Hi guys, I've discovered a critical performance issue in 4.2.0 when writing to multiple ledgers. It brings throughput on 1000 concurrent ledgers down to 100 adds/sec. It doesn't seem to affect the single ledger case.
The details are at: https://issues.apache.org/jira/browse/BOOKKEEPER-569 Given the severity of the problem, I'd like to start rolling a 4.2.1 release once the fix is in. I'll also include BOOKKEEPER-554 since it's quite straightforward. -Ivan
