IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elasticsearch Guide [6.6] ›Release Notes

Elasticsearch version 6.6.1

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Elasticsearch version 6.6.1

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Also see Breaking changes in 6.6.

Enhancements

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Machine Learning
  • Add explanation so far to file structure finder exceptions #38191
SQL
  • Generate relevant error message when grouping functions are not used in GROUP BY #38017 (issue: #37952)
  • Skip the nested and object field types in case of an ODBC request #37948 (issue: #37801)
  • Describe aliases as views #37496 (issue: #37422)
Security
  • Cleanup construction of interceptors #38294

Bug fixes

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Audit
  • Fix IndexAuditTrail rolling upgrade on rollover edge - take 2 #38286 (issues: #33867, #37062)
  • Fix NPE in Logfile Audit Filter #38120 (issue: #38097)
Authentication
  • Enhance parsing of StatusCode in SAML Responses #38628
  • Fix expired token message in Exception header #37196
CCR
  • Do not set fatal exception when shard follow task is stopped. #37603
Distributed
  • Fix synchronization in LocalCheckpointTracker#contains #38755
Geo
  • Fix GeoHash PrefixTree BWC #38584 (issue: #38494)
  • Geo: Do not normalize the longitude with value -180 for Lucene shapes #37299 (issue: #37297)
ILM
  • Preserve ILM operation mode when creating new lifecycles #38134, #38230)
Machine Learning
  • Fix error race condition on stop _all datafeeds and close _all jobs #38113 (issue: #37959)
  • Update ML results mappings on process start #37706 (issue: #37607)
Monitoring
  • Allow built-in monitoring_user role to call GET _xpack API #38060 (issue: #37970)
Network
SQL
  • Prevent grouping over grouping functions #38649 (issue: #38308)
  • Relax StackOverflow circuit breaker for constants #38572 (issue: #38571)
  • Fix issue with IN not resolving to underlying keyword field #38440 (issue: #38424)
  • Change the Intervals milliseconds precision to 3 digits #38297 (issue: #37423)
  • Added SSL configuration options tests #37875 (issue: #37711)
  • Fix casting from date to numeric type to use millis #37869 (issue: #37655)
  • Fix object extraction from sources #37502 (issue: #37364)
  • Fix bug regarding alias fields with dots #37279 (issue: #37224)
  • Fix issue with complex expression as args of PERCENTILE/_RANK #37102 (issue: #37099)
Search
Security
  • Fix an improper permission issue when a new name is attached to an index. (CVE-2019-7611). See Security issues.
  • Fix potential NPE in UsersTool #37660
ZenDiscovery
  • Always return metadata version if metadata is requested #37674
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