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From "Sam Carleton (JIRA)" <j...@apache.org>
Subject [jira] Created: (AXIS2C-1476) Memory leak when loosing connections
Date Mon, 03 May 2010 12:32:55 GMT
Memory leak when loosing connections
------------------------------------

                 Key: AXIS2C-1476
                 URL: https://issues.apache.org/jira/browse/AXIS2C-1476
             Project: Axis2-C
          Issue Type: Bug
          Components: httpd module
    Affects Versions: 1.6.0
         Environment: Windows 7 64-bit, Visual Studio 2010
            Reporter: Sam Carleton
            Priority: Blocker
             Fix For: Next Version


I was load testing my apache code today by starting 50 clients which all start in a slide
show mode, pooling the server at least every 5 seconds.  I have a manager program that starts
the clients and does does an abort of the processes when I want to close them.  That is the
secret, the abort...

I was watching memory usage while it ran, and all was fine, Apache held steady at around 55
megs.  Once I killed the 50 processes, all at the EXACT same time, well milliseconds apart,
the memory usage sky rocketed.  When I broke the code, I was in the mod_axis2::apache2_stream_read
function.

It turns out that ap_get_client_block(...) was returning 0xFFFFFFFF to the read variable:

read = ap_get_client_block(stream_impl->request, (char *) buffer + len,
                           count - len);
if (read > 0)

It turns out that read is unsigned, so the 0xFFFFFFFF is NOT negative, so I changed the code
to read:

if (read > 0 && read != 0xFFFFFFFF)

All is well after the minor addition!

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