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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQCPP-231) Segmentation fault in APR
Date Tue, 05 May 2009 19:31:38 GMT

    [ https://issues.apache.org/activemq/browse/AMQCPP-231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=51517#action_51517
] 

Timothy Bish commented on AMQCPP-231:
-------------------------------------

Currently there are some edge cases where the client can segfault on a close of a consumer,
especially if in a transacted session.  The code for the Consumer was rewritten in the 3.0
baseline and should be much less likely to encounter issues although there are still some
deficiencies dealing with transactions.  

If you can capture a complete backtrace of all the threads when the application dumps core
and attach that it would help to narrow down possibly where the error is occurring.

> Segmentation fault in APR
> -------------------------
>
>                 Key: AMQCPP-231
>                 URL: https://issues.apache.org/activemq/browse/AMQCPP-231
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>          Components: Openwire
>    Affects Versions: 2.2.4
>         Environment: RHEL 5.2 , ActiveMQ 5.2.0
>            Reporter: Sebastien SOILEN
>            Assignee: Timothy Bish
>
> We get this segmentation fault occasionally with a monitoring script which establishes
and closes a connection to the broker.
> Here is the used script:
> {quote}
>     import sys
>     from pyactivemq import *
>     broker = "tcp://127.0.0.1:61616?connection.closeTimeout=1000&connection.sendTimeout=5000&connection.socketBufferSize=128*1024"
>     def check_broker():
>     try:
>     f = pyactivemq.ActiveMQConnectionFactory(broker)
>     c = f.createConnection()
>     c.start()
>     c.stop()
>     c.close()
>     sys.exit(0)
>     except Exception, e:
>     sys.stderr.write("Erreur activeMQ: "+str(e))
>     sys.exit(1)
>     check_broker()
> {quote}
> Here are the full traces:
> {quote}
> Core was generated by `python /etc/init.d/appli_ccss.py status'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x00210bf7 in apr_atomic_add32 (mem=0x87c010c, val=1) at atomic/unix/mutex.c:78
> 78	    apr_thread_mutex_t *mutex = hash_mutex[ATOMIC_HASH(mem)];
> (gdb) thread apply all bt full
> Thread 4 (process 13751):
> #0  0x00d97940 in __gnu_cxx::stdio_sync_filebuf<wchar_t, std::char_traits<wchar_t>
>::file () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #1  0x00d99502 in std::ostream::flush () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #2  0x00d61bb1 in std::ios_base::Init::~Init () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #3  0x00d77150 in std::basic_ios<char, std::char_traits<char> >::copyfmt
() from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #4  0x005029c9 in exit () from /lib/libc.so.6
> No symbol table info available.
> #5  0x00707a42 in Py_Exit () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #6  0x00707b12 in Py_Exit () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #7  0x00707d29 in PyErr_PrintEx () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #8  0x00707f5e in PyErr_Print () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #9  0x00708141 in PyRun_SimpleFileExFlags () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #10 0x007088ca in PyRun_AnyFileExFlags () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #11 0x0070f2d5 in Py_Main () from /usr/lib/libpython2.4.so.1.0
> No symbol table info available.
> #12 0x080485b2 in main ()
> No symbol table info available.
> Thread 3 (process 13772):
> #0  0x00434402 in __kernel_vsyscall ()
> No symbol table info available.
> #1  0x0062de1b in read () from /lib/libpthread.so.0
> No symbol table info available.
> #2  0x0020894a in apr_socket_recv (sock=0x894ccb8, buf=0x8954bc8 "", len=0xb7ad30c0)
at /usr/include/bits/unistd.h:35
> 	rv = <value optimized out>
> 	arv = <value optimized out>
> #3  0x011548d9 in decaf::net::SocketInputStream::read (this=0x8947018, buffer=0x8954bc8
"", offset=0, bufferSize=1)
>     at decaf/net/SocketInputStream.cpp:180
> 	size = 1
> 	result = <value optimized out>
> #4  0x01174a01 in decaf::io::BufferedInputStream::bufferData (this=0x893f240) at decaf/io/BufferedInputStream.cpp:260
> 	available = 0
> 	bytesRead = <value optimized out>
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0xdc9731 "\203Ä\004[]Ã\220\220\220\220\220\220\220\220\220U\211åS\203ì\004\213E\bèèÅøÿ\201Ã\205\016\003"}},

>     cause = 0x884dee8, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x13b544c, _M_finish = 0xb7ad3148, 
>           _M_end_of_storage = 0x11e2093}}, <No data fields>}}, <No data fields>}
> #5  0x01174f81 in decaf::io::BufferedInputStream::read (this=0x893f240, targetBuffer=0xb7ad31f4
"", offset=0, 
>     targetBufferSize=4) at decaf/io/BufferedInputStream.cpp:181
> 	bytesToCopy = 0
> 	totalRead = 0
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0xffffffff <Address 0xffffffff out of bounds>}}, cause = 0x0, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x6, _M_finish = 0x13a1860, 
>           _M_end_of_storage = 0x884dee8}}, <No data fields>}}, <No data fields>}
> #6  0x01178998 in decaf::io::DataInputStream::readInt (this=0x8972228) at decaf/io/DataInputStream.h:360
> 	buffer = "\000\000\000"
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0x6 <Address 0x6 out of bounds>}}, cause = 0xb7ad325c, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0xb7ad3228, _M_finish = 0x12e7780, 
>           _M_end_of_storage = 0x884dee8}}, <No data fields>}}, <No data fields>}
> #7  0x010e021e in activemq::connector::openwire::OpenWireFormat::unmarshal (this=0x896d8d8,
dis=0x8972228)
>     at activemq/connector/openwire/OpenWireFormat.cpp:227
> 	data = <value optimized out>
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0xb7ad3278 "Ø2­- ï®\021\001°à\226\bèÞ\204\b`\030:\001"}}, cause
= 0x10e7a2d, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x8949d10, _M_finish = 0x884dee8, 
>           _M_end_of_storage = 0x13a3638}}, <No data fields>}}, <No data fields>}
> #8  0x010e5461 in activemq::connector::openwire::OpenWireCommandReader::readCommand (this=0x8949d8c)
>     at activemq/connector/openwire/OpenWireCommandReader.cpp:71
> 	ex = {<decaf::io::IOException> = {<decaf::lang::Exception> = {<decaf::lang::Throwable>
= {<> = {<No data fields>}, <No data fields>}, message = {static npos =
4294967295, 
>         _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>           _M_p = 0x0}}, cause = 0x0, 
>       stackTrace = {<std::_Vector_base<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> > >> = {
>           _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, 
>             _M_end_of_storage = 0x0}}, <No data fields>}}, <No data fields>},
<No data fields>}
> #9  0x01114a9a in activemq::transport::IOTransport::run (this=0x8925f30) at activemq/transport/IOTransport.cpp:188
> 	command = (class activemq::transport::Command *) 0x884dee8
> #10 0x011691b8 in decaf::lang::Thread::runCallback (self=0x88e8398, param=0x8976388)
at decaf/lang/Thread.cpp:125
> No locals.
> #11 0x0020e736 in dummy_worker (opaque=0x88e8398) at threadproc/unix/thread.c:142
> No locals.
> #12 0x0062745b in start_thread () from /lib/libpthread.so.0
> No symbol table info available.
> #13 0x005a7c4e in clone () from /lib/libc.so.6
> No symbol table info available.
> Thread 2 (process 13781):
> #0  0x00434402 in __kernel_vsyscall ()
> No symbol table info available.
> #1  0x0062de1b in read () from /lib/libpthread.so.0
> No symbol table info available.
> #2  0x0020894a in apr_socket_recv (sock=0x8992958, buf=0x8980260 "", len=0xb66d10c0)
at /usr/include/bits/unistd.h:35
> 	rv = <value optimized out>
> 	arv = <value optimized out>
> #3  0x011548d9 in decaf::net::SocketInputStream::read (this=0x8980050, buffer=0x8980260
"", offset=0, bufferSize=1)
>     at decaf/net/SocketInputStream.cpp:180
> 	size = 1
> 	result = <value optimized out>
> #4  0x01174a01 in decaf::io::BufferedInputStream::bufferData (this=0x89801a0) at decaf/io/BufferedInputStream.cpp:260
> 	available = 0
> 	bytesRead = <value optimized out>
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0x5fd558 "double free or corruption (fasttop)"}}, cause = 0x89c4d50, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x13a3638, _M_finish = 0x89c4d54, 
>           _M_end_of_storage = 0x12dc420}}, <No data fields>}}, <No data fields>}
> #5  0x01174f81 in decaf::io::BufferedInputStream::read (this=0x89801a0, targetBuffer=0xb66d11f4
"", offset=0, 
>     targetBufferSize=4) at decaf/io/BufferedInputStream.cpp:181
> 	bytesToCopy = 0
> 	totalRead = 0
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0x89d2764 ""}}, cause = 0x13b544c, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0xb66d11b8, _M_finish = 0xdfa5d4, 
>           _M_end_of_storage = 0x62db51}}, <No data fields>}}, <No data fields>}
> #6  0x01178998 in decaf::io::DataInputStream::readInt (this=0x89b8100) at decaf/io/DataInputStream.h:360
> 	buffer = "\000\000\000"
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0x89d2760 " '\235\b"}}, cause = 0xb66d1b90, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0xb66d1b90, _M_finish = 0x2038e0, 
>           _M_end_of_storage = 0x899ce1c}}, <No data fields>}}, <No data fields>}
> #7  0x010e021e in activemq::connector::openwire::OpenWireFormat::unmarshal (this=0x89b3730,
dis=0x89b8100)
>     at activemq/connector/openwire/OpenWireFormat.cpp:227
> 	data = <value optimized out>
> 	ex = {<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> =
{<No data fields>}, <No data fields>}, message = {
>       static npos = 4294967295, 
>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0xb66d1278 "Ø\022m¶Ç®\021\001(Í\231\bPM\234\bÈ\022m¶"}}, cause
= 0x117f6cf, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x899ce18, _M_finish = 0x89c4700, 
>           _M_end_of_storage = 0x884deb4}}, <No data fields>}}, <No data fields>}
> #8  0x010e5461 in activemq::connector::openwire::OpenWireCommandReader::readCommand (this=0x899ee44)
>     at activemq/connector/openwire/OpenWireCommandReader.cpp:71
> 	ex = {<decaf::io::IOException> = {<decaf::lang::Exception> = {<decaf::lang::Throwable>
= {<> = {<No data fields>}, <No data fields>}, message = {static npos =
4294967295, 
>         _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>           _M_p = 0x0}}, cause = 0x0, 
>       stackTrace = {<std::_Vector_base<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> > >> = {
>           _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, 
>             _M_end_of_storage = 0x0}}, <No data fields>}}, <No data fields>},
<No data fields>}
> #9  0x01114a9a in activemq::transport::IOTransport::run (this=0x897fd70) at activemq/transport/IOTransport.cpp:188
> 	command = (class activemq::transport::Command *) 0x89c4d50
> #10 0x011691b8 in decaf::lang::Thread::runCallback (self=0x88e83d8, param=0x89bc260)
at decaf/lang/Thread.cpp:125
> No locals.
> #11 0x0020e736 in dummy_worker (opaque=0x88e83d8) at threadproc/unix/thread.c:142
> No locals.
> #12 0x0062745b in start_thread () from /lib/libpthread.so.0
> No symbol table info available.
> #13 0x005a7c4e in clone () from /lib/libc.so.6
> No symbol table info available.
> Thread 1 (process 13776):
> #0  0x00210bf7 in apr_atomic_add32 (mem=0x87c010c, val=1) at atomic/unix/mutex.c:78
> 	old_value = 0
> 	mutex = <value optimized out>
> #1  0x00210c65 in apr_atomic_inc32 (mem=0x87c010c) at atomic/unix/mutex.c:132
> No locals.
> #2  0x01186460 in decaf::util::concurrent::atomic::AtomicInteger::getAndIncrement (this=0x87c0108)
>     at decaf/util/concurrent/atomic/AtomicInteger.cpp:54
> No locals.
> #3  0x01119713 in activemq::transport::filters::ResponseCorrelator::oneway (this=0x87c00e8,
command=0xb70d2074)
>     at activemq/transport/filters/ResponseCorrelator.cpp:51
> 	ex = {<decaf::io::IOException> = {<decaf::lang::Exception> = {<decaf::lang::Throwable>
= {<> = {<No data fields>}, <No data fields>}, message = {static npos =
4294967295, 
>         _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>           _M_p = 0x1 <Address 0x1 out of bounds>}}, cause = 0x20, 
>       stackTrace = {<std::_Vector_base<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> > >> = {
>           _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x617150, _M_finish = 0x0, 
>             _M_end_of_storage = 0x1}}, <No data fields>}}, <No data fields>},
<No data fields>}
> #4  0x010e7ff3 in activemq::connector::openwire::OpenWireFormatNegotiator::oneway (this=0x896e0b0,
command=0xb70d2074)
>     at activemq/connector/openwire/OpenWireFormatNegotiator.cpp:75
> 	ex = {<decaf::io::IOException> = {<decaf::lang::Exception> = {<decaf::lang::Throwable>
= {<> = {<No data fields>}, <No data fields>}, message = {static npos =
4294967295, 
>         _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>           _M_p = 0x884ff4c "lY\234\b"}}, cause = 0x89c5944, 
>       stackTrace = {<std::_Vector_base<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> > >> = {
>           _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x6, _M_finish = 0x10, 
>             _M_end_of_storage = 0x884ff48}}, <No data fields>}}, <No data fields>},
<No data fields>}
> #5  0x010e8d72 in activemq::connector::openwire::OpenWireConnector::oneway (this=0x8949d10,
command=0xb70d2074)
>     at activemq/connector/openwire/OpenWireConnector.cpp:1495
> 	ex = {<activemq::connector::ConnectorException> = {<activemq::exceptions::ActiveMQException>
= {<cms::CMSException> = {<> = {<No data fields>}, <No data fields>},
<decaf::lang::Exception> = {<decaf::lang::Throwable> = {<> = {<No data
fields>}, <No data fields>}, message = {static npos = 4294967295, 
>           _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>             _M_p = 0x0}}, cause = 0x6, 
>         stackTrace = {<std::_Vector_base<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> > >> = {
>             _M_impl = {<std::allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0x13b544c, _M_finish = 0x11e3ce0, 
>               _M_end_of_storage = 0x897f9b0}}, <No data fields>}}, <No data
fields>}, <No data fields>}, <No data fields>}
> #6  0x010ea560 in activemq::connector::openwire::OpenWireConnector::acknowledge (this=0x8949d10,
session=0x897ea78, 
>     consumer=0x897f870, message=0x89c5550, ackType=<value optimized out>)
>     at activemq/connector/openwire/OpenWireConnector.cpp:916
> 	ack = {<activemq::connector::openwire::commands::BaseCommand<activemq::transport::Command>>
= {<activemq::transport::Command> = {
>       _vptr.Command = 0x13ab268}, <activemq::connector::openwire::commands::BaseDataStructure>
= {<activemq::connector::openwire::commands::DataStructure> = {<activemq::connector::openwire::marshal::MarshalAware>
= {
>           _vptr.MarshalAware = 0x13ab2ec}, <No data fields>}, <No data fields>},
responseRequired = false, commandId = 0}, 
>   destination = 0x884dea8, transactionId = 0x0, consumerId = 0x884dee0, ackType = 2 '\002',
firstMessageId = 0x89c52a0, 
>   lastMessageId = 0x884ff28, messageCount = 1, static ID_MESSAGEACK = <optimized out>}
> 	ex = <value optimized out>
> 	ex = <value optimized out>
> #7  0x01077ded in activemq::core::ActiveMQConsumer::acknowledge (this=0x897f8a8, message=0x89c5608,
ackType=2)
>     at activemq/core/ActiveMQConsumer.cpp:458
> 	ex = {<cms::CMSException> = {<> = {<No data fields>}, <No data
fields>}, <decaf::lang::Exception> = {<decaf::lang::Throwable> = {<>
= {<No data fields>}, <No data fields>}, message = {static npos = 4294967295,

>       _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>>
= {<No data fields>}, <No data fields>}, 
>         _M_p = 0x1d3550 "U\211åWVS\203ì\f\213E\bè6(ÿÿ\201ÃÏš\001"}}, cause =
0x8d6f78, 
>     stackTrace = {<std::_Vector_base<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> > >> = {
>         _M_impl = {<std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, int> >> = {<__gnu_cxx::new_allocator<std::pair<std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, int> >> = {<No
data fields>}, <No data fields>}, _M_start = 0xb7b00c6c, _M_finish = 0x89c5ae8, 
>           _M_end_of_storage = 0xb70d2178}}, <No data fields>}}, <No data fields>}
> #8  0x0107825c in activemq::core::ActiveMQConsumer::afterMessageIsConsumed (this=0x897f8a8,
message=0x89c5608, 
>     messageExpired=false) at activemq/core/ActiveMQConsumer.cpp:408
> No locals.
> #9  0x0107901f in activemq::core::ActiveMQConsumer::dispatch (this=0x897f8a8, data=@0x89c5a80)
>     at activemq/core/ActiveMQConsumer.cpp:492
> 	message = (class activemq::core::ActiveMQMessage *) 0x89c5608
> #10 0x010921d5 in activemq::core::ActiveMQSessionExecutor::dispatch (this=0x897ed48,
data=@0x89c5a80)
>     at activemq/core/ActiveMQSessionExecutor.cpp:185
> 	lock_W = {_vptr.Lock = 0x139f470, locked = false, syncObject = 0x897ec20}
> #11 0x01093801 in activemq::core::ActiveMQSessionExecutor::dispatchAll (this=0x897ed48)
>     at activemq/core/ActiveMQSessionExecutor.cpp:266
> 	lock_W = {_vptr.Lock = 0x139f470, locked = false, syncObject = 0x897ed60}
> 	dataList = {<std::_List_base<activemq::core::DispatchData,std::allocator<activemq::core::DispatchData>
>> = {
>     _M_impl = {<std::allocator<std::_List_node<activemq::core::DispatchData>
>> = {<__gnu_cxx::new_allocator<std::_List_node<activemq::core::DispatchData>
>> = {<No data fields>}, <No data fields>}, _M_node = {_M_next = 0x89c5a78,

>         _M_prev = 0x89c5a78}}}, <No data fields>}
> 	lock_W = {_vptr.Lock = 0x139f470, locked = true, syncObject = 0x897ed80}
> #12 0x01093e2f in activemq::core::ActiveMQSessionExecutor::run (this=0x897ed48)
>     at activemq/core/ActiveMQSessionExecutor.cpp:208
> No locals.
> #13 0x011691b8 in decaf::lang::Thread::runCallback (self=0x88e83b8, param=0x897f778)
at decaf/lang/Thread.cpp:125
> No locals.
> #14 0x0020e736 in dummy_worker (opaque=0x88e83b8) at threadproc/unix/thread.c:142
> No locals.
> #15 0x0062745b in start_thread () from /lib/libpthread.so.0
> No symbol table info available.
> #16 0x005a7c4e in clone () from /lib/libc.so.6
> No symbol table info available.
> {quote}

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