Elasticsearch version 6.8.21

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Elasticsearch version 6.8.21

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Also see Breaking changes in 6.8.

Security updates

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Enhancements

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Infra/Logging
  • Disable JNDI lookups via the log4j2.formatMsgNoLookups system property #81622
  • Patch log4j jar to remove the JndiLookup class from the classpath #81629