IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Elasticsearch version 6.2.2

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Elasticsearch version 6.2.2

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Enhancements

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Recovery

Synced-flush should not seal index of out of sync replicas #28464 (issue: #10032)

Bug Fixes

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Core

Handle throws on tasks submitted to thread pools #28667
Fix size blocking queue to not lie about its weight #28557 (issue: #28547)

Ingest

Guard accessDeclaredMembers for Tika on JDK 10 #28603 (issue: #28602)
Fix for bug that prevents pipelines to load that use stored scripts after a restart #28588

Java High Level REST Client

Fix parsing of script fields #28395 (issue: #28380)
Move to POST when calling API to retrieve which support request body #28342 (issue: #28326)

Machine Learning

Fixed an exception that occurred when a categorization field contained an empty string.

Monitoring

Properly registered xpack.monitoring.exporters.*.headers.* settings, which were broken in 6.2.0 and 6.2.1. For more information, see HTTP Exporter Settings.

Packaging

Fix using relative custom config path #28700 (issue: #27610)
Disable console logging in the Windows service #28618 (issue: #20422)

Percolator

Do not take duplicate query extractions into account for minimum_should_match attribute #28353 (issue: #28315)

Recovery

Fsync directory after cleanup #28604 (issue: #28435)

Security

Added CachingRealm to published artifacts so it can be used in custom realm extensions.
If the realm uses native role mappings and the security index health changes, the realm caches are cleared. For example, they are cleared when the index recovers from a red state, when the index is deleted, when the index becomes outdated, and when the index becomes up-to-date.
Fixed a bug that could prevent auditing to a remote index if the remote cluster was re-started at the same time as the audited cluster.
Removed AuthorityKeyIdentifier’s Issuer and Serial number from certificates generated by certgen and certutil. This improves compatibility with certificate verification in Kibana.

Watcher

Proxies now use HTTP by default, which was the default prior to 6.0. This fixes issues with HTTPS requests that tried to access proxies via HTTP.
Fixed the HTML sanitizer settings (xpack.notification.email.html.sanitization.*), which were broken in 6.2. For more information, see Watcher Settings.

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