Hi , We are trying interprocess scenario, one process created shared memory objects and killed and second process open the object using find_or_construct seeing this process blocked at getting lock. bt as shown below, #0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 #1 0x00007fa6b6733eb6 in _L_lock_941 () from /lib64/libpthread.so.0 #2 0x00007fa6b6733daf in __GI___pthread_mutex_lock (mutex=mutex@entry=0x7fa6b198b070) at ../nptl/pthread_mutex_lock.c:113 #3 0x0000000001bc3822 in lock (this=0x7fa6b198b070) at /x86/include/boost/interprocess/sync/posix/recursive_mutex.hpp:90 #4 lock (this=0x7fa6b198b070) at /x86/include/boost/interprocess/sync/interprocess_recursive_mutex.hpp:163 #5 scoped_lock (m=..., this=<synthetic pointer>) at /x86/include/boost/interprocess/sync/scoped_lock.hpp:81 #6 boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index>::priv_generic_named_construct<char> (this=0x7fa6b198b010, type=<optimized out>, name=0x7ffde183ca20 "reported_slice_config_list", num=1, try2find=<optimized out>, dothrow=<optimized out>, table=..., index=..., is_intrusive=...) at /x86/include/boost/interprocess/segment_manager.hpp:1076 #7 0x0000000001bee007 in boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index>::priv_generic_construct (this=<optimized out>, name=name@entry=0x7ffde183ca20 "reported_slice_config_list", num=num@entry=1, try2find=try2find@entry=true, dothrow=dothrow@entry=true, table=...) at /x86/include/boost/interprocess/segment_manager.hpp:760 #8 0x0000000001bf112d in generic_construct<boost::container::map<unsigned int, gnb::broadcast_plmn_list, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, gnb::broadcast_plmn_list>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > > > (table=..., dothrow=true, try2find=true, num=1, name=0x7ffde183ca20 "reported_slice_config_list", this=<optimized out>) at /x86/include/boost/interprocess/segment_manager.hpp:704 #9 operator()<std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, gnb::broadcast_plmn_list>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long int, long unsigned int, 0ul>, 0ul>, boost::interprocess::iset_index> >&> (this=<optimized out>) at /x86/include/boost/interprocess/detail/named_proxy.hpp:132 please let me know in which cases this can be occured, we see first process also hangs in termination. -- Regards, Murali Kishore