add blocking mechanism after 2 pending persist batches
make maxPendingPersistPeriod configurable
review comments
review comments
rename maxPendingPersistBatches to maxPendingPersists
fix batch indexing and prepare for next release
[maven-release-plugin] prepare release druid-0.6.52
[maven-release-plugin] prepare for next development iteration
review comments
Merge pull request #361 from metamx/worker-oome-fix

Worker oome fix
Merge branch 'master' into moar-endpoints