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From Alexander Bernstein <alexbernstein1...@yahoo.com.INVALID>
Subject Re: GPF in WindowsNegotiateScheme.dispose()
Date Thu, 27 Aug 2015 12:48:35 GMT
Thank you, Oleg,
There are three layers of code here, my app code, the http client code, and the JNA. All the
manipulation of WindowsNegotiateScheme is done internally by http client code, through the
WindowsNegotiateSchemeFactory. Perhaps there is something I need to do in my application,
in terms of cleaning, but I just do not see when and how. Another possibility is that the
WindowsNegotiateScheme is somehow mismanaged by AuthenticationStrategyImpl? Just a wild guess

I would like to hear from JNA team, what condition on the application side would cause the
GPF in the native code to help us understand what is going wrong on a higher level. Unfortunately,
I can not figure out how to post a question on https://github.com/java-native-access just
unable to find anything like forums or support.
Appreciate your help
      From: Oleg Kalnichevski <olegk@apache.org>
 To: Alexander Bernstein <alexbernstein1965@yahoo.com> 
Cc: "httpclient-users@hc.apache.org" <httpclient-users@hc.apache.org> 
 Sent: Thursday, August 27, 2015 4:18 AM
 Subject: Re: GPF in WindowsNegotiateScheme.dispose()
On Wed, 2015-08-26 at 20:07 +0000, Alexander Bernstein wrote:

> Hello,
> I am new here, please pardon if this is not the right place for this kind of question.
> I am using httpclient-win-4.5 from httpClient 4.5 and jna-4.1.0/jna-platform-4.1.0 JNA
libraries to authenticate to Kerberos server from Eclipse-based application. 
> I create my client from WinHttpClients.custom(). The authentication is successful, but
sooner or later, when JVM calls WindowsNegotiateScheme.dispose() my Eclipse crashes with GPF.
> I noticed that WindowsNegotiateSchemeFactory.create() is called twice, for some reason.
Not sure if this is a normal flow and/or is relevant to the problem.
> 1XMCURTHDINFO  Current thread
> NULL          ----------------------
> 3XMTHREADINFO      "Finalizer thread" J9VMThread:0x0000000003FD1B00, j9thread_t:0x00000000050C1F10,
java/lang/Thread:0x000007FFDE5E2800, state:R, prio=5
> 3XMJAVALTHREAD            (java/lang/Thread getId:0x15, isDaemon:true)
> 3XMTHREADINFO1            (native thread ID:0xCBC, native priority:0x5, native
policy:UNKNOWN, vmstate:R, vm thread flags:0x00000000)
> 3XMTHREADINFO3          Java callstack:
> 4XESTACKTRACE                at com/sun/jna/Native.setPointer(Native Method)
> 4XESTACKTRACE                at com/sun/jna/Pointer.setPointer(Pointer.java:1195)
> 4XESTACKTRACE                at com/sun/jna/Memory.setPointer(Memory.java:658)
> 4XESTACKTRACE                at com/sun/jna/Pointer.setValue(Pointer.java:937)
> 4XESTACKTRACE                at com/sun/jna/Structure.writeField(Structure.java:800)
> 4XESTACKTRACE                at com/sun/jna/Structure.write(Structure.java:718(Compiled
> 4XESTACKTRACE                at com/sun/jna/Structure.autoWrite(Structure.java:1923(Compiled
> 4XESTACKTRACE                at com/sun/jna/Function.convertArgument(Function.java:505(Compiled
> 4XESTACKTRACE                at com/sun/jna/Function.invoke(Function.java:297(Compiled
> 4XESTACKTRACE                at com/sun/jna/Library$Handler.invoke(Library.java:212)
> 4XESTACKTRACE                at com/sun/proxy/$Proxy13.FreeCredentialsHandle(Bytecode
> 4XESTACKTRACE                at org/apache/http/impl/auth/win/WindowsNegotiateScheme.dispose(WindowsNegotiateScheme.java:99)
> 4XESTACKTRACE                at org/apache/http/impl/auth/win/WindowsNegotiateScheme.finalize(WindowsNegotiateScheme.java:117)
> 4XESTACKTRACE                at java/lang/J9VMInternals.runFinalize(J9VMInternals.java:436)
> 3XMTHREADINFO3          No native callstack available on this platform
> Appreciate any help and suggestions.Thank you
> Alex Bernstein

No matter what we might be doing wrong on our end this still looks like
something that should not be happening.

You probably should report the issue to JNA developers.



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