[HDDS-5338] Handle Bootstrap when original OM has non-ratis transactions

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 1.2.0
• Target Version/s: 1.2.0
• Assignee: Hanisha Koneru
• Reporter: Hanisha Koneru
• Created: 11/Jun/21 16:49
• Updated: 23/Aug/21 16:02
• Resolved: 23/Aug/21 16:02

Description

When non-Ratis OM is converted to ratis enabled OM, there could be transactions in the RocksDB which are not part of the Ratis logs. If the Ratis logs are not purged when a new OM is bootstrapped, it will just get all the Ratis logs from the old OM. The non-ratis transactions in the RocksDB will not be transferred to the new OM as Ratis will not know that there are transactions in the DB not present in the logs. 

So when a new OM is bootstrapping, we should check the DB for non-ratis transactions and if any are present, the new OM should download the DB from existing OM before the setConf request is sent out.

Thanks bharat for identifying this scenario here .