Description of problem: When the MDS is doing a significant shrink of a large cache, e.g. 96GB -> 64GB, the MDS will spin trying to trim cached objects and asking clients to recall caps. The monitors will remove the MDS because it's missing heartbeat beacons. Version-Release number of selected component (if applicable): 3.0 How reproducible: 100% Steps to Reproduce: 1. Create a file system and fill it with ~10 million files. Then have 4-5 clients load those files into memory. 2. Reduce the MDS cache using the `config set` admin socket command. Actual results: MDS will be removed from the MDSMap and a standby will take over. Expected results: The MDS slowly reduces its cache without service interruption.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:0475