HADOOP-19227. ipc.Server accelerate token negotiation only for the default mechanism. #6949
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Description of PR
HADOOP-19227
In Server.Connection.buildSaslNegotiateResponse(), it accelerates token negotiation by sending initial challenge in the negotiation response. However, it is a non-standard SASL negotiation. We should do it only for the default SASL mechanism.
How was this patch tested?
By existing tests.
For code changes:
LICENSE,LICENSE-binary,NOTICE-binaryfiles?