Upgrade task 2806 carries out the conversion of column type from TEXT to VARCHAR. However, when using MySQL as DB one might encounter following error in the logs:

ERROR [main] [SchemaUpdate] Unsuccessful: create index commit_rev_idx on USER_COMMIT (COMMIT_REVISION)
ERROR [main] [SchemaUpdate] BLOB/TEXT column 'COMMIT_REVISION' used in key specification without a key length

After next Bamboo restart the indices will re-create correctly.

It would be cool if, we add something to 3.4.5 so:

• at the end of upgrade logs there would be a pretty obvious message (about the necessary Bamboo restart)
• in admin screen there would be proper information if Bamboo detects the non-existence of the index

see: BAM-10090, BSP-6626 for the details.