(gdb) bt #0 0x00007f51bcb589db in raise () from /lib64/libpthread.so.0 #1 0x00007f51b9709b57 in reraise_fatal (signum=11) at /usr/src/debug/ceph-12.1.0+git.1499090920.2c11b88d14/src/global/signal_handler.cc:74 #2 handle_fatal_signal (signum=11) at /usr/src/debug/ceph-12.1.0+git.1499090920.2c11b88d14/src/global/signal_handler.cc:138 #3 #4 0x00007f51bcb5a4a0 in __lll_unlock_elision () from /lib64/libpthread.so.0 #5 0x00007f51b94610bf in __gthread_mutex_unlock (__mutex=) at /usr/include/c++/4.8/x86_64-suse-linux/bits/gthr-default.h:778 #6 std::mutex::unlock (this=) at /usr/include/c++/4.8/mutex:152 #7 cohort::lru::TreeX, boost::intrusive::member_hook, void, void, void>, &rgw::RGWFileHandle::fh_hook>, void, void, void, void>, rgw::RGWFileHandle::FhLT, rgw::RGWFileHandle::FhEQ, rgw::fh_key, std::mutex>::insert_latched (flags=2, this=0x1cda538, lat=..., v=0x1d08020) at /usr/src/debug/ceph-12.1.0+git.1499090920.2c11b88d14/src/common/cohort_lru.h:428 #8 rgw::RGWLibFS::lookup_fh (this=this@entry=0x1cda390, parent=parent@entry=0x1cda3b0, name=name@entry=0x1a89c00 "demo-demo", flags=flags@entry=36) at /usr/src/debug/ceph-12.1.0+git.1499090920.2c11b88d14/src/rgw/rgw_file.h:1036 #9 0x00007f51b9448ec1 in rgw::RGWLibFS::stat_bucket (this=this@entry=0x1cda390, parent=parent@entry=0x1cda3b0, path=path@entry=0x1a89c00 "demo-demo", bs=..., flags=flags@entry=0) at /usr/src/debug/ceph-12.1.0+git.1499090920.2c11b88d14/src/rgw/rgw_file.cc:81 #10 0x00007f51b944a18a in rgw_lookup (rgw_fs=, parent_fh=, path=, fh=0x7ffd688e5058, flags=) at /usr/src/debug/ceph-12.1.0+git.1499090920.2c11b88d14/src/rgw/rgw_file.cc:1647 #11 0x00007f51b9a14e13 in lookup_path (export_pub=0x1cda1d0, path=0x1a89c00 "demo-demo", pub_handle=0x7ffd688e52f0, attrs_out=0x7ffd688e5200) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/FSAL/FSAL_RGW/export.c:113 #12 0x000000000053eaf6 in mdcache_lookup_path (exp_hdl=0x1ac0d90, path=0x1a89c00 "demo-demo", handle=0x7ffd688e5478, attrs_out=0x0) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:1839 #13 0x00000000005059b3 in init_export_root (export=0x1a89f38) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/support/exports.c:2246 #14 0x00000000005053c8 in init_export_cb (exp=0x1a89f38, state=0x0) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/support/exports.c:2125 #15 0x00000000005195df in foreach_gsh_export (cb=0x5053ac , state=0x0) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/support/export_mgr.c:714 #16 0x00000000005053e2 in exports_pkginit () at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/support/exports.c:2134 #17 0x000000000045814c in nfs_Init (p_start_info=0x7e1a90 ) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/MainNFSD/nfs_init.c:651 #18 0x0000000000458e40 in nfs_start (p_start_info=0x7e1a90 ) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/MainNFSD/nfs_init.c:947 #19 0x0000000000420094 in main (argc=7, argv=0x7ffd688e5d38) at /usr/src/debug/nfs-ganesha-2.5.025+git.1499329280.f20853f31/MainNFSD/nfs_main.c:489