[IMPALA-1442] Thrift w/sasl does not use buffered transport

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.0
• Fix Version/s: Impala 2.0.1
• Assignee: Henry Robinson
• Reporter: Henry Robinson
• Created: 03/Nov/14 06:23
• Updated: 10/Nov/14 20:07
• Resolved: 10/Nov/14 20:07

Description

If you look at the packet stream from an Impala demon running an authenticated Thrift server, you will notice that a lot of the packets are very small (a few bytes). This is probably because Thrift servers that run with Sasl use the TSaslServerTransport directly over a TSocket, rather than wrapping an intermediate TBufferedServerTransport. We need to create a new factory class that creates a buffered server transport followed by a TSaslServerTransport.

This has a significant effect on network throughput in Kerberized clusters.