Elasticsearch version 6.4.2

Enhancements

Search
  • Add a limit for graph phrase query expansion #34031

Bug fixes

Core
  • Fix AutoQueueAdjustingExecutorBuilder settings validation #33922
Index APIs
  • Allow to clear the fielddata cache per field #33807 (issue: #33798)
Network
  • Support PKCS#11 tokens as keystores and truststores [OPEN] #34063 (issue: #11)
  • Correctly handle PKCS#11 tokens for system keystore #33460 (issues: #11, #33459)
Security
  • Security: use default scroll keepalive #33639
Snapshot/Restore
  • Do not override named S3 client credentials #33793 (issue: #33769)
Watcher
  • Watcher: Ensure triggered watch deletion is sync #33799