https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-5432 Lustre <p>If a secondary MDT tries to use a FID with a bogus sequence then the handler will loop forever in fld_client_rpc():</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[ 9667.196083] LustreError: 28865:0:(fld_handler.c:261:fld_server_lookup()) srv-lustre-MDT0000: Cannot find sequence 0x4000002c0000401: rc = -2 [ 9667.198478] LustreError: 28865:0:(fld_handler.c:261:fld_server_lookup()) Skipped 167399 previous similar messages [ 9699.057201] LNet: 4534:0:(watchdog.c:200:lcw_dump_stack()) Service thread pid 17054 was inactive for 62.00s. The thread might be hung, or it might only be slow and will resume later. Dumping the stack trace for debugging purposes: [ 9699.061160] Pid: 17054, comm: mdt01_011 17054 mdt01_011 [&lt;ffffffffa06821fa&gt;] ptlrpc_set_wait+0x2ea/0x830 [ptlrpc] [&lt;ffffffffa06827c7&gt;] ptlrpc_queue_wait+0x87/0x220 [ptlrpc] [&lt;ffffffffa087455b&gt;] fld_client_rpc+0x15b/0x4b0 [fld] [&lt;ffffffffa0879c81&gt;] fld_server_lookup+0x151/0x340 [fld] [&lt;ffffffffa0d6f567&gt;] lod_fld_lookup+0x1e7/0x350 [lod] [&lt;ffffffffa0d81b63&gt;] lod_object_init+0x103/0x3c0 [lod] [&lt;ffffffffa0455b98&gt;] lu_object_alloc+0xd8/0x320 [obdclass] [&lt;ffffffffa045718f&gt;] lu_object_find_at+0x2bf/0x410 [obdclass] [&lt;ffffffffa04572f6&gt;] lu_object_find+0x16/0x20 [obdclass] [&lt;ffffffffa0c95f56&gt;] mdt_object_find+0x56/0x170 [mdt] [&lt;ffffffffa0ccbe71&gt;] mdt_reint_open+0x2e1/0x2180 [mdt] [&lt;ffffffffa0cb2811&gt;] mdt_reint_rec+0x41/0xe0 [mdt] [&lt;ffffffffa0c9cdb3&gt;] mdt_reint_internal+0x4d3/0x7b0 [mdt] [&lt;ffffffffa0c9d286&gt;] mdt_intent_reint+0x1f6/0x520 [mdt] [&lt;ffffffffa0c9b929&gt;] mdt_intent_policy+0x499/0xcf0 [mdt] [&lt;ffffffffa0644342&gt;] ldlm_lock_enqueue+0x302/0x880 [ptlrpc] [&lt;ffffffffa066c343&gt;] ldlm_handle_enqueue0+0x373/0x1130 [ptlrpc] [&lt;ffffffffa06eb592&gt;] tgt_enqueue+0x62/0x1d0 [ptlrpc] [&lt;ffffffffa06eacbe&gt;] tgt_request_handle+0x71e/0xb10 [ptlrpc] [&lt;ffffffffa069d847&gt;] ptlrpc_main+0xd47/0x1860 [ptlrpc] [&lt;ffffffff8109eab6&gt;] kthread+0x96/0xa0 [&lt;ffffffff8100c30a&gt;] child_rip+0xa/0x20 [&lt;ffffffffffffffff&gt;] 0xffffffffffffffff </pre> </div></div> <p>This was found through RPC corruption.</p> LU-5432

bogus FIDs cause endless loops in fld_client_rpc()

Bug Minor Resolved Fixed John Hammond John Hammond fault fld Wed, 30 Jul 2014 22:39:26 +0000 Mon, 6 Oct 2014 12:00:50 +0000 Mon, 6 Oct 2014 12:00:50 +0000 Lustre 2.7.0 Lustre 2.7.0 0 2 <p>Please see <a href="http://review.whamcloud.com/11605" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/11605</a>. Unless someone can suggest a cleaner way to return a non-retryable failure.</p> <p>Landed for 2.7</p> Development Rank 1|hzwson: Rank (Obsolete) 15132 Severity