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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">A few months ago we started using the Shibboleth Service Provider v3.1.0.1 on IIS on Windows Server 2016 (with all recent Windows updates)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">It can be running fine for days but then sometimes w3wp.exe crashes (a few times on a day) with no apparent cause.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Windows Error Reporting shows:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
</span>Faulting application name: w3wp.exe, version: 10.0.14393.0, time stamp: 0x57899b8a
<br>
Faulting module name: KERNELBASE.dll, version: 10.0.14393.3659, time stamp: 0x5e9140ed
<br>
Exception code: 0xe06d7363 <br>
Fault offset: 0x0000000000034f38 <br>
Faulting process id: 0xc44c <br>
Faulting application start time: 0x01d65efa426943f8 <br>
Faulting application path: c:\windows\system32\inetsrv\w3wp.exe <br>
Faulting module path: C:\Windows\System32\KERNELBASE.dll<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The 0xe06d7363 translates to EXCEPTION_UNCAUGHT_CXX_EXCEPTION<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Next step is to catch a minidump. The Call Stack is shown below<o:p></o:p></p>
<p class="MsoNormal">Iis7_shib.dll is very high in the call-stack with <span style="font-size:9.5pt;font-family:Consolas;color:black">
IIS7Request::throwError at the top.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black">It is called by IIS7Request::getRequestBody because a call to m_request->ReadEntityBody fails.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal">First of all: I am not sure Shibboleth is *<b>causing</b>* the crash, maybe it is just collateral damage. But it may help in finding the root cause<o:p></o:p></p>
<p class="MsoNormal">My questions:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>A message goes into the <span style="font-size:9.5pt;font-family:Consolas;color:black">
IOException. Is there any way to retrieve that message (some logging perhaps? I could not find it in shibd.log or any other log)<br>
It might be interesting to know exactly why m_request->ReadEntityBody fails</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>ReadEntityBody sound like it is receiving data. Is it fair to generate an (unhandled) exception for ‘just’ a network error?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>If it is only collateral damage: is there a way to catch the exception?
<br>
I do see the <InProcess> element supports a (disadvised) catchAll but if I read the sourcecode correctly it may not apply to the IOException (not tested yet)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>(minor issue: Visual Studio could debug the DLL’s nicely with all the supplied PDB’s but failed to connect shibsp-lite3_1.pdb to shibsp-lite3_1.dll. I had to apply a very old ChkMatch.exe tool from the Internet)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">(callstack and shibd.log follows)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">> KERNELBASE.dll!RaiseException‑() Unknown<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> [External Code]
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> iis7_shib.dll!IIS7Request::throwError(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & operation, HRESULT hr) Line 452 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> iis7_shib.dll!IIS7Request::getRequestBody() Line 332 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> shibsp-lite3_1.dll!std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,boost::shared_ptr<shibsp::DOMPropertySet>,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char>
> >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,boost::shared_ptr<shibsp::DOMPropertySet> > >,0> >::_Insert_hint<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,boost::shared_ptr<shibsp::DOMPropertySet>
> &,std::_Tree_node<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,boost::shared_ptr<shibsp::DOMPropertySet> >,void *> *>(std::_Tree_const_iterator<std::_Tree_val<std::_Tree_simple_types<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
> const ,boost::shared_ptr<shibsp::DOMPropertySet> > > > > _Where, std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,boost::shared_ptr<shibsp::DOMPropertySet> > & _Val, std::_Tree_node<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
> const ,boost::shared_ptr<shibsp::DOMPropertySet> >,void *> * _Newnode) Line 1703 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> shibsp-lite3_1.dll!shibsp::AbstractSPRequest::getHandlerURL(const char * resource) Line 247 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> xmltooling-lite3_1.dll!xmltooling::TemplateEngine::TemplateParameters::getParameter(const char * name) Line 61 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> shibsp-lite3_1.dll!shibsp::ServerThread::job() Line 597 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> xmltooling-lite3_1.dll!xmltooling::TemplateEngine::process(bool visible, const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & buf, const char
* & lastpos, std::basic_ostream<char,std::char_traits<char> > & os, const xmltooling::TemplateEngine::TemplateParameters & parameters, const std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char>
> > & loopentry, const xmltooling::XMLToolingException * e) Line 157 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> xmltooling-lite3_1.dll!xmltooling::TemplateEngine::run(std::basic_istream<char,std::char_traits<char> > & is, std::basic_ostream<char,std::char_traits<char> > & os,
const xmltooling::TemplateEngine::TemplateParameters & parameters, const xmltooling::XMLToolingException * e) Line 286 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> shibsp-lite3_1.dll!shibsp::ServiceProvider::doHandler(shibsp::SPRequest & request) Line 684 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> [External Code]
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> shibsp-lite3_1.dll!shibsp::DOMPropertySet::load(const xercesc_3_2::DOMElement * e, log4shib::Category * log, xercesc_3_2::DOMNodeFilter * filter, const shibsp::DOMPropertySet::Remapper
* remapper, const xmltooling::QName * unsetter) Line 151 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> iis7_shib.dll!ShibHttpModule::DoHandler(IHttpContext * pHttpContext, IHttpEventProvider * pProvider) Line 62 C++<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> [External Code]
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Also: this is what shibd.log shows during the crash:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [45]: error reading size of input message<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [45]: failed socket call (unknown), result (0): No error<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [45]: I/O failure processing request on socket (636)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [47]: error reading size of input message<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [47]: failed socket call (unknown), result (0): No error<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [47]: I/O failure processing request on socket (440)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [46]: error reading size of input message<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [46]: failed socket call (unknown), result (0): No error<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">2020-08-19 17:13:17 ERROR Shibboleth.Listener [46]: I/O failure processing request on socket (648)<o:p></o:p></span></p>
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