In the manage-partitions delete command we wait for the tables to drop before removing the entries in the catalog. If the tables take a long time to drop and we get an rpc timeout the command fails to remove the metadata entries. The timeout just means the process is still running and the wait period has passed. We should delete the metadata first and tell the user that the RPC has timed out and to check HBase to make sure the tables drop successful.
If there is another issue with the drop the user can re-adopt the tables into the PDS in order to run the delete command again or manually remove them from HBase.