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Elasticsearch for Apache Hadoop version 6.3.0

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Elasticsearch for Apache Hadoop version 6.3.0

Enhancements

Rest

Add additional error message if all shards are unavailable #1129
Add switchable findPartitions behavior. #1108

Build

Overhaul the build system to be modular. #1120

Bug Fixes

Rest

HttpStatus.GATEWAY_TIMEOUT should be 504, is 50 #1147
Scores are null when reading metadata from scroll data #1137
can’t set "http.connection.timeout" in HttpClientParams. #1124

Serialization

Setting es.read.field.include breaks mapping discovery for fields nested deeper than two levels #1139
Array include depths not being respected on singleton value fields. #1134
NullPointerException when setting “es.read.field.as.array.include” option #928
SparkSql scala.MatchError when inserting single-value object in nested type #808

Hive

getting a wrong result when run a hive-sql that contains union-all opeartor. #1084
Fixed resourceRead field from settings to read dirty data when contains the union-all opeartor in hive-sql. #1085

Spark

DefaultSource wrongly parses es.resource (spark2.2) #1082
Unable to overwrite dataframe when documents have parent #1030

Documentation

Update arch.adoc: correct backtick quotes #1136
Update configuration.adoc #1126
Update spark.adoc for Windows #1121

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