|Linux kernel||version 2.6.32-279.14.1.el6 and 2.6.32-431.el6|
|Pivotal Greenplum (GPDB)||All versions|
xfsaildis in I/O sleep (output from ps -efly | grep xfsaild, show state = 'D')
- The load on the affected segment node increases over time
- The GPDB sessions also get stuck in uninterruptible sleep (ps -efly | grep ^D )
- Database cannot be stopped, nor is it able to recover from a PANIC
This is due to a confirmed bug with the Linux kernel. Details of the bug are available from this Red Hat article
The only solution is to upgrade your kernel to version 2.6.32-431.el6 or higher. This fix is included in all versions of DCA software 18.104.22.168 and later.