>> I built ceph from source ( f859f25d7eaec01fb6a82b88409d005c8177fea2 branch). mkcephfs -a -c /etc/ceph/ceph.conf -k /etc/ceph/keyring.admin -- is working fine, but when I tried to start ceph its showing following error. >strace ceph -a start rt_sigprocmask(SIG_SETMASK, [PIPE], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [PIPE], [PIPE], 8) = 0 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1cc5a49000 mprotect(0x7f1cc5a49000, 4096, PROT_NONE) = 0 clone(child_stack=0x7f1cc6248f70, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM |CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f1cc62499d0, tls=0x7f1cc6249700, child_tidptr=0x7f1cc62499d0) = 21042 rt_sigprocmask(SIG_SETMASK, [PIPE], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [PIPE], [PIPE], 8) = 0 mmap(NULL, 1052672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f1ccaa98000 mprotect(0x7f1ccaa98000, 4096, PROT_NONE) = 0 clone(child_stack=0x7f1ccab97f70, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD| CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f1ccab989d0, tls=0x7f1ccab98700, child_tidptr=0x7f1ccab989d0) = 21043 rt_sigprocmask(SIG_SETMASK, [PIPE], NULL, 8) = 0 futex(0x201b904, FUTEX_WAIT_PRIVATE, 1, NULL -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html