[LU-3379] osd_attr_get() ASSERTION( dt_object_exists(dt) ) failed

• Type: Story
• Resolution: Cannot Reproduce
• Priority: Major
• Labels: llnl
• Environment: server: lustre-2.3.63-6chaos_2.6.32_358.6z2.1.1chaos.ch5.1.ch5.1.x86_64; client: lustre-client-2.3.63-8chaos_2.6.32_358.6chaos.bgq62.bgq62.ppc64
• Assignee: Alex Zhuravlev
• Reporter: Ned Bass (Inactive)

Description

Lustre debug log and console log attached.

Note this MDS hosts two filesystems. One was formatted with Lustre 2.3.63 and is mounted rw by clients. The other was formatted with pre-2.3.58 and is mounted ro by clients to allow data migration to the newer filesystem. The older filesystem underwent a manual procedure to correct on-disk-format incompatibilities related to LU-3139. I'm not sure which filesystem the llog being cancelled here pertains to, but I'm suspicious of the older one because of its legacy format.

                                                             
PID: 21576  TASK: ffff880bc7416ae0  CPU: 13  COMMAND: "mdt03_066"                  
 #0 [ffff880be2a6b2f8] machine_kexec at ffffffff81035bab                           
 #1 [ffff880be2a6b358] crash_kexec at ffffffff810c0932                             
 #2 [ffff880be2a6b428] panic at ffffffff8150d723                                   
 #3 [ffff880be2a6b4a8] lbug_with_loc at ffffffffa06fbf4b [libcfs]                  
 #4 [ffff880be2a6b4c8] osd_attr_get at ffffffffa0e5a292 [osd_zfs]                  
 #5 [ffff880be2a6b4f8] llog_osd_write_rec at ffffffffa0859330 [obdclass]           
 #6 [ffff880be2a6b588] llog_write_rec at ffffffffa0827658 [obdclass]               
 #7 [ffff880be2a6b5e8] llog_write at ffffffffa0828e55 [obdclass]                   
 #8 [ffff880be2a6b658] llog_cancel_rec at ffffffffa082905c [obdclass]              
 #9 [ffff880be2a6b6a8] llog_cat_cancel_records at ffffffffa082e41e [obdclass]   
#10 [ffff880be2a6b708] llog_changelog_cancel_cb at ffffffffa0f1f661 [mdd]          
#11 [ffff880be2a6b768] llog_process_thread at ffffffffa0829dfb [obdclass]          
#12 [ffff880be2a6b818] llog_process_or_fork at ffffffffa082bb0d [obdclass]         
#13 [ffff880be2a6b868] llog_cat_process_cb at ffffffffa082e272 [obdclass]          
#14 [ffff880be2a6b8b8] llog_process_thread at ffffffffa0829dfb [obdclass]          
#15 [ffff880be2a6b968] llog_process_or_fork at ffffffffa082bb0d [obdclass]         
#16 [ffff880be2a6b9b8] llog_cat_process_or_fork at ffffffffa082c5b9 [obdclass]  
#17 [ffff880be2a6ba48] llog_cat_process at ffffffffa082c7c9 [obdclass]             
#18 [ffff880be2a6ba68] llog_changelog_cancel at ffffffffa0f1f3bf [mdd]             
#19 [ffff880be2a6baa8] llog_cancel at ffffffffa082fe58 [obdclass]                  
#20 [ffff880be2a6bae8] mdd_changelog_llog_cancel at ffffffffa0f2440e [mdd]         
#21 [ffff880be2a6bb28] mdd_changelog_user_purge at ffffffffa0f24880 [mdd]          
#22 [ffff880be2a6bb78] mdd_iocontrol at ffffffffa0f24d03 [mdd]                     
#23 [ffff880be2a6bbd8] mdt_ioc_child at ffffffffa0f782c9 [mdt]                     
#24 [ffff880be2a6bc58] mdt_iocontrol at ffffffffa0f7c418 [mdt]                     
#25 [ffff880be2a6bcf8] mdt_set_info at ffffffffa0f7cab6 [mdt]                      
#26 [ffff880be2a6bd48] mdt_handle_common at ffffffffa0f80078 [mdt]                 
#27 [ffff880be2a6bd98] mds_regular_handle at ffffffffa0fbc235 [mdt]                
#28 [ffff880be2a6bda8] ptlrpc_server_handle_request at ffffffffa0a1250c [ptlrpc]
#29 [ffff880be2a6bea8] ptlrpc_main at ffffffffa0a13a55 [ptlrpc]                    
#30 [ffff880be2a6bf48] kernel_thread at ffffffff8100c0ca      

LLNL-bug-id: TOSS-2074