Generally if an upgrade needs to alter a table it will lock thr table. Its best imho to schedule an outage.
Imagine if you corrupted table and lose a joined row. It might take 2 days outage to fix. Better to just have a 10 m 1 hour outage and get the update down with rhe fewest variables. On Thursday, January 15, 2026, Jan Fili <[email protected]> wrote: > Hello, > > You should have replicas and backups. You should be able to try with > those. If you don't have those an upgrade is not the first action item on > the list anyways. > > Best jan > > On Wed, Jan 14, 2026, 20:00 Dong Ye <[email protected]> wrote: > >> Is it safe to upgrade metastore from 2.3.0 to 3.1.0 online? >> >> Get Outlook for Mac <https://aka.ms/GetOutlookForMac> >> *From: *Dong Ye <[email protected]> >> *Date: *Tuesday, January 13, 2026 at 2:21 PM >> *To: *[email protected] <[email protected]> >> *Subject: *sync_between_metastore_2.3.0_and_3.1.0 >> >> [EXTERNAL] >> Hi, Fellow hive users: >> >> is there an online tool to convert/sync a hive megastore of old >> version 2.3.0 to an online megastore of 3.1.0? So there is no down time, >> and the airflow traffic can be redirected to a higher EMR version using the >> new version of megastore. >> >> I have found a post : https://aws.amazon.com/blogs/ >> big-data/upgrade-amazon-emr-hive-metastore-from-5-x-to-6-x/ , but it >> requires the megastore to stop for some time. >> >> Thanks. >> Have a great day! >> >> Get Outlook for Mac <https://aka.ms/GetOutlookForMac> >> > -- Sorry this was sent from mobile. Will do less grammar and spell check than usual.
