Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-3783] MDS crash, LustreError: 34483:0:(ldlm_flock.c:208:ldlm_flock_deadlock()) ASSERTION( req != lock ) failed https://jira.whamcloud.com/browse/LU-3783 Lustre <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre> Aug 7 14:44:01 snx11003n003 kernel: [1044424.563294] LustreError: 34483:0:(ldlm_flock.c:208:ldlm_flock_deadlock()) ASSERTION( req != lock ) failed: Aug 7 14:44:01 snx11003n003 kernel: [1044424.574590] LustreError: 34483:0:(ldlm_flock.c:208:ldlm_flock_deadlock()) LBUG Aug 7 14:44:01 snx11003n003 kernel: [1044424.583062] Pid: 34483, comm: mdt_13 Aug 7 14:44:01 snx11003n003 kernel: [1044424.587358] Aug 7 14:44:01 snx11003n003 kernel: [1044424.587360] Call Trace: Aug 7 14:44:01 snx11003n003 kernel: [1044424.592376] [&lt;ffffffffa0475865&gt;] libcfs_debug_dumpstack+0x55/0x80 [libcfs] Aug 7 14:44:01 snx11003n003 kernel: [1044424.600494] [&lt;ffffffffa0475e77&gt;] lbug_with_loc+0x47/0xb0 [libcfs] Aug 7 14:44:01 snx11003n003 kernel: [1044424.607793] [&lt;ffffffffa0716694&gt;] ldlm_process_flock_lock+0x12c4/0x15f0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.616518] [&lt;ffffffffa0771e7b&gt;] ? null_alloc_rs+0x1ab/0x3b0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.624169] [&lt;ffffffffa06ebcf5&gt;] ldlm_lock_enqueue+0x405/0x8f0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.632023] [&lt;ffffffffa071278d&gt;] ldlm_handle_enqueue0+0x48d/0xf50 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.640139] [&lt;ffffffffa0c481c6&gt;] mdt_enqueue+0x46/0x130 [mdt] Aug 7 14:44:01 snx11003n003 kernel: [1044424.646981] [&lt;ffffffffa0c3da02&gt;] mdt_handle_common+0x932/0x1770 [mdt] Aug 7 14:44:01 snx11003n003 kernel: [1044424.654604] [&lt;ffffffffa0c3e915&gt;] mdt_regular_handle+0x15/0x20 [mdt] Aug 7 14:44:01 snx11003n003 kernel: [1044424.662077] [&lt;ffffffffa0741b83&gt;] ptlrpc_main+0xf13/0x19e0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.669450] [&lt;ffffffffa0740c70&gt;] ? ptlrpc_main+0x0/0x19e0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.676765] [&lt;ffffffff8100c1ca&gt;] child_rip+0xa/0x20 Aug 7 14:44:01 snx11003n003 kernel: [1044424.682681] [&lt;ffffffffa0740c70&gt;] ? ptlrpc_main+0x0/0x19e0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.690036] [&lt;ffffffffa0740c70&gt;] ? ptlrpc_main+0x0/0x19e0 [ptlrpc] Aug 7 14:44:01 snx11003n003 kernel: [1044424.697350] [&lt;ffffffff8100c1c0&gt;] ? child_rip+0x0/0x20 </pre> </div></div> <p>the export was reconnected, but flock-&gt;blocking_export contains old value.</p> LU-3783 MDS crash, LustreError: 34483:0:(ldlm_flock.c:208:ldlm_flock_deadlock()) ASSERTION( req != lock ) failed Bug Blocker Resolved Fixed Keith Mannthey Andriy Skulysh Tue, 20 Aug 2013 12:19:51 +0000 Mon, 26 Aug 2013 16:22:09 +0000 Mon, 26 Aug 2013 16:22:09 +0000 Lustre 2.5.0 Lustre 2.5.0 0 2 <p>patch: <a href="http://review.whamcloud.com/#/c/7392/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/7392/</a></p> <p>Abort processing of flock blockers list on reaching disconnected export. A deadlock (if there is any) will be found during reprocess (introduced by <a href="https://jira.whamcloud.com/browse/LU-1715" title="flock deadlock detection does not work properly" class="issue-link" data-issue-key="LU-1715"><del>LU-1715</del></a>).</p> <p>Patch landed to Master. Let me know if anything more is needed and I will reopen the ticket.</p> Related LU-1715 Development Rank 1|hzvykn: Rank (Obsolete) 9786 Severity