Elasticsearch version 7.6.2
edit Also see Breaking changes in 7.6.
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Authorization
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Creation of derived API keys (keys created by existing keys) now requires explicit "no privileges" configuration #53647, CVE-2020-7009
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Allocation
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Improve performance of shards limits decider #53577 (issue: #53559)
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Authentication
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Fix potential bug in concurrent token refresh support #53668
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CCR
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Handle no such remote cluster exception in ccr #53415 (issue: #53225)
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Distributed
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Engine
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Features/ILM+SLM
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Fix null config in SnapshotLifecyclePolicy.toRequest #53328 (issues: #44465, #53171)
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ILM Freeze step retry when not acknowledged #53287
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Features/Ingest
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Fix ingest pipeline _simulate api with empty docs never returns a res… #52937 (issue: #52833)
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Features/Java High Level REST Client
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Add unsupported parameters to HLRC search request #53745
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Fix AbstractBulkByScrollRequest slices parameter via Rest #53068 (issue: #53044)
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Features/Watcher
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Disable Watcher script optimization for stored scripts #53497 (issue: #40212)
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Infra/Core
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Avoid self-suppression on grouped action listener #53262 (issue: #53174)
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Infra/Packaging
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Handle special characters and spaces in JAVA_HOME path in elasticsearch-service.bat #52676
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Infra/Plugins
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Machine Learning
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Fix a bug in the calculation of the minimum loss leaf values for classification #1032
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Network
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Invoke response handler on failure to send #53631
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SQL
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Fix NPE for parameterized LIKE/RLIKE #53573 (issue: #53557)
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Add support for index aliases for SYS COLUMNS command #53525 (issue: #31609)
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Fix issue with LIKE/RLIKE as painless script #53495 (issue: #53486)
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Fix column size for IP data type #53056 (issue: #52762)
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Search
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Fix Term Vectors with artificial docs and keyword fields #53504 (issue: #53494)
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Fix concurrent requests race over scroll context limit #53449
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Fix pre-sorting of shards in the can_match phase #53397
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Fix potential NPE in FuzzyTermsEnum #53231 (issue: #52894)