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https://issues.apache.org/jira/browse/HTTPCLIENT-1681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14720594#comment-14720594
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Daniel Doubrovkine commented on HTTPCLIENT-1681:
------------------------------------------------
Michael, first thanks for hanging on to this. My goal is to remove any bad
information on code.dblock.org and to open and fix any waffle issues if such
exist and, finally, to help the Apache community make any fixes, if possible.
I've read all the links 3 times and I have specific questions, please explain
to me like a 2 yo :)
1) I understand there's an issue disposing of resources in a garbage collector,
as in it leads to crashes. That's a real problem, but I am not sure I agree
that anything should be done about it because we're mixing native and GCed and
maybe the right thing to do with native code is to not force expectations on it
of GCed environments, but the other way around? It's a real problem, but it's
not a problem of "the author of this code did not read SSPI documentation", I
am not taking it personally at all as the author, just trying to separate
things and fix them - I think the SSPI documentation is crazy anyway :)
2) "The author of this code did not read SSPI documentation thoroughly. This
example has several issues." - what are those issues? If you feel generous,
just PR the fixes into
https://github.com/dblock/code.dblock.org/blob/gh-pages/_posts/2010/2010-03-26-jna-acquirecredentialshandle-initializesecuritycontext-and-acceptsecuritycontext-establishing-an-authenticated-connection.markdown,
or at least point them out?
3) Does waffle have any of the issues described in (1)? Do those issues have an
issue on https://github.com/dblock/waffle?
> GPF occurs when WindowsNegotiateScheme.dispose() is called by garbage
> collector
> -------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1681
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1681
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Affects Versions: 4.5
> Environment: Windows 7
> Reporter: Alexander Bernstein
>
> I am using WindowsNegotiateScheme (created by WindowsNegotiateSchemeFactory)
> to have my client authenticate using SPNEGO.
> During the auth dance, several instances of WindowsNegotiateScheme are
> created. At a later time (arbitrary) these objects are finalized by GC, which
> causes a GPF and a crash.
> 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 Code))
> 4XESTACKTRACE at
> com/sun/jna/Structure.autoWrite(Structure.java:1923(Compiled Code))
> 4XESTACKTRACE at
> com/sun/jna/Function.convertArgument(Function.java:505(Compiled Code))
> 4XESTACKTRACE at
> com/sun/jna/Function.invoke(Function.java:297(Compiled Code))
> 4XESTACKTRACE at
> com/sun/jna/Library$Handler.invoke(Library.java:212)
> 4XESTACKTRACE at
> com/sun/proxy/$Proxy13.FreeCredentialsHandle(Bytecode PC:18)
> 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
> NULL
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