HDDS-15664. ozone debug ldb display DeletedBlocksTransactionSummary info

[ChenSammi]

What changes were proposed in this pull request?

add support in ldb scan command, to display DeletedBlocksTransactionSummary info.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-15664

How was this patch tested?

Manual test

root@vc1337:/var/log/hadoop-ozone# ozone admin scm deletedBlocksTxn summary
RemoteException: SCM Server, while invoking StorageContainerLocationProtocolPB over node1. Retrying in 2000ms after 0 failover attempt(s).
DeletedBlocksTransaction summary:
  Total number of transactions: 43
  Total number of blocks: 43
  Total size of blocks: 2709
  Total replicated size of blocks: 8127


root@vc1337:/var/log/hadoop-ozone# ozone debug ldb --db=/var/lib/hadoop-ozone/scm/data/scm.db/ scan --cf=statefulServiceConfig
{ "DeletedBlockLogStateManager": {
  "memoizedHashCode" : 0,
  "memoizedSize" : -1,
  "unknownFields" : {
    "fields" : { }
  },
  "bitField0_" : 15,
  "totalTransactionCount_" : 43,
  "totalBlockCount_" : 43,
  "totalBlockSize_" : 2709,
  "totalBlockReplicatedSize_" : 8127,
  "memoizedIsInitialized" : 1
}
 }

[priyeshkaratha]

Thanks @ChenSammi for the patch. Changes LGTM

[Tejaskriya]

Thanks @ChenSammi, LGTM!

[adoroszlai]

Thanks @ChenSammi for the patch. DBScanner is very generic, but the PR adds tightly coupled parse logic. Can you please explain why this is needed, why STATEFUL_SERVICE_CONFIG is the only column family that needs special care? If the current logic cannot parse it, can it be implemented in a way that helps with any other column families not handled currently?

[adoroszlai]

Duplicate catch blocks, please merge them.