prefork_module></div>
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MaxRequestWorkers 256 </IfModule> </div>
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<IfModule mpm_worker_module> MaxRequestWorkers 300 </IfModule> </div>
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<IfModule mpm_event_module> MaxRequestWorkers 300 </IfModule> ```</div>
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Regards,</div>
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Satheesh</div>
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<b>From:</b> users <users-bounces@shibboleth.net> on behalf of Cantor, Scott via users <users@shibboleth.net><br>
<b>Sent:</b> Wednesday, July 16, 2025 11:01 PM<br>
<b>To:</b> Shib Users <users@shibboleth.net><br>
<b>Cc:</b> Cantor, Scott <cantor.2@osu.edu></div>
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<b>Subject:</b> Re: shibd Aborted, No Error in Logs </div>
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<div style="font-size: 11pt;">*** External email: use caution ***<br>
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> You should have the thread count there from the core, and that<br>
> would indicate roughly how many sockets were open, though not<br>
> one to one.<br>
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Concretely, I've seen maybe on the order of 20-30 sockets open on a heavily loaded worker mode Apache, as it basically matches the Apache child count "mostly", and probably double the child count is as much as I'd expect.<br>
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If it's more than that, somethiing's hanging it up getting work done and maybe causing more sockets than it should be, but the daemon generally doesn't do a lot of work that causes delays unless memcache or ODBC were used (*).<br>
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-- Scott<br>
<br>
(*) Metadata aside, but that's more about memory than a cause of performance lag after startup, and MDQ obviates that anyway.<br>
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<br>
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