Deprecations

• Geo:
  • Deprecate validate_* and normalize_* #10248 (issue: #10170)

Enhancements

• Logging:
  • Add -XX:+PrintGCDateStamps when using GC Logs #11735 (issue: #11733)

Bug fixes

• Aggregations:
  • Fix cidr mask conversion issue for 0.0.0.0/0 and add tests #12005 #12430 (issue: #12005)
• Core:
  • ThreadPools: schedule a timeout check after adding command to queue #12319
• Internal:
  • IndicesStore shouldn't try to delete index after deleting a shard #12487
• Plugins:
  • Plugin script: Fix ES_HOME with spaces #12507 (issue: #12504)
• Query DSL:
  • Fix malformed query generation #12328 (issue: #12327)
  • QueryString ignores maxDeterminizedStates when creating a WildcardQuery #12269 (issue: #12266)
  • Fix RegexpQueryBuilder#maxDeterminizedStates #12083 (issue: #11896)
• Scripting:
  • Consistently name Groovy scripts with the same content #12296 (issue: #12212)
• Search:
  • _only_nodes preference parsed incorrectly #12460 (issue: #12389)
  • Copy headers from the MLT request before calling the multi-termvectors API #12443
• Settings:
  • Add explicit check that we have reached the end of the settings stream when parsing settings #12451 (issue: #12382)
  • Copy the classloader from the original settings when checking for prompts #12419 (issue: #12340)