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From "Michael Osipov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCLIENT-1681) GPF occurs when WindowsNegotiateScheme.dispose() is called by garbage collector
Date Fri, 28 Aug 2015 19:11:45 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-1681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14720420#comment-14720420
] 

Michael Osipov commented on HTTPCLIENT-1681:
--------------------------------------------

Unfortunately, this code has been taken as reference. The author of this code did not read
SSPI documentation thoroughly. This example has several issues.

> 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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