Details
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Bug
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Resolution: Done
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Major
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None
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Lustre 2.5.3
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Linux lustre-mds-8-0.local 2.6.32-431.23.3.el6_lustre.x86_64 #1 SMP Thu Aug 28 20:20:13 PDT 2014 x86_64 x86_64 x86_64 GNU/Linux
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3
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15934
Description
We have a Lustre 2.4.2 file-system. It was upgraded from 1.8.7 without reformatting MDT/OST.
Recently, we decided to upgrade it to 2.5.3.
Prior to this upgrade, the file-system had clients running 2.4.2 and 2.5.3 at different time and running without problem. 4 clients only.
Yesterday, we upgraded the server to 2.5.3. MDS first. Client running 2.4.2 hung for 15+ ,minutes. We then rebooted client and mount still hung.
We then try to mount with 2 2.5.3 clients and both of them crashed.
At this point, only MDS was upgraded to 2.5.3 and rest of OSSs were still running 2.4.2.
I am attaching MDS logs here.
Please advice
