Todd Lipcon created KUDU-1897:
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Summary: GSSAPI negotiation single-threaded and very slow under
concurrency
Key: KUDU-1897
URL: https://issues.apache.org/jira/browse/KUDU-1897
Project: Kudu
Issue Type: Bug
Components: rpc, security
Affects Versions: 1.3.0
Reporter: Todd Lipcon
Priority: Critical
I'm running an Impala workload with ~10 concurrent clients submitting queries
that take a few seconds each on a 9 node cluster. The master is pegging on core
in negotiation, and has a bunch of other negotiation threads blocked on a mutex
within SASL.
Each negotiation is taking 2-3 seconds due to waiting on this lock.
This severely restricts connection throughput, and probably needs to be
addressed for 1.3.
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