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From "Albert Strasheim (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQCPP-46) ActiveMQConnection doesn't propagate exception listener to underlying connector
Date Thu, 25 Jan 2007 13:53:03 GMT

    [ https://issues.apache.org/activemq/browse/AMQCPP-46?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_37999
] 

Albert Strasheim commented on AMQCPP-46:
----------------------------------------

I did an svn update and got the fix you made to Set.h. I cleaned my solution (release and
debug) and did a batch build.

Still seeing the crash though. Here's how to reproduce it (I hope):

1. Don't run the broker yet.
2. Run the code I provided. It keeps trying to connect to the broker. It prints:

Got an exception: Socket::connect - A request to send or receive data was disallowed because
the socket is not connected and (when sending on a datagram socket using a sendto call) no
address was supplied.

3. Start the broker. The program stops printing.
4. Ctrl-C the broker or Close the command prompt window in which it runs.
5. Wait about 3 seconds.
6. Crash happens.

> ActiveMQConnection doesn't propagate exception listener to underlying connector
> -------------------------------------------------------------------------------
>
>                 Key: AMQCPP-46
>                 URL: https://issues.apache.org/activemq/browse/AMQCPP-46
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>    Affects Versions: 1.1
>            Reporter: Albert Strasheim
>         Assigned To: Nathan Mittler
>             Fix For: 2.0
>
>         Attachments: amqconn-exlistener.diff, main.cpp
>
>
> My program is doing the following:
> # Create connection using ActiveMQConnectionFactory
> # Set a simple exception listener that sets a boolean flag
> # Block in receive on consumer
> If I then kill the broker, various exceptions happen, but they are never sent to the
exception listener, because the exception listener in StompConnector is null. It seems to
me that ActiveMQConnection should set and get its exception listener on its underlying connector
and probably doesn't have to contain a pointer to the listener itself.
> If I change ActiveMQConnection as in the attached patch to also set the exception listener
on the underlying connector, my exception listener gets called when the broker dies.
> Once I detect the failure, I delete the producer, consumer, session and connection that
failed. Looks like an uncaught exception is getting thrown during the destruction of the producer
(which is the first thing I delete when cleaning up). The problem here is probably that the
connection is trying to close down a socket that is already broken and something goes awry.
I'm not quite sure how to fix this problem.
> Stack trace (with useless bits stripped out):
> {noformat}
>  	kernel32.dll!7c812a5b() 	
>  	[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]

>  	kernel32.dll!7c812a5b() 	
> >	myapp.exe!std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > >::_Ucopy<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> *>(std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _First=("..\src\main\activemq\connector\stomp\StompSessionManager.cpp",254),
std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _Last=(<Bad Ptr>,14297048), std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _Ptr=("..\src\main\activemq\connector\stomp\StompSessionManager.cpp",254))
 Line 1105 + 0x18 bytes	C++
>  	myapp.exe!std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > >::operator=(const std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > > & _Right={...})  Line 582 + 0x1d bytes	C++
>  	0012b920()	
>  	myapp.exe!activemq::core::ActiveMQConsumer::close()  Line 84 + 0x34 bytes	C++
>  	msvcr80d.dll!102418b7() 	
>         ...	
>  	kernel32.dll!7c812a5b() 	
>  	myapp.exe!std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > >::_Ucopy<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> *>(std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _First=(<Bad Ptr>,-17891602), std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _Last=(<Bad Ptr>,-17891602), std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _Ptr=(<Bad Ptr>,1886220148))  Line 1105 + 0x18 bytes	C++
>  	myapp!std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > >::operator=(const std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > > & _Right={...})  Line 582 + 0x1d bytes	C++
>  	0012bf74()	
>  	myapp.exe!activemq::core::ActiveMQSession::onDestroySessionResource(activemq::core::ActiveMQSessionResource
* resource=0x00000001)  Line 558 + 0x37 bytes	C++
>  	msvcr80d.dll!10241a10() 	
>         ...	
>  	kernel32.dll!7c812a5b() 	
>  	myapp.exe!std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > >::_Ucopy<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> *>(std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _First=(<Bad Ptr>,1886220148), std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _Last=(<Bad Ptr>,-17891602), std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> * _Ptr=("<<U",4832632))  Line 1105 + 0x18 bytes	C++
>  	myapp.exe!std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > >::operator=(const std::vector<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int>,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,int> > > & _Right={...})  Line 582 + 0x1d bytes	C++
> {noformat}

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