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Elasticsearch for Apache Hadoop version 7.17.0

Elasticsearch for Apache Hadoop version 7.17.0

Enhancements

Build

Bump: log4j 2.15.0 to 2.17.0 #1828

Serialization

Adding support for the date_nanos field type #1803

Bug Fixes

Core

Avoiding failure when using frozen indices #1842

MapReduce

Fixing docsReceived counter #1840

REST

Check for invalid characters in X-Opaque-ID headers #1873

Spark

Resolve saveToEs saves case classes fields with NULL values #1478
Correctly reading empty fields in as null rather than throwing exception #1816
Setting es.read.fields.include could throw a NullPointerException in older spark version #1822

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