conf-sanity test_99 formats OST 1 with the “^resize_inode” and “meta_bg” options and does not reformat at the end of the test. This can cause tests that run after test 99 to fail. For example, running test 103 after test 99 causes the test to fail; see https://testing.hpdd.intel.com/test_sets/12bfb528-b4ad-11e7-9eee-5254006e85c2.
From the test log, we can see that OST 1 cannot be formatted
CMD: trevis-22vm3 mkdir -p /mnt/lustre-ost1
CMD: trevis-22vm3 test -b /dev/lvm-Role_OSS/P1
CMD: trevis-22vm3 e2label /dev/lvm-Role_OSS/P1
Starting ost1: /dev/lvm-Role_OSS/P1 /mnt/lustre-ost1
CMD: trevis-22vm3 mkdir -p /mnt/lustre-ost1; mount -t lustre /dev/lvm-Role_OSS/P1 /mnt/lustre-ost1
trevis-22vm3: mount.lustre: mount /dev/mapper/lvm--Role_OSS-P1 at /mnt/lustre-ost1 failed: Address already in use
trevis-22vm3: The target service's index is already in use. (/dev/mapper/lvm--Role_OSS-P1)
Start of /dev/lvm-Role_OSS/P1 on ost1 failed 98
Although it seems excessive, calling reformat() at the end of the test will fix this issue.