Elasticsearch 6.6.1 发布了，Elasticsearch 是一个分布式的 RESTful 风格的搜索和数据分析引擎。

更新如下：

• 机器学习

  Add explanation so far to file structure finder exceptions

• SQL

  Generate relevant error message when grouping functions are not used in GROUP BY (issue: )Skip the nested and object field types in case of an ODBC request (issue: )Describe aliases as views (issue: )

• 安全

  Cleanup construction of interceptors

Bug 修复

• Audit

  Fix IndexAuditTrail rolling upgrade on rollover edge - take 2 (issues: , )Fix NPE in Logfile Audit Filter (issue: )

• Authentication

  Enhance parsing of StatusCode in SAML Responses Fix expired token message in Exception header

• CCR

  Do not set fatal exception when shard follow task is stopped.

• Distributed

  Fix synchronization in LocalCheckpointTracker#contains

• Features/ILM

  Preserve ILM operation mode when creating new lifecycles , )

• Features/Monitoring

  Allow built-in monitoring_user role to call GET _xpack API (issue: )

• Geo

  Fix GeoHash PrefixTree BWC (issue: )Geo: Do not normalize the longitude with value -180 for Lucene shapes (issue: )

• Machine Learning

  Fix error race condition on stop _all datafeeds and close _all jobs (issue: )Update ML results mappings on process start (issue: )

• Network

  Reload SSL context on file change for LDAP (issues: , )

• SQL

  Prevent grouping over grouping functions (issue: )Relax StackOverflow circuit breaker for constants (issue: )Fix issue with IN not resolving to underlying keyword field (issue: )Change the Intervals milliseconds precision to 3 digits (issue: )Added SSL configuration options tests (issue: )Fix casting from date to numeric type to use millis (issue: )Fix object extraction from sources (issue: )Fix bug regarding alias fields with dots (issue: )Fix issue with complex expression as args of PERCENTILE/_RANK (issue: )

• Search

  Use executor SAME to handle search related handlers (issues: , )

• Security

  Fix an improper permission issue when a new name is attached to an index. (CVE-2019-7611). See .Fix potential NPE in UsersTool

• ZenDiscovery

  Always return metadata version if metadata is requested

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