Inactive placement groups

Understand and troubleshoot inactive placement groups (PGs).

The ceph health command returns an error message similar to the following example:
HEALTH_WARN 197 pgs stuck inactive

What this means

Ceph marks a placement group as inactive if it has not be active for the number of seconds specified in the mon_pg_stuck_threshold parameter in the Ceph configuration file. The default value of mon_pg_stuck_threshold is 300 seconds.

Usually, inactive placement groups indicate that some OSDs might be down.

For more information, see Listing placement groups stuck in stale, inactive, or unclean states and Down OSDs.

Troubleshooting this problem

  1. Use the ceph osd tree command to determine which OSDs are in a down state.
    For example,
    [ceph: root@host01 /]# ceph osd tree
  2. Troubleshoot and fix any problems with the OSDs. For more information, see Down OSDs.