Support multiple users can share the same gateway server #52
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This PR added support for multiple users can share the same gateway server in yarn per-job mode.
Added
execution_conf(not required) contains parameterproxyUsertoStatementExecuteRequestBody, for example:{ "statement":"SELECT * FROM source", "execution_conf":{ "proxyUser":"user1" } }In an insecure cluster, the yarn application will be submitted to cluster by
proxyUserif specified.In a secure cluster, login from keytab via
SecurityUtils.installand a proxy user ugi object is created withproxyUser, ifproxyUseris not specified, submitted job by login user.