make ledger metadata immutable

[apache]

make ledger metadata immutable

[sijie]

@ivankelly @jiazhai I marked this for 4.7.0 now. there have been discussions and concerns around the mutability of ledger metadata. let's pick this up in 4.7.0.

[sijie]

I don't think we are able to do this in any time soon. dropping the release version at this moment.

[ivankelly]

ya, not a hope for 4.7.0. This needs yahoo and saleforce merge to be 100% complete. We're close, but better to postpone til 4.8.0.

I remember when I did it last time, the change only took about a day.

[ivankelly]

@reddycharan @jvrao Are salesforce planning to make any changes to the client metadata handling?

[jvrao]

            // c) ledger close encountered metadata version exception and set ledger metadata back to open

We should never let this happen. Write Handle metadata is not final until it is written to ZK, and whatever is in ZK is the final/winner. Can someone explain to me how this can happen in the current code? bug in the metadata merger?

[ivankelly]

The metadata is immutable now. See the long list of changes for details.