Hello, Users. I use JBOD for data node. Some times the disk in the data node has a problem.
The first time, I shut down all instance include data node and region server in the machine that has a disk problem. But It is not a good solution. So I improve the process. When I detect disk problem in the server. I just perform disk hot swap. But System administrator complains of some FD that still open so they cannot remove the disk. Regionserver has an FD, I use short circuit reads feature. (HBase version 1.2.9) When we first met this issue, we force unmount disk and remount. But after this process, kernel report error[1]. So we avoid this issue. purge stale FD. I think this issue is common. I want to know how hbase-users deal with this issue. Thank you very much for sharing your experience. Best regards, Minwoo Kang [1]: https://www.thegeekdiary.com/xfs_log_force-error-5-returned-xfs-error-centos-rhel-7/
