[QPID-4199] "qpid::TransportFailure" exception leak in AutoCancel destructor

• Type: Bug
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 0.6, 0.8, 0.10, 0.12, 0.13, 0.14, 0.15, 0.16
• Component/s: C++ Client
• Labels: api-change

Environment

Linux g++

• Assignee: Unassigned
• Reporter: Ravi Trivedi
• Created: 09/Aug/12 14:46
• Updated: 26/Oct/15 00:30

Description

=== Code ====

SubscriptionManager subscriptions(session);
subscriptions.get(response, queue,
timeout * TIME_SEC);

when the connection to qpid is lost during the wait period client application gets crashed with following exception

terminate called after throwing an instance of 'qpid::TransportFailure'
what():
aborted

==== GDB Backtrace output ====

Starting program: /home/vmware/Desktop/qpidc-0.6/examples/direct/direct_producer
[Thread debugging using libthread_db enabled]
[New Thread 0x7f349456c780 (LWP 5097)]
[New Thread 0x425b3950 (LWP 5100)]
2012-08-09 16:39:09 warning Connection closed
terminate called after throwing an instance of 'qpid::TransportFailure'
what(): Connection closed

Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7f349456c780 (LWP 5097)]
0x00007f34930c75c5 in raise () from /lib64/libc.so.6
(gdb) bt full
#0 0x00007f34930c75c5 in raise () from /lib64/libc.so.6
No symbol table info available.
#1 0x00007f34930c8bb3 in abort () from /lib64/libc.so.6
No symbol table info available.
#2 0x00007f34939231d4 in _gnu_cxx::_verbose_terminate_handler () from /usr/lib64/libstdc++.so.6
No symbol table info available.
#3 0x00007f34939215f6 in ?? () from /usr/lib64/libstdc++.so.6
No symbol table info available.
#4 0x00007f34939207eb in ?? () from /usr/lib64/libstdc++.so.6
No symbol table info available.
#5 0x00007f34939213b8 in __gxx_personality_v0 () from /usr/lib64/libstdc++.so.6
No symbol table info available.
#6 0x00007f34933fece3 in ?? () from /lib64/libgcc_s.so.1
No symbol table info available.
#7 0x00007f34933feda8 in _Unwind_Resume () from /lib64/libgcc_s.so.1
No symbol table info available.
#8 0x0000000000405333 in qpid::client::AutoCancel::~AutoCancel ()
No locals.
#9 0x00007f3493c22369 in qpid::client::SubscriptionManagerImpl::get (this=0x823000, result=@0x7fff9c58d060, queue=@0x7fff9c58d070,
timeout=<value optimized out>) at qpid/client/SubscriptionManagerImpl.cpp:128
lq = {<qpid::client::Handle<qpid::client::LocalQueueImpl>> =

{impl = 0x822ee0}

, <No data fields>}
unique = {static npos = 18446744073709551615,
_M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> =

{<No data fields>}, <No data fields>},
_M_p = 0x6104e8 "dbd23f8c-061e-41c1-bee5-a5712fbece52"}}
sm = {<qpid::sys::Runnable> = {_vptr.Runnable = 0x7f3493ee0e50}, <qpid::client::Handle<qpid::client::SubscriptionManagerImpl>> = {impl = 0x823000},
static UNLIMITED = <optimized out>}
ac = {sm = @0x7fff9c58cf70, tag = {static npos = 18446744073709551615,
_M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}

, <No data fields>},
_M_p = 0x6104e8 "dbd23f8c-061e-41c1-bee5-a5712fbece52"}}}
#10 0x0000000000404c38 in main ()
No locals.

======= Bug description =======

get() method of subscriptionmanager class registers for the AutoCancel. During the Destruction of AutoCancel class object
( goes out of scope due to the return of get() or other exception in get() ) if the connection to the qpid is lost or not available,
"qpid::TransportFailure" exception is being thrown somewhere from inside the SubscriptionManager::Cancel()
As the execption is not handled in the destructor and can not propagate beyond destructor ( Execption leak ), eventually leads to termination of the application

Just for the confirmation I tried to handle the exception in ~AutoCancel() and it worked , application was able to survive.

~AutoCancel() {

try

{ sm->cancel() }

catch ( qpid::TransportFailure& Ex)

{ std::cout<< " Inside ~AutoCancel() " <<Ex.what()<<std::endl; }

}

This was produced in the 0.6 version but by looking at the code of 0.16 I believe this problem is present the latest version also.

Issue Links

• relates to: QPID-6811 Client API throws exception from destructors causing applications to terminate