Hi Dang, I generate a core dump for this. It seems something wrong with "entry->content_lock". Is there a known issue for this? Thanks in advance. Ganesha server info     ganesha version: V2.7.6     FSAL           : In house nfs client info     nfs version    : nfs v3     client info    : Centos 7.4 ======================================================================================================================================================================= (gdb) thread 204 [Switching to thread 204 (Thread 0x7fa7932f2700 (LWP 348))] #0  0x00007faa5ba2cf4d in __lll_lock_wait () from /lib64/libpthread.so.0 (gdb) bt #0  0x00007faa5ba2cf4d in __lll_lock_wait () from /lib64/libpthread.so.0 #1  0x00007faa5ba28d02 in _L_lock_791 () from /lib64/libpthread.so.0 #2  0x00007faa5ba28c08 in pthread_mutex_lock () from /lib64/libpthread.so.0 #3  0x0000000000528657 in _mdcache_lru_unref_chunk (chunk=0x7fa7e03e31d0, func=0x59abd0 <__func__.20247> "mdcache_clean_dirent_chunks", line=579)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:2066 #4  0x000000000053894c in mdcache_clean_dirent_chunks (entry=0x7fa740035400)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:578 #5  0x0000000000538a30 in mdcache_dirent_invalidate_all (entry=0x7fa740035400)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:603 #6  0x00000000005376fc in mdc_clean_entry (entry=0x7fa740035400) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:302 #7  0x0000000000523559 in mdcache_lru_clean (entry=0x7fa740035400) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:592 #8  0x00000000005278b1 in mdcache_lru_get (sub_handle=0x7fa7383cdf40) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:1821 #9  0x0000000000536e91 in _mdcache_alloc_handle (export=0x1b4eed0, sub_handle=0x7fa7383cdf40, fs=0x0, reason=MDC_REASON_DEFAULT, func=0x59ac10 <__func__.20274> "mdcache_new_entry", line=691)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:174 #10 0x0000000000538c50 in mdcache_new_entry (export=0x1b4eed0, sub_handle=0x7fa7383cdf40, attrs_in=0x7fa7932f00a0, attrs_out=0x7fa7932f0760, new_directory=false, entry=0x7fa7932f0018,     state=0x0, reason=MDC_REASON_DEFAULT) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:690 #11 0x000000000052d156 in mdcache_alloc_and_check_handle (export=0x1b4eed0, sub_handle=0x7fa7383cdf40, new_obj=0x7fa7932f01b0, new_directory=false, attrs_in=0x7fa7932f00a0,     attrs_out=0x7fa7932f0760, tag=0x5999a4 "lookup ", parent=0x7fa878288cb0, name=0x7fa738229270 "cer_7_0.5", invalidate=0x7fa7932f009f, state=0x0)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:100 #12 0x000000000053aea1 in mdc_lookup_uncached (mdc_parent=0x7fa878288cb0, name=0x7fa738229270 "cer_7_0.5", new_entry=0x7fa7932f02c8, attrs_out=0x7fa7932f0760)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:1391 #13 0x000000000053ab27 in mdc_lookup (mdc_parent=0x7fa878288cb0, name=0x7fa738229270 "cer_7_0.5", uncached=true, new_entry=0x7fa7932f02c8, attrs_out=0x7fa7932f0760)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:1325 #14 0x000000000052d5bb in mdcache_lookup (parent=0x7fa878288ce8, name=0x7fa738229270 "cer_7_0.5", handle=0x7fa7932f0878, attrs_out=0x7fa7932f0760)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:181 #15 0x0000000000431a60 in fsal_lookup (parent=0x7fa878288ce8, name=0x7fa738229270 "cer_7_0.5", obj=0x7fa7932f0878, attrs_out=0x7fa7932f0760)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/fsal_helper.c:683 #16 0x000000000048e83e in nfs3_lookup (arg=0x7fa7381bdc88, req=0x7fa7381bd580, res=0x7fa73839dab0)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/Protocols/NFS/nfs3_lookup.c:104 #17 0x000000000045703b in nfs_rpc_process_request (reqdata=0x7fa7381bd580) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1329 #18 0x000000000045781f in nfs_rpc_process_request_slowio (reqdata=0x7fa7381bd580, slowio_check_cb=0x553b4a <nfs3_timeout_proc>)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1542 #19 0x0000000000457955 in nfs_rpc_valid_NFS (req=0x7fa7381bd580) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1586 #20 0x00007faa5c901435 in svc_vc_decode (req=0x7fa7381bd580) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_vc.c:829 #21 0x000000000044a497 in nfs_rpc_decode_request (xprt=0x7fa8840027d0, xdrs=0x7fa7384befa0)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1345 #22 0x00007faa5c901346 in svc_vc_recv (xprt=0x7fa8840027d0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_vc.c:802 #23 0x00007faa5c8fda92 in svc_rqst_xprt_task (wpe=0x7fa8840029e8) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:769 #24 0x00007faa5c8fdeea in svc_rqst_epoll_events (sr_rec=0x1b62c60, n_events=1) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:941 #25 0x00007faa5c8fe17f in svc_rqst_epoll_loop (sr_rec=0x1b62c60) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:1014 #26 0x00007faa5c8fe232 in svc_rqst_run_task (wpe=0x1b62c60) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:1050 #27 0x00007faa5c906dbb in work_pool_thread (arg=0x7fa7540008c0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/work_pool.c:181 #28 0x00007faa5ba26dc5 in start_thread () from /lib64/libpthread.so.0 #29 0x00007faa5b33321d in clone () from /lib64/libc.so.6 (gdb) frame 3 #3  0x0000000000528657 in _mdcache_lru_unref_chunk (chunk=0x7fa7e03e31d0, func=0x59abd0 <__func__.20247> "mdcache_clean_dirent_chunks", line=579)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:2066 2066in /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c (gdb) p qlane->mtx $42 = {__data = {__lock = 2, __count = 0, *__owner = 225*, __nusers = 1, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}},   __size = "\002\000\000\000\000\000\000\000\341\000\000\000\001", '\000' <repeats 26 times>, __align = 2} ======================================================================================================================================================================= (gdb) info threads   84   Thread 0x7fa9a68e8700 (LWP 228) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0   83   Thread 0x7fa9a69e9700 (LWP 227) 0x00007faa5ba29e24 in pthread_rwlock_rdlock () from /lib64/libpthread.so.0 *82   Thread 0x7fa9a6aea700 (LWP 225)* 0x00007faa5ba2cf4d in __lll_lock_wait () from /lib64/libpthread.so.0   81   Thread 0x7fa9a6beb700 (LWP 226) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0   80   Thread 0x7fa9a6cec700 (LWP 224) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0   79   Thread 0x7fa9a6ded700 (LWP 223) 0x00007faa5ba29e24 in pthread_rwlock_rdlock () from /lib64/libpthread.so.0   78   Thread 0x7fa9a6eee700 (LWP 222) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0   77   Thread 0x7fa9a6fef700 (LWP 221) 0x00007faa5ba29e24 in pthread_rwlock_rdlock () from /lib64/libpthread.so.0   76   Thread 0x7fa9a70f0700 (LWP 220) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0   75   Thread 0x7fa9a71f1700 (LWP 219) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0   74   Thread 0x7fa9a72f2700 (LWP 218) 0x00007faa5ba29e24 in pthread_rwlock_rdlock () from /lib64/libpthread.so.0   73   Thread 0x7fa9a73f3700 (LWP 217) 0x00007faa5ba2a03e in pthread_rwlock_wrlock () from /lib64/libpthread.so.0 ======================================================================================================================================================================= (gdb) *thread 82* [Switching to thread 82 (Thread 0x7fa9a6aea700 (LWP 225))] #0  0x00007faa5ba2cf4d in __lll_lock_wait () from /lib64/libpthread.so.0 (gdb) bt #0  0x00007faa5ba2cf4d in __lll_lock_wait () from /lib64/libpthread.so.0 #1  0x00007faa5ba2a307 in _L_lock_14 () from /lib64/libpthread.so.0 #2  0x00007faa5ba2a2b3 in pthread_rwlock_trywrlock () from /lib64/libpthread.so.0 #3  0x0000000000524547 in *lru_reap_chunk_impl* (qid=LRU_ENTRY_L2, parent=0x7fa7f8122810)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:809 #4  0x0000000000524a01 in mdcache_get_chunk (parent=0x7fa7f8122810, prev_chunk=0x0, whence=0)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:886 #5  0x000000000053f0b6 in mdcache_populate_dir_chunk (directory=0x7fa7f8122810, whence=0, dirent=0x7fa9a6ae7f80, prev_chunk=0x0, eod_met=0x7fa9a6ae7f7f)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:2554 #6  0x0000000000540aff in mdcache_readdir_chunked (directory=0x7fa7f8122810, whence=0, dir_state=0x7fa9a6ae8130, cb=0x43215e <populate_dirent>, attrmask=122830, eod_met=0x7fa9a6ae884b)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:2991 #7  0x000000000052ee71 in mdcache_readdir (dir_hdl=0x7fa7f8122848, whence=0x7fa9a6ae8110, dir_state=0x7fa9a6ae8130, cb=0x43215e <populate_dirent>, attrmask=122830, eod_met=0x7fa9a6ae884b)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:559 #8  0x0000000000432a85 in fsal_readdir (directory=0x7fa7f8122848, cookie=0, nbfound=0x7fa9a6ae884c, eod_met=0x7fa9a6ae884b, attrmask=122830, cb=0x491b0f <nfs3_readdirplus_callback>,     opaque=0x7fa9a6ae8800) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/fsal_helper.c:1164 #9  0x0000000000491968 in nfs3_readdirplus (arg=0x7fa91470b9f8, req=0x7fa91470b2f0, res=0x7fa91407b8f0)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/Protocols/NFS/nfs3_readdirplus.c:310 #10 0x000000000045703b in nfs_rpc_process_request (reqdata=0x7fa91470b2f0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1329 #11 0x000000000045781f in nfs_rpc_process_request_slowio (reqdata=0x7fa91470b2f0, slowio_check_cb=0x553b4a <nfs3_timeout_proc>)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1542 #12 0x0000000000457955 in nfs_rpc_valid_NFS (req=0x7fa91470b2f0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_worker_thread.c:1586 #13 0x00007faa5c901435 in svc_vc_decode (req=0x7fa91470b2f0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_vc.c:829 #14 0x000000000044a497 in nfs_rpc_decode_request (xprt=0x7fa8840027d0, xdrs=0x7fa9142a1370)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/MainNFSD/nfs_rpc_dispatcher_thread.c:1345 #15 0x00007faa5c901346 in svc_vc_recv (xprt=0x7fa8840027d0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_vc.c:802 #16 0x00007faa5c8fda92 in svc_rqst_xprt_task (wpe=0x7fa8840029e8) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:769 #17 0x00007faa5c8fdeea in svc_rqst_epoll_events (sr_rec=0x1b62c60, n_events=1) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:941 #18 0x00007faa5c8fe17f in svc_rqst_epoll_loop (sr_rec=0x1b62c60) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:1014 #19 0x00007faa5c8fe232 in svc_rqst_run_task (wpe=0x1b62c60) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/svc_rqst.c:1050 #20 0x00007faa5c906dbb in work_pool_thread (arg=0x7fa9380008c0) at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/libntirpc/src/work_pool.c:181 #21 0x00007faa5ba26dc5 in start_thread () from /lib64/libpthread.so.0 #22 0x00007faa5b33321d in clone () from /lib64/libc.so.6 (gdb) frame 3 #3  0x0000000000524547 in lru_reap_chunk_impl (qid=LRU_ENTRY_L2, parent=0x7fa7f8122810)     at /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c:809 809in /export/jcloud-zbs/src/jd.com/zfs/FSAL_SkyFS/nfs-ganesha/src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c (gdb) p entry->content_lock $43 = {__data = {__lock = 2, __nr_readers = *32681*, __readers_wakeup = 0, __writer_wakeup = 0, __nr_readers_queued = 0, __nr_writers_queued = 0, __writer = -598294472, __shared = 32680,     __pad1 = 140366914447067, __pad2 = 0, __flags = 0},   __size = "\002\000\000\000\251\177", '\000' <repeats 18 times>, "\070\300V\334\250\177\000\000\333\346\022\270\251\177", '\000' <repeats 17 times>, __align = 140363826200578} ======================================================================================================================================================================= -------------------------------- ----- 原始邮件 ----- 发件人："QR" <zhbingyin(a)sina.com&gt; 收件人："Daniel Gryniewicz" <dgryniew(a)redhat.com&gt;, "ganesha-devel" <devel(a)lists.nfs-ganesha.org&gt;, 主题：[NFS-Ganesha-Devel]回复：Re:_ganesha_hang_more_than_five_hours 日期：2020年02月26日 18点21分 Not yet. Because the docker did not enable core dump. Will try to create a full backtrace for this, thanks. -------------------------------- ----- 原始邮件 ----- 发件人：Daniel Gryniewicz <dgryniew(a)redhat.com&gt; 收件人：devel(a)lists.nfs-ganesha.org 主题：[NFS-Ganesha-Devel] Re: ganesha hang more than five hours 日期：2020年02月25日 21点20分 No, definitely not a known issue.  Do you have a full backtrace of one (or several, if they're different) hung threads? Daniel On 2/24/20 9:28 PM, QR wrote: > Hi Dang, > > Ganesha hangs more than five hours. It seems that 198 svc threads hang > on nfs3_readdirplus. > Is there a known issue about this? Thanks in advance. > > Ganesha server info >     ganesha version: V2.7.6 >     FSAL           : In house > nfs client info >     nfs version    : nfs v3 >     client info    : CentOS 7.4 > > _______________________________________________ > Devel mailing list -- devel(a)lists.nfs-ganesha.org > To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org _______________________________________________ Devel mailing list -- devel(a)lists.nfs-ganesha.org To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org _______________________________________________ Devel mailing list -- devel(a)lists.nfs-ganesha.org To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org _______________________________________________ Devel mailing list -- devel(a)lists.nfs-ganesha.org To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org