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Comment: recommend remote HS2 use over embedded

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The Beeline shell works in both embedded mode as well as remote mode. In the embedded mode, it runs an embedded Hive (similar to Hive CLI) whereas remote mode is for connecting to a separate HiveServer2 process over Thrift. Starting in Hive 0.14, when Beeline is used with HiveServer2, it also prints the log messages from HiveServer2 for queries it executes to STDERR. Remote HiveServer2 mode is recommended for production use, as it is more secure and doesn't require direct HDFS/metastore access to be granted for users.

 

Warning

In remote mode HiveServer2 only accepts valid Thrift calls – even in HTTP mode, the message body contains Thrift payloads.

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