[LU-632] llog_reader loops forever on an empty file

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.1.0
• Fix Version/s: Lustre 2.8.0
• Type: Bug
• Priority: Minor
• Reporter: Brian Murrell (Inactive)
• Assignee: Mikhail Pershin
• Resolution: Fixed
• Labels: patch
• Severity: 3

Description

If you give llog_reader an empty file to try to read it will loop until interrupted with the following:

Bit 0 of 135136 not set
Bit 0 of 135136 not set
Bit 0 of 135136 not set
Bit 0 of 135136 not set

It should, at most, print one iteration and exit. But perhaps an empty file should simply mean that llog_reader prints nothing.

Comments

[Build Master (Inactive)]

Integrated in hydra-agent » x86_64,el5 #81
Tune device enumeration and WAR LU-632

Brian J. Murrell :
Files :

• hydra_agent/audit.py

[Build Master (Inactive)]

Integrated in hydra-agent » x86_64,el6 #81
Tune device enumeration and WAR LU-632

Brian J. Murrell :
Files :

• hydra_agent/audit.py

[Build Master (Inactive)]

Integrated in chroma » x86_64,el6 #3
Tune device enumeration and WAR LU-632 (Revision 862bc125e26fe0dd7d5cb41a83150078d6dd93be)

Result = SUCCESS
Brian J. Murrell :
Files :

• hydra_agent/audit.py

[Li Xi (Inactive)]

I pushed patch here which not only fixes this problem but also fixes the segmentation fault problem when the llog file is corrupt.

http://review.whamcloud.com/#/c/10764/

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/10764/
Subject: LU-632 utils: fix problems of llog_reader
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: ad355e5dbb2270cee92ed58d35b4435cfd80b33c

[Frank Zago (Inactive)]

This issue appears resolved.

[Andreas Dilger]

See also http://review.whamcloud.com/17627 which fixes the case of the llog file being small but non-zero sized.