Major - P3 The linux-directio test is failing in Evergreen build variants Ubuntu 18.04 and RHEL 8.0 with the following error:
[2020/01/20 09:44:40.064] t: process 22274 running [2020/01/20 09:44:40.064] [1579473880:64180][22274:0x7fc9a1ffb700], t: __posix_file_read, 413: !pfh->direct_io || S2C(session)->buffer_alignment == 0 || (!((uintptr_t)buf & (uintptr_t)(S2C(session)->buffer_alignment - 1)) && len >= S2C(session)->buffer_alignment && len % S2C(session)->buffer_alignment == 0) [2020/01/20 09:44:40.064] [1579473880:64211][22274:0x7fc9a1ffb700], t: __wt_abort, 28: aborting WiredTiger library [2020/01/20 09:44:40.092] Aborted
The failure happens fairly frequently and is easy to reproduce on Evergreen after running a few patch builds. I was not able to reproduce the error on my dev machine over two hours of runs, however.
It looks like this error started after the changes made in WT-5255.