application crashes in RFA Lib files (C++, Linux)

we found our binary coredump in RFA dynamic library file. Following is the call stack information in the core file. The error was raised in Thread #1, and as you can see from the stack information, this Thread is all RFA LIB code.

The RFA LIB version we are using is rfa_v7.6.l1 for Linux.

(gdb) info thread
  Id   Target Id         Frame 
  2    Thread 0x7f1067810880 (LWP 10431) 0x00007f1064d5fab2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib64/libpthread.so.0
* 1    Thread 0x7f1040e39700 (LWP 10445) 0x00007f1062e4c5d7 in raise () from /lib64/libc.so.6
(gdb) bt
#0  0x00007f1062e4c5d7 in raise () from /lib64/libc.so.6
#1  0x00007f1062e4dcc8 in abort () from /lib64/libc.so.6
#2  0x00007f10671da33d in __RFA_ProblemReport () from /usr/local/lib/libRFA_Common.so
#3  0x00007f1065e038ce in rfa::support::Thread::startWrapper(void*) () from /usr/local/lib/libRFA_SessionLayer.so
#4  0x00007f1064d5bdf5 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f1062f0d1ad in clone () from /lib64/libc.so.6
(gdb) thread 2
[Switching to thread 2 (Thread 0x7f1067810880 (LWP 10431))]
#0  0x00007f1064d5fab2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00007f1064d5fab2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f10671d9d96 in rfa::support::ConditionVariable::wait(long, long) () from /usr/local/lib/libRFA_Common.so
#2  0x00007f10671cfe87 in rfa::common::EventQueueImpl::dispatch(long) () from /usr/local/lib/libRFA_Common.so
#3  0x0000000000445976 in ?? ()
#4  0x00000000006225da in ?? ()
#5  0x0000000000445a67 in ?? ()
#6  0x000000000043949a in ?? ()
#7  0x00007f1062e38af5 in __libc_start_main () from /lib64/libc.so.6
#8  0x000000000041dce9 in ?? ()

We've checked there is no exception in our application log. The following is the error reported by RFA LIB's own error log:

$ cat RFA_000028BF_00000000_20180622_083002.log
RFA Internal failure

Application: RFA
Process Id: 0x28BF

File: Support/OS/Impl/Thread.cpp
Line: 59

Problem:
	Unhandled exception caught

Can anyone help me how to fix this issue?