[Ace-users] Thread crash in TAO MProfile code.

[Venkat]

Hello TAO team,

    TAO VERSION: 1.6.1
    ACE VERSION: 5.6.1
    (actually, svn head taken a couple of weeks back)

    HOST MACHINE and OPERATING SYSTEM:
      NetBSD, i386

    TARGET MACHINE and OPERATING SYSTEM, if different from HOST:
    COMPILER NAME AND VERSION (AND PATCHLEVEL):
             NetBSD, i386

    THE $ACE_ROOT/ace/config.h FILE [if you use a link to a platform-
    specific file, simply state which one]:
             generation via autoconf

    THE $ACE_ROOT/include/makeinclude/platform_macros.GNU FILE [if you
    use a link to a platform-specific file, simply state which one
    (unless this isn't used in this case, e.g., with Microsoft Visual
    C++)]:
          n/a

    CONTENTS OF $ACE_ROOT/bin/MakeProjectCreator/config/
default.features
    (used by MPC when you generate your own makefiles):
             ssl

    AREA/CLASS/EXAMPLE AFFECTED:

    DOES THE PROBLEM AFFECT:
        COMPILATION? no
        LINKING? no
        EXECUTION? Yes

    SYNOPSIS:

        Thread crash in TAO codebase.

    DESCRIPTION:

Client is getting service from Server; both are on different nodes.
Server crashes and restarts. During the period Server is not
available, Client keeps calling Server, and consumes any exceptions
due to server is not available. This is happening in the context
SSLIOP protocol underneath. I'm seeing the following thread crash on
client side. It's very temporal. I'm not seeing any way to reproduce.
Any clue from the following stack trace?
Any feedback is helpful.

    Program terminated with signal 11, Segmentation fault.  // null
pointer due to .....?
(gdb) where
   #0  TAO_Default_Endpoint_Selector::select_endpoint (this=Variable
"this" is not available.) at MProfile.inl:65
#1  0x00007f7ff97f6b6e in TAO::Profile_Transport_Resolver::resolve
(this=0x7f7ff3dfe440,max_time_val=0x7f7ff3dfe480)
    at ../../../TAO/tao/Profile_Transport_Resolver.cpp:88#2
0x00007f7ff97cccd7 in TAO::Invocation_Adapter::invoke_remote_i
(this=0x7f7ff3dfe670, stub=Variable "stub" is not available.)
    at ../../../TAO/tao/Invocation_Adapter.cpp:247
#3  0x00007f7ff97cd730 in TAO::Invocation_Adapter::invoke_i
(this=0x7f7ff3dfe670, stub=0x7d8000,
    details=@0x7f7ff3dfe570) at ../../../TAO/tao/
Invocation_Adapter.cpp:92
#4  0x00007f7ff97cd372 in TAO::Invocation_Adapter::invoke
(this=0x7f7ff3dfe670, ex_data=0x0, ex_count=0)
    at ../../../TAO/tao/Invocation_Adapter.cpp:50

    REPEAT BY:
           It's a temporal behavior. Hard to reproducem, but has been
seen a couple of times.

    SAMPLE FIX/WORKAROUND:
           None, as it is not clear how to reproduce.

Thanks
Venkat