[LU-1098] Object doesn't exist!

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.2.0, Lustre 2.1.2
• Affects Version/s: Lustre 2.2.0
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Christopher Morrone (Inactive)

Description

One one of our MDS nodes, we see a pretty voluminous stream of "Object doesn't exist" messages from the mdt_getattr_name_lock() function, and the associated LU_OBJECT_DEBUG output.

We looked at code briefly and suspect that this is a race between an unlink and a getattr, which would be completely normal and expected.

So why does this message exist? Is the race being handled correctly?

Issue Links

• duplicates: LU-966 post-fsck MDS LBUG during recovery due to missing FID
• is duplicated by: LU-1350 Parent doesn't exist!
• Trackbacks: Changelog 2.1 Changes from version 2.1.1 to version 2.1.2 Server support for kernels: 2.6.18308.4.1.el5 (RHEL5) 2.6.32220.17.1.el6 (RHEL6) Client support for unpatched kernels: 2.6.18308.4.1.el5 (RHEL5) 2.6.32220.17.1....
• Trackbacks: Changelog 2.2 version 2.2.0 Support for networks: o2iblnd OFED 1.5.4 Server support for kernels: 2.6.32220.4.2.el6 (RHEL6) Client support for unpatched kernels: 2.6.18274.18.1.el5 (RHEL5) 2.6.32220.4.2.el6 (RHEL6) 2.6.32.360....

Comments

[Build Master (Inactive)]

Integrated in lustre-master » x86_64,client,el6,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » x86_64,server,el6,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » x86_64,server,el6,ofa #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » x86_64,client,el6,ofa #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » i686,client,el6,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » i686,server,el6,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Christopher Morrone (Inactive)]

I think that you forgot to keep the ChangeId the same on the patch. New gerrit entry is:

http://review.whamcloud.com/2165

It is possible that the stream of messages on the console was causing MDS issues, so this should probably land on 2.1 as well.

[Build Master (Inactive)]

Integrated in lustre-master » i686,server,el5,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » i686,client,el5,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » x86_64,client,el5,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c

[Build Master (Inactive)]

Integrated in lustre-master » x86_64,client,sles11,inkernel #489
LU-1098 debug: lower debug message level (Revision cf2501b64acef9a57d3e4bb91fd3ba041b36388f)

Result = SUCCESS
Oleg Drokin : cf2501b64acef9a57d3e4bb91fd3ba041b36388f
Files :

• lustre/mdt/mdt_handler.c