Elasticsearch version 6.4.2edit
Enhancementsedit
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Search
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Add a limit for graph phrase query expansion #34031
Bug fixesedit
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Core
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Fix AutoQueueAdjustingExecutorBuilder settings validation #33922
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Index APIs
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Allow to clear the fielddata cache per field #33807 (issue: #33798)
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Network
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Support PKCS#11 tokens as keystores and truststores [OPEN] #34063 (issue: #11)
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Correctly handle PKCS#11 tokens for system keystore #33460 (issues: #11, #33459)
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Security
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Security: use default scroll keepalive #33639
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Snapshot/Restore
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Do not override named S3 client credentials #33793 (issue: #33769)
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Watcher
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Watcher: Ensure triggered watch deletion is sync #33799