Test failure on test suite sanity, subtest test_200c

This issue was created by maloo for sarah <sarah@whamcloud.com>

This issue relates to the following test suite run: https://maloo.whamcloud.com/test_sets/b43d3072-9ecb-11e1-b567-52540035b04c.

The sub-test test_200c failed with the following error:

Cannot set pool cea1 to /mnt/lustre/d200.pools/dir_tst

I got this error when doing rolling upgrade from 1.8.7 to 2.2.52. MDS is upgraded to 2.2.52-RHEL6 while OST and clients are 1.8.7
The original configuration is
MDS, OST:1.8.7-RHEL5; client 1:1.8.7-RHEL5; client 2:1.8.7-RHEL6