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Hi.
FreeBSD 5.1-p10 (and also possible other 5.1-pX version) can be remotely locked up if the following criteria is met:
+ apache2 has mod_ssl loaded and enabled + apache2 has the following configuration directives set to the following values:
SSLMutex sem
SSLSessionCache shm:/some/file(1048576)+ client connects via SSL/TLS to apache fast enough.
If all conditions above are satisfied except the last one, then lockup doesn't happen.
I tested on three 5.1-p10 machines (SMP, uniprocessor, uniprocessor with hypterthreading) with JMeter 1.9.1.
It is possible lockup machine with 100 requests (1 concurrent request) in 1-3 seconds.
If SSLMutex is set to file:/path/somewhere and SSLSessionCache is set to dbm:/some/dbm lockup does not accour.
Linux 2.4.22 is not affected by this issue.
Details:
apache: 2.0.47 php: 4.3.3 + turck mmcache 2.4.2 web application: horde imp webmail
Best regards, Brane -----BEGIN PGP SIGNATURE-----
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