Dear all, I'm using Boost 1.47 on Linux x86_64 in combination with gcc version 4.5.1. I'm trying to implement a large vector of maps in a memory mapped file. My code works fine on small example cases but crashes randomly when trying to store larger datasets. The application generally runs fine for a few days before a segementation fault occurs which makes debugging very time consuming. A trimmed down version of the code looks like this: typedef boost::interprocess::managed_mapped_file::segment_manager SegmentManager_t; typedef boost::interprocess::allocator<void, SegmentManager_t> VoidAllocator_t; typedef std::pair<const uint,double> MapValue_t; typedef boost::interprocess::allocator<MapValue_t , SegmentManager_t> MapValueAllocator_t; typedef boost::interprocess::map<uint,double,std::less<uint>,MapValueAllocator_t> Map_t; typedef boost::interprocess::allocator<Map_t,SegmentManager_t> MapAllocator_t; typedef boost::interprocess::vector<Map_t,MapAllocator_t> VectorofMaps_t; boost::interprocess::managed_mapped_file m_mfile=managed_mapped_file(open_or_create, TEMPFILEPATH, TEMPFILEPATHSIZE); VoidAllocator_t alloc_inst (m_mfile.get_segment_manager()); VectorofMaps_t* m_pS=m_mfile.construct<VectorofMaps_t>(anonymous_instance)(numsparserows,Map_t(std::less<uint>(),alloc_inst),alloc_inst); I've managed to obtain a stack trace which pinpoints the problem at the use of the function lower_bound: Map_t::iterator mapiter=(*m_pS)[row].lower_bound(col); I realize that such random segfaults could be the result of a hardware problem (memory corruption, cpu overheating, hard drive storing the memory mapped file (ssd)) but stress testing these components has not revealed any problems. I am therefore hoping that somebody would be able to get some more information from the stack trace provided below. Any help or advice on how to identify the problem would be greatly appreciated. Steven #0 0x0000000000720244 in std::less<unsigned int>::operator() (this=0x7fffffffc390, __x=@0x3ff07fcf9f552438, __y=@0x7fffffffc5c0) at /usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_function.h:230 #1 0x0000000000721fc7 in boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > >::operator()<std::pair<unsigned int const, double>, unsigned int> (this=0x7fffffffc390, key1=..., key2=@0x7fffffffc5c0) at /home/smaenhout/c++/boost/include/boost/interprocess/containers/container/detail/tree.hpp:78 #2 0x0000000000721b4f in boost::container::containers_detail::rbtree<unsigned int, std::pair<unsigned int const, double>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> >, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, 0ul>, boost::interprocess::iset_index> >

::key_node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > > >::operator()<boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void> >, unsigned int> (this=0x7fffffffc390, key1=..., key2=@0x7fffffffc5c0) at /home/smaenhout/c++/boost/include/boost/interprocess/containers/container/detail/tree.hpp:337 #3 0x0000000000721747 in boost::intrusive::detail::key_nodeptr_comp<boost::container::containers_detail::rbtree<unsigned int, std::pair<unsigned int const, double>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> >, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > ::key_node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > > >, boost::intrusive::rbtree_impl<boost::intrusive::setopt<boost::intrusive::detail::base_hook_traits<boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void, long, unsigned long, 0u> >, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, true>, (boost::intrusive::link_mode_type)0, boost::intrusive::default_tag, 3>, boost::container::containers_detail::node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > >, boost::container::containers_detail:: rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void, long, unsigned long, 0u> > >, unsigned long, true> > >::operator()<boost::interprocess::offset_ptr<boost::intrusive::compact_rbtree_node<boost::interprocess::offset_ptr<void> >, long, unsigned long, 0u>, unsigned int> (this=0x7fffffffc390, key1=..., key2=@0x7fffffffc5c0) at /home/smaenhout/c++/boost/include/boost/intrusive/detail/utilities.hpp:236 #4 0x00000000007213cc in boost::intrusive::detail::tree_algorithms<boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, true> >::lower_bound<unsigned int, boost::intrusive::detail::key_nodeptr_comp<boost::container::containers_detail::rbtree<unsigned int, std::pair<unsigned int const, double>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> >, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > ::key_node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > > >, boost::intrusive::rbtree_impl<boost::intrusive::setopt<boost::intrusive::detail::base_hook_traits<boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void> >, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0, boost::intrusive::default_tag, 3>, boost::container::containers_detail::node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > >, boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void> > >, unsigned long, true> > > > (header=..., key=@0x7fffffffc5c0, comp=...) at /home/smaenhout/c++/boost/include/boost/intrusive/detail/tree_algorithms.hpp:839 #5 0x0000000000720e32 in boost::intrusive::rbtree_algorithms<boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, true> >::lower_bound<unsigned int, boost::intrusive::detail::key_nodeptr_comp<boost::container::containers_detail::rbtree<unsigned int, std::pair<unsigned int const, double>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> >, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > ::key_node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > > >, boost::intrusive::rbtree_impl<boost::intrusive::setopt<boost::intrusive::detail::base_hook_traits<boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void> >, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0, boost::intrusive::default_tag, 3>, boost::container::containers_detail::node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > >, boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void> > >, unsigned long, true> > > > (header=..., key=@0x7fffffffc5c0, comp=...) at /home/smaenhout/c++/boost/include/boost/intrusive/rbtree_algorithms.hpp:470 #6 0x00000000007207f1 in boost::intrusive::rbtree_impl<boost::intrusive::setopt<boost::intrusive::detail::base_hook_traits<boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void, long, unsigned long, 0u> >, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, true>, (boost::intrusive::link_mode_type)0, boost::intrusive::default_tag, 3>, boost::container::containers_detail::node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > >, boost::container::containers_detail::rbtree_node<std::pair<unsigned int const, double>, boost::interprocess::offset_ptr<void, long, unsigned long, 0u> > >, unsigned long, true> >::lower_bound<unsigned int, boost::container::containers_detail::rbtree<unsigned int, std::pair<unsigned int const, double>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> >, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > ::key_node_compare<boost::container::containers_detail::value_compare_impl<unsigned int, std::pair<unsigned int const, double>, std::less<unsigned int>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> > > > > (this=0x7fc8f21bef08, key=@0x7fffffffc5c0, comp=...) at /home/smaenhout/c++/boost/include/boost/intrusive/rbtree.hpp:1064 #7 0x00000000007202ec in boost::container::containers_detail::rbtree<unsigned int, std::pair<unsigned int const, double>, boost::container::containers_detail::select1st<std::pair<unsigned int const, double> >, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, 0ul>, boost::interprocess::iset_index> > >::lower_bound (this=0x7fc8f21bef00, k=@0x7fffffffc5c0) at /home/smaenhout/c++/boost/include/boost/interprocess/containers/container/detail/tree.hpp:853 #8 0x000000000071fea8 in boost::container::map<unsigned int, double, std::less<unsigned int>, boost::interprocess::allocator<std::pair<unsigned int const, double>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long, unsigned long, 0u>, 0ul>, boost::interprocess::iset_index> > >::lower_bound ( this=0x7fc8f21bef00, x=@0x7fffffffc5c0) at /home/smaenhout/c++/boost/include/boost/interprocess/containers/container/map.hpp:638