This is the sixth release of BookKeeper as an Apache Top Level Project!
The 4.5.1 release is a bugfix release which fixes a bunch of issues reported from users of 4.5.0.
Apache BookKeeper users are encouraged to upgrade to 4.5.1. The technical details of this release are summarized below.
Fix critical bug on Parallel Recovery, see https://github.com/apache/bookkeeper/issues/343
Fix critical bug on Prometheus stats provider, see https://github.com/apache/bookkeeper/pull/535
Fix critical bug ledger length for LedgerHandleAdv, see https://github.com/apache/bookkeeper/issues/683
Fix critical bug on RackAwarePolicy, see https://github.com/apache/bookkeeper/issues/551
There is no dependency upgrade since 4.5.0.