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Elastic Docs ›Elasticsearch Guide [6.8] ›Release Notes

Elasticsearch version 6.8.7

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Elasticsearch version 6.8.7

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Known issues

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  • Slow loggers can cause Log4j loggers to leak over time. When a new index is created, a new Log4j logger is associated with it. However, when an index is deleted, Log4j keeps an internal reference to its loggers that results in a memory leak #57228 (issue: #56171)

    This issue is fixed in Elasticsearch 6.8.10 and 7.7.1.

Also see Breaking changes in 6.8.

Bug fixes

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Authentication
  • Preserve ApiKey credentials for async verification #51244
CCR
Engine
  • Account soft-deletes in FrozenEngine #51192 (issue: #50775)
Features/Java Low Level REST Client
  • Improve warning value extraction performance in Response #50208 (issue: #24114)
Infra/Core
  • Ignore virtual ethernet devices that disappear #51581 (issue: #49914)
Machine Learning
  • Include out-of-order as well as in-order terms in categorization reverse searches #950 (issue: #949)
SQL
  • Fix ORDER BY on aggregates and GROUPed BY fields #51894 (issue: #50355)
  • Fix ORDER BY YEAR() function #51562 (issue: #51224)
  • Fix issue with CAST and NULL checking. #50371 (issue: #50191)
Search

Enhancements

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SQL
  • Verify Full-Text Search functions not allowed in SELECT #51568 (issue: #47446)

Upgrades

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Infra/Packaging
  • Upgrade the bundled JDK to JDK 13.0.2 #51511
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