Hi, When using V2.8-dev.28 saw the following crash. Had set NOFILE to 1024 for testing and clients (mounted export with NFSv3) were acquiring many locks. (gdb) bt #0 0x00007f26b719a5d7 in raise () from /lib64/libc.so.6 #1 0x00007f26b719bcc8 in abort () from /lib64/libc.so.6 #2 0x00007f26b7193546 in __assert_fail_base () from /lib64/libc.so.6 #3 0x00007f26b71935f2 in __assert_fail () from /lib64/libc.so.6 #4 0x00007f26b9592782 in getclnthandle (host=0x7f26b99b8e34 "localhost", nconf=0x7f267c002960, targaddr=0x7f26ae4c7b10) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/rpcb_clnt.c:350 #5 0x00007f26b9593166 in __rpcb_findaddr_timed (program=100024, version=1, nconf=0x7f267c002960, host=0x7f26b99b8e34 "localhost", clpp=0x7f26ae4c7bb0, tp=0x0) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/rpcb_clnt.c:683 #6 0x00007f26b95843ca in clnt_tp_ncreate_timed (hostname=0x7f26b99b8e34 "localhost", prog=100024, vers=1, nconf=0x7f267c002960, tp=0x0) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/clnt_generic.c:265 #7 0x00007f26b9584271 in clnt_ncreate_timed (hostname=0x7f26b99b8e34 "localhost", prog=100024, vers=1, netclass=0x7f26b99b8e30 "tcp", tp=0x0) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/clnt_generic.c:196 #8 0x00007f26b995b4bb in clnt_ncreate (hostname=0x7f26b99b8e34 "localhost", prog=100024, vers=1, nettype=0x7f26b99b8e30 "tcp") at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/ntirpc/rpc/clnt.h:396 #9 0x00007f26b995b6ef in nsm_connect () at /usr/src/debug/nfs-ganesha-2.8-dev.28/Protocols/NLM/nsm.c:58 #10 0x00007f26b995bd4a in nsm_monitor (host=0x7f267c002250) at /usr/src/debug/nfs-ganesha-2.8-dev.28/Protocols/NLM/nsm.c:118 #11 0x00007f26b989dc1d in get_nsm_client (care=CARE_MONITOR, xprt=0x7f269c000b60, caller_name=0x7f267c001480 "ss_bignode_cl1") at /usr/src/debug/nfs-ganesha-2.8-dev.28/SAL/nlm_owner.c:1014 #12 0x00007f26b995a594 in nlm_process_parameters (req=0x7f267c000a00, exclusive=true, alock=0x7f267c0011f0, plock=0x7f26ae4c8970, ppobj=0x7f26ae4c91b8, care=CARE_MONITOR, ppnsm_client=0x7f26ae4c89a8, ppnlm_client=0x7f26ae4c89a0, ppowner=0x7f26ae4c8998, block_data=0x7f26ae4c8968, nsm_state=11, state=0x7f26ae4c8990) at /usr/src/debug/nfs-ganesha-2.8-dev.28/Protocols/NLM/nlm_util.c:291 #13 0x00007f26b9955888 in nlm4_Lock (args=0x7f267c0011d8, req=0x7f267c000a00, res=0x7f267c001260) at /usr/src/debug/nfs-ganesha-2.8-dev.28/Protocols/NLM/nlm_Lock.c:105 #14 0x00007f26b980ee63 in nfs_rpc_process_request (reqdata=0x7f267c000a00) at /usr/src/debug/nfs-ganesha-2.8-dev.28/MainNFSD/nfs_worker_thread.c:1484 #15 0x00007f26b980f2e5 in nfs_rpc_valid_NLM (req=0x7f267c000a00) at /usr/src/debug/nfs-ganesha-2.8-dev.28/MainNFSD/nfs_worker_thread.c:1633 #16 0x00007f26b95a12fb in svc_vc_decode (req=0x7f267c000a00) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/svc_vc.c:827 #17 0x00007f26b959d797 in svc_request (xprt=0x7f269c000b60, xdrs=0x7f267c001600) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/svc_rqst.c:793 #18 0x00007f26b95a120c in svc_vc_recv (xprt=0x7f269c000b60) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/svc_vc.c:800 #19 0x00007f26b959d718 in svc_rqst_xprt_task (wpe=0x7f269c000d80) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/svc_rqst.c:774 #20 0x00007f26b959e020 in svc_rqst_epoll_loop (wpe=0x9c84c0) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/svc_rqst.c:1089 #21 0x00007f26b95a6aaf in work_pool_thread (arg=0x7f26a4000ef0) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/work_pool.c:184 #22 0x00007f26b7b56df5 in start_thread () from /lib64/libpthread.so.0 #23 0x00007f26b725b1ad in clone () from /lib64/libc.so.6 (gdb) f 4 #4 0x00007f26b9592782 in getclnthandle (host=0x7f26b99b8e34 "localhost", nconf=0x7f267c002960, targaddr=0x7f26ae4c7b10) at /usr/src/debug/nfs-ganesha-2.8-dev.28/libntirpc/src/rpcb_clnt.c:350 350 assert(client == NULL); (gdb) p/x client $1 = 0x7f267c00bc60 Have posted a patch with possible fix for this crash at the following link. If this fix does not look appropriate then please suggest another fix for this issue. Thank you. https://github.com/nfs-ganesha/ntirpc/pull/172 Thanks, Madhu Thorat.