Hi Kaushal,
Thank you for your reply.
I will make sure whether this patch could fix my problem.
Thanks,
Xin
At 2016-11-25 14:57:56, "Kaushal M" <kshlmster@xxxxxxxxx> wrote: >On Fri, Nov 25, 2016 at 12:03 PM, songxin <songxin_1980@xxxxxxx> wrote: >> Hi Atin >> I found a problem, that is about client(glusterfs) will not trying to >> reconnect to server(glusterfsd) after disconnect. >> Actually, it seems caused by race condition. >> >> >> Precondition >> >> The glusterfs version is 3.7.6. >> I create a replicate volume using two node, A node and B node.One brick is >> on A node and another brick is on B node. >> A node ip:10.32.1.144 >> B node ip:10.32.0.48 >> >> >> The phenomenon is following. >> >> Firstly, the client(glusterfs) on A board disconnect with server(glusterfsd) >> on B board.The log is following. >> ... >> readv on 10.32.0.48:49309 failed (No data available) >> ... >> >> And then the client(glusterfs) on A board disconnect with server(glusterfsd) >> on A board.The log is following. >> ... >> readv on 10.32.1.144:49391 failed (Connection reset by peer) >> ... >> >> After that, all operation in mount point will show "Transport endpoint is >> not connected" until client reconnect with server(glusterfsd) on B board. >> >> >> The client log is following.And I have highlight the important line. >> ... >> [2016-10-31 04:06:03.626047] W [socket.c:588:__socket_rwv] >> 0-c_glusterfs-client-9: readv on 10.32.1.144:49391 failed (Connection reset >> by peer) >> [2016-10-31 04:06:03.627345] E [rpc-clnt.c:362:saved_frames_unwind] (--> >> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn-0xb5c80)[0x3fff8ab79f58] ( >> --> >> /usr/lib64/libgfrpc.so.0(saved_frames_unwind-0x1b7a0)[0x3fff8ab1dc90] ( >> --> >> /usr/lib64/libgfrpc.so.0(saved_frames_destroy-0x1b638)[0x3fff8ab1de10] ( >> --> >> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup-0x19af8)[0x3fff8ab1fb18] >> ( >> --> >> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify-0x18e68)[0x3fff8ab20808] ))))) >> >> 0-c_glusterfs-client-9: forced unwinding frame type(GlusterFS 3.3) >> >> op(FINODELK(30)) called at 2016-10-31 04:06:03.626033 (xid=0x7f5e) >> >> [2016-10-31 04:06:03.627395] E [MSGID: 114031] >> [client-rpc-fops.c:1673:client3_3_finodelk_cbk] 0-c_glusterfs-client-9: >> remote operation failed [Transport endpoint is not connected] >> >> [2016-10-31 04:06:03.628381] I [socket.c:3308:socket_submit_request] >> 0-c_glusterfs-client-9: not connected (priv->connected = 0) >> >> [2016-10-31 04:06:03.628432] W [rpc-clnt.c:1586:rpc_clnt_submit] >> 0-c_glusterfs-client-9: failed to submit rpc-request (XID: 0x7f5f Program: >> GlusterFS 3.3, ProgVers: 330, Proc: 30) to rpc-transport >> (c_glusterfs-client-9) >> >> [2016-10-31 04:06:03.628466] E [MSGID: 114031] >> [client-rpc-fops.c:1673:client3_3_finodelk_cbk] 0-c_glusterfs-client-9: >> remote operation failed [Transport endpoint is not connected] >> [2016-10-31 04:06:03.628475] I [MSGID: 108019] >> [afr-lk-common.c:1086:afr_lock_blocking] 0-c_glusterfs-replicate-0: unable >> to lock on even one child >> >> [2016-10-31 04:06:03.628539] I [MSGID: 108019] >> [afr-transaction.c:1224:afr_post_blocking_inodelk_cbk] >> 0-c_glusterfs-replicate-0: Blocking inodelks failed. >> >> [2016-10-31 04:06:03.628630] W [fuse-bridge.c:1282:fuse_err_cbk] >> 0-glusterfs-fuse: 20790: FLUSH() ERR => -1 (Transport endpoint is not >> connected) >> [2016-10-31 04:06:03.629149] E [rpc-clnt.c:362:saved_frames_unwind] (--> >> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn-0xb5c80)[0x3fff8ab79f58] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_unwind-0x1b7a0)[0x3fff8ab1dc90] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_destroy-0x1b638)[0x3fff8ab1de10] (--> >> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup-0x19af8)[0x3fff8ab1fb18] >> (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify-0x18e68)[0x3fff8ab20808] ))))) >> 0-c_glusterfs-client-9: forced unwinding frame type(GlusterFS 3.3) >> op(LOOKUP(27)) called at 2016-10-31 04:06:03.624346 (xid=0x7f5a) >> >> [2016-10-31 04:06:03.629183] I [rpc-clnt.c:1847:rpc_clnt_reconfig] >> 0-c_glusterfs-client-9: changing port to 49391 (from 0) >> >> [2016-10-31 04:06:03.629210] W [MSGID: 114031] >> [client-rpc-fops.c:2971:client3_3_lookup_cbk] 0-c_glusterfs-client-9: remote >> operation failed. Path: >> /loadmodules_norepl/CXC1725605_P93A001/cello/emasviews >> (b0e5a94e-a432-4dce-b86f-a551555780a2) [Transport endpoint is not connected] >> [2016-10-31 04:06:03.629266] I [socket.c:3308:socket_submit_request] >> 0-c_glusterfs-client-9: not connected (priv->connected = 255) >> [2016-10-31 04:06:03.629277] I [MSGID: 109063] >> [dht-layout.c:702:dht_layout_normalize] 0-c_glusterfs-dht: Found anomalies >> in /loadmodules_norepl/CXC1725605_P93A001/cello/emasviews (gfid = >> b0e5a94e-a432-4dce-b86f-a551555780a2). Holes=1 overlaps=0 >> [2016-10-31 04:06:03.629293] W [rpc-clnt.c:1586:rpc_clnt_submit] >> 0-c_glusterfs-client-9: failed to submit rpc-request (XID: 0x7f62 Program: >> GlusterFS 3.3, ProgVers: 330, Proc: 41) to rpc-transport >> (c_glusterfs-client-9) >> [2016-10-31 04:06:03.629333] W [fuse-resolve.c:149:fuse_resolve_gfid_cbk] >> 0-fuse: b0e5a94e-a432-4dce-b86f-a551555780a2: failed to resolve (Transport >> endpoint is not connected) >> [2016-10-31 04:06:03.629363] W [fuse-bridge.c:3385:fuse_getxattr_resume] >> 0-glusterfs-fuse: 20784: GETXATTR >> b0e5a94e-a432-4dce-b86f-a551555780a2/70366685109140 >> (system.posix_acl_access) resolution failed >> [2016-10-31 04:06:03.629729] E [rpc-clnt.c:362:saved_frames_unwind] (--> >> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn-0xb5c80)[0x3fff8ab79f58] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_unwind-0x1b7a0)[0x3fff8ab1dc90] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_destroy-0x1b638)[0x3fff8ab1de10] (--> >> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup-0x19af8)[0x3fff8ab1fb18] >> (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify-0x18e68)[0x3fff8ab20808] ))))) >> 0-c_glusterfs-client-9: forced unwinding frame type(GlusterFS 3.3) >> op(LOOKUP(27)) called at 2016-10-31 04:06:03.624568 (xid=0x7f5b) >> [2016-10-31 04:06:03.629779] W [MSGID: 114031] >> [client-rpc-fops.c:2971:client3_3_lookup_cbk] 0-c_glusterfs-client-9: remote >> operation failed. Path: /pmd/2 (fa866805-ab22-4afe-8acb-528d15ce4117) >> [Transport endpoint is not connected] >> [2016-10-31 04:06:03.629784] E [MSGID: 114031] >> [client-rpc-fops.c:2883:client3_3_opendir_cbk] 0-c_glusterfs-client-9: >> remote operation failed. Path: >> /loadmodules_norepl/CXC1725605_P93A001/cello/emasviews >> (b0e5a94e-a432-4dce-b86f-a551555780a2) [Transport endpoint is not connected] >> [2016-10-31 04:06:03.629836] I [MSGID: 109063] >> [dht-layout.c:702:dht_layout_normalize] 0-c_glusterfs-dht: Found anomalies >> in /pmd/2 (gfid = fa866805-ab22-4afe-8acb-528d15ce4117). Holes=1 overlaps=0 >> [2016-10-31 04:06:03.629857] W [fuse-bridge.c:980:fuse_fd_cbk] >> 0-glusterfs-fuse: 20794: OPENDIR() >> /loadmodules_norepl/CXC1725605_P93A001/cello/emasviews => -1 (Transport >> endpoint is not connected) >> [2016-10-31 04:06:03.629896] W [fuse-resolve.c:149:fuse_resolve_gfid_cbk] >> 0-fuse: fa866805-ab22-4afe-8acb-528d15ce4117: failed to resolve (Transport >> endpoint is not connected) >> [2016-10-31 04:06:03.629990] E [fuse-bridge.c:787:fuse_getattr_resume] >> 0-glusterfs-fuse: 20785: GETATTR 70366685017568 >> (fa866805-ab22-4afe-8acb-528d15ce4117) resolution failed >> [2016-10-31 04:06:03.630164] W [defaults.c:2212:default_releasedir] >> (-->/usr/lib64/glusterfs/3.7.6/xlator/protocol/client.so(client_local_wipe-0x42d64) >> [0x3fff86c9bc5c] -->/usr/lib64/libglusterfs.so.0(fd_unref-0x7ba98) >> [0x3fff8abb7ad0] -->/usr/lib64/libglusterfs.so.0(default_releasedir-0x9d6d8) >> [0x3fff8ab93c58] ) 0-fuse: xlator does not implement releasedir_cbk >> [2016-10-31 04:06:03.630367] E [rpc-clnt.c:362:saved_frames_unwind] (--> >> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn-0xb5c80)[0x3fff8ab79f58] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_unwind-0x1b7a0)[0x3fff8ab1dc90] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_destroy-0x1b638)[0x3fff8ab1de10] (--> >> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup-0x19af8)[0x3fff8ab1fb18] >> (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify-0x18e68)[0x3fff8ab20808] ))))) >> 0-c_glusterfs-client-9: forced unwinding frame type(GlusterFS 3.3) >> op(LOOKUP(27)) called at 2016-10-31 04:06:03.625675 (xid=0x7f5c) >> [2016-10-31 04:06:03.630368] W [MSGID: 114031] >> [client-rpc-fops.c:1569:client3_3_fstat_cbk] 0-c_glusterfs-client-9: remote >> operation failed [Transport endpoint is not connected] >> [2016-10-31 04:06:03.630497] W [MSGID: 114031] >> [client-rpc-fops.c:2971:client3_3_lookup_cbk] 0-c_glusterfs-client-9: remote >> operation failed. Path: /configuration/oamrdncy.cfg >> (200b0bb2-d903-4924-b025-262d805c0f2f) [Transport endpoint is not connected] >> [2016-10-31 04:06:03.630871] I [MSGID: 114057] >> [client-handshake.c:1437:select_server_supported_programs] >> 0-c_glusterfs-client-9: Using Program GlusterFS 3.3, Num (1298437), Version >> (330) >> >> [2016-10-31 04:06:03.631488] I [MSGID: 114046] >> [client-handshake.c:1213:client_setvolume_cbk] 0-c_glusterfs-client-9: >> Connected to c_glusterfs-client-9, attached to remote volume >> '/opt/lvmdir/c2/brick'. >> >> [2016-10-31 04:06:03.631523] I [MSGID: 114047] >> [client-handshake.c:1224:client_setvolume_cbk] 0-c_glusterfs-client-9: >> Server and Client lk-version numbers are not same, reopening the fds >> [2016-10-31 04:06:03.631555] I [MSGID: 114042] >> [client-handshake.c:1056:client_post_handshake] 0-c_glusterfs-client-9: 6 >> fds open - Delaying child_up until they are re-opened >> [2016-10-31 04:06:03.631475] W [MSGID: 114031] >> [client-rpc-fops.c:2971:client3_3_lookup_cbk] 0-c_glusterfs-client-9: remote >> operation failed. Path: /configuration/ethmac.cfg >> (00000000-0000-0000-0000-000000000000) [Transport endpoint is not connected] >> [2016-10-31 04:06:03.632256] I [MSGID: 114060] >> [client-handshake.c:820:client3_3_reopendir_cbk] 0-c_glusterfs-client-9: >> reopendir on <gfid:00000000-0000-0000-0000-000000000001> succeeded (fd = 1) >> [2016-10-31 04:06:03.632728] I [MSGID: 114060] >> [client-handshake.c:820:client3_3_reopendir_cbk] 0-c_glusterfs-client-9: >> reopendir on <gfid:257add5a-9b87-4014-8a3a-09dd0a699eec> succeeded (fd = 2) >> [2016-10-31 04:06:03.632790] I [MSGID: 114060] >> [client-handshake.c:820:client3_3_reopendir_cbk] 0-c_glusterfs-client-9: >> reopendir on <gfid:6fd47fe9-a566-47c7-8df7-e7a5e379101f> succeeded (fd = 3) >> [2016-10-31 04:06:03.632847] I [MSGID: 114060] >> [client-handshake.c:820:client3_3_reopendir_cbk] 0-c_glusterfs-client-9: >> reopendir on <gfid:fa866805-ab22-4afe-8acb-528d15ce4117> succeeded (fd = 4) >> [2016-10-31 04:06:03.632905] I [MSGID: 114060] >> [client-handshake.c:820:client3_3_reopendir_cbk] 0-c_glusterfs-client-9: >> reopendir on <gfid:139f5034-5b42-4fb8-9372-6dd7cac1e674> succeeded (fd = 5) >> [2016-10-31 04:06:03.632935] I [MSGID: 114041] >> [client-handshake.c:678:client_child_up_reopen_done] 0-c_glusterfs-client-9: >> last fd open'd/lock-self-heal'd - notifying CHILD-UP >> >> [2016-10-31 04:06:03.633028] I [MSGID: 108005] >> [afr-common.c:3841:afr_notify] 0-c_glusterfs-replicate-0: Subvolume >> 'c_glusterfs-client-9' came back up; going online. >> >> [2016-10-31 04:06:03.633386] I [MSGID: 114035] >> [client-handshake.c:193:client_set_lk_version_cbk] 0-c_glusterfs-client-9: >> Server lk version = 1 >> [2016-10-31 04:06:03.634579] W [fuse-bridge.c:758:fuse_attr_cbk] >> 0-glusterfs-fuse: 20795: FSTAT() /configuration/oamrdncy.cfg => -1 >> (Transport endpoint is not connected) >> [2016-10-31 04:06:03.634889] E [rpc-clnt.c:362:saved_frames_unwind] (--> >> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn-0xb5c80)[0x3fff8ab79f58] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_unwind-0x1b7a0)[0x3fff8ab1dc90] (--> >> /usr/lib64/libgfrpc.so.0(saved_frames_destroy-0x1b638)[0x3fff8ab1de10] (--> >> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup-0x19af8)[0x3fff8ab1fb18] >> (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify-0x18e68)[0x3fff8ab20808] ))))) >> 0-c_glusterfs-client-9: forced unwinding frame type(GlusterFS 3.3) >> op(XATTROP(33)) called at 2016-10-31 04:06:03.625716 (xid=0x7f5d) >> [2016-10-31 04:06:03.634950] W [MSGID: 114031] >> [client-rpc-fops.c:1845:client3_3_xattrop_cbk] 0-c_glusterfs-client-9: >> remote operation failed. Path: /configuration/oamrdncy.cfg >> (200b0bb2-d903-4924-b025-262d805c0f2f) >> [2016-10-31 04:06:03.635134] W [MSGID: 108008] >> [afr-read-txn.c:250:afr_read_txn] 0-c_glusterfs-replicate-0: Unreadable >> subvolume -1 found with event generation 3 for gfid >> 200b0bb2-d903-4924-b025-262d805c0f2f. (Possible split-brain) >> [2016-10-31 04:06:03.635364] I [MSGID: 114018] >> [client.c:2042:client_rpc_notify] 0-c_glusterfs-client-9: disconnected from >> c_glusterfs-client-9. Client process will keep trying to connect to glusterd >> until brick's port is available >> [2016-10-31 04:06:03.635420] E [MSGID: 108006] >> [afr-common.c:3880:afr_notify] 0-c_glusterfs-replicate-0: All subvolumes are >> down. Going offline until atleast one of them comes back up. >> [2016-10-31 04:06:03.635762] I [MSGID: 108006] >> [afr-common.c:4008:afr_local_init] 0-c_glusterfs-replicate-0: no subvolumes >> up >> [2016-10-31 04:06:03.641160] W [fuse-bridge.c:462:fuse_entry_cbk] >> 0-glusterfs-fuse: 20808: LOOKUP() /license => -1 (Transport endpoint is not >> connected) >> The message "I [MSGID: 108006] [afr-common.c:4008:afr_local_init] >> 0-c_glusterfs-replicate-0: no subvolumes up" repeated 6 times between >> [2016-10-31 04:06:03.640564] and [2016-10-31 04:06:03.641444] >> [2016-10-31 04:06:03.641484] E [MSGID: 114031] >> [client-rpc-fops.c:1621:client3_3_inodelk_cbk] 0-c_glusterfs-client-9: >> remote operation failed [Invalid argument] >> [2016-10-31 04:06:03.641562] I [MSGID: 108006] >> [afr-common.c:4008:afr_local_init] 0-c_glusterfs-replicate-0: no subvolumes >> up >> [2016-10-31 04:06:03.641573] E [MSGID: 108010] >> [afr-lk-common.c:665:afr_unlock_inodelk_cbk] 0-c_glusterfs-replicate-0: >> path=/configuration/oamrdncy.cfg gfid=200b0bb2-d903-4924-b025-262d805c0f2f: >> unlock failed on subvolume c_glusterfs-client-9 with lock owner >> 6cd0c189ff3f0000 [Invalid argument] >> [2016-10-31 04:06:03.641655] I [MSGID: 108006] >> [afr-common.c:4008:afr_local_init] 0-c_glusterfs-replicate-0: no subvolumes >> up >> [2016-10-31 04:06:03.641716] W [fuse-bridge.c:462:fuse_entry_cbk] >> 0-glusterfs-fuse: 20809: LOOKUP() /lost+found => -1 (Transport endpoint is >> not connected) >> [2016-10-31 04:06:03.642387] W [fuse-bridge.c:462:fuse_entry_cbk] >> 0-glusterfs-fuse: 20813: LOOKUP() /lost+found => -1 (Transport endpoint is >> not connected) >> ... >> >> Analysis >> >> I think the disconnection and reconnectiong between client(glusterfs on A >> board) and server(glusterfsd on A board) has a race condition as below. >> >> >> process 1 >> process 2 >> >> [2016-10-31 04:06:03.626047] readv >> err show that >> >> the disconnect happen >> >> between client and server. >> >> [2016-10-31 04:06:03.627345] It will >> call rpc_clnt_notify(). >> >> conn->connected = 0 in >> >> rpc_clnt_connection_cleanup. >> >> Creating a timer which will >> >> reconnect after 10 second. >> >> >> >> [2016-10-31 04:06:03.628381] >> calling rpc_clnt_submit(). >> >> it will call rpc_transport_connect >> >> because conn->connected is 0. >> >> [2016-10-31 04:06:03.631488] >> the new connection has been successful. >> >> >> [2016-10-31 04:06:03.633028] >> calling afr_notify(). In the case >> >> GF_EVENT_CHILD_UP the new >> >> new connection is set by "priv->child_up[idx] = 1" >> >> >> [2016-10-31 04:06:03.635364] continue >> to run client_rpc_notify() >> >> will notify RPC_CLNT_DISCONNECT >> >> in case RPC_CLNT_DISCONNECT. >> >> [2016-10-31 04:06:03.635420] In >> afr_notify() will set "priv->child_up[idx] = 0"， >> >> which is the new connection, >> >> in the case RPC_CLNT_DISCONNECT. >> >> And the all the subvolume is down. >> >> [2016-10-31 04:06:03.635762] All the >> access will be failed because >> >> no subvolumes up.And rpc_transport_connect() >> >> will not be called because the conn->connected >> >> has been set to 1 in process 2 >> >> >> Please help me to check my analysis. >> >> Thanks, >> Xin >> > >Awesome! You root caused this on your own. This exact same issue was >root caused recently and we have a pending patch for it [1]. Expect >this to be fixed soon. > >[1]: https://review.gluster.org/15916 > >> >> >> >> >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users@xxxxxxxxxxx >> http://www.gluster.org/mailman/listinfo/gluster-users
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