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-2985 Lustre <p>The customer's MDT crashed and they ran e2fsck and a lot of problem couldn't be fixed. They upgraded e2fsck to latest version and fixed corruptions with it and they are now going to lfsck before mount MDT.</p> <p>However, when they ran e2fsck to generage database, we saw the following error messages and can't generate database from MDT.</p> <p>/sbin/e2fsck -n -v --mdsdb /tmp/mdsdb /dev/ExHwRaid10VolGroup/mdt</p> <p>MDS: got 4168 bytes = 521 entries in lov_objids<br/> MDS: max_files = 288784110<br/> MDS: num_osts = 521<br/> mds info db file written<br/> db-&gt;put failed<br/> : DB_KEYEXIST: Key/data pair already exists<br/> e2fsck: aborted</p> Lustre-2.1.0 CentOS5.5 LU-2985

e2fsck fails and aborted if it generates the database for lfsck

Bug Critical Resolved Won't Fix Niu Yawei Shuichi Ihara Tue, 19 Mar 2013 02:25:08 +0000 Tue, 19 Mar 2013 13:24:23 +0000 Tue, 19 Mar 2013 13:24:23 +0000 0 7 <p>Ihara, are there more logs can be used?</p> <p>Apparently there is old data in the db which has duplicated key? Does removing the old db and rerun lfsck works?</p> <p>Niu, FanYong<br/> They removed /tmp/mdsdb every time before run e2fsck for generating database.<br/> what logs files do you want to see? </p> <p>it's log file when they ran e2fsck to generate database.</p> <p>just attached e2fsck log.</p> <p>seems like there are duplicated inode number on the local mds filesystem, did you run 'e2fsck -f' to fix the local filesystem before generating mds db?</p> <p>For 2.x lfsck, it is using the FID as the key for the mdsdb. I don't think there could be duplicate inode numbers in the filesystem, but it is possible that lfsck isn't handling hard links correctly?</p> <p>If the customer has run e2fsck on the MDS filesystem, it isn't strictly necessary to run lfsck. Until this problem with lfsck is better understood, they should be able to use the filesystem without lfsck.</p> <p>Please cease all work on this. This is for an unsupported site running and unsupported version of Lustre.</p> Development Rank 1|hzvlnj: Rank (Obsolete) 7277 Severity