IIS 7.5 - Default App Pool crash - Shibboleth SP

Chris Glaubig cglaubig at imedris.com
Mon Sep 8 18:50:16 EDT 2014

Hello all,


I am not sure if this is the right list to be emailing issues.  If not then
please let me know.


I have a few Windows Server 2008R2 machines that have Shibboleth SP 2.5.0
(Run as 32-bit enabled) installed on them.

Every once in awhile, the  IIS Default Application Pool will stop. As soon
as I log into IIS and start it again, everything works again.


I get the following log entries into the shibd.log:

2014-09-05 16:21:28 ERROR Shibboleth.Listener [31]: socket call (unknown)
resulted in error (0): No error

2014-09-05 16:21:28 ERROR Shibboleth.Listener [31]: I/O failure processing
request on socket (420)

2014-09-05 16:21:28 ERROR Shibboleth.Listener [32]: error reading size of
input message



I also get some Event Viewer errors: 

1) Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp:
0x4ce7a5f8. Faulting module name: ntdll.dll, version: 6.1.7601.17514, time
stamp: 0x4ce7ba58

2) The description for Event ID 7701 from source Shibboleth ISAPI Filter
cannot be found. Either the component that raises this event is not
installed on your local computer or the installation is corrupted. You can
install or repair the component on the local computer.



Does anybody have some leads on how to reproduce this issue?  I've found
some issues described online that might be related, but I don't want to
start testing fixes until I'm able to reproduce this issue.



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