[stunnel-users] stunnel crash when multiple connections

[Debin Chen]

Hi,

I will appreciate greatly if you can diagnose the following crash
problem:

I am using stunnel 4.05, working with webserver thttpd to provide a
https solution, in linux environment. First I wrote down some noticeable
behavior of stunnel.

1) stunnel each time spawns a thread to handle the https connection then
destroy the thread. If I browse a lot of pages, then internally a lot of
thread ( or process) got created and destroyed.

2) Sometimes after a https request is completed, the thread is still
there. Only following request will trigger the thread got destroyed.
Normally if there is no activity, just 2 threads left. 

The problem: During some stress testing, such as multiple ( in my case,
actually just 2 or 3) web browser simultaneously issues request to the
web server in https, I found out in certain moment  stunnel spawns more
than 5 or 6 threads to handle the connections, sometimes it crashed
without giving out any serious debug error messages. When it crashed,
system resource of CPU and memory is still sufficient. Note than I
already set timeoutclose=0, that should be done.

Best Regards

Debin Chen

========================================
Advanced Storage Division
Promise Technology, Inc.
580 Cottonwood Drive,
Milpitas, CA 95035
Tel: 408-228-1529

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