Todd Lipcon created RANGER-2420:
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Summary: Ranger spends 36% of CPU in ObjectMapper
Key: RANGER-2420
URL: https://issues.apache.org/jira/browse/RANGER-2420
Project: Ranger
Issue Type: Improvement
Components: Ranger
Reporter: Todd Lipcon
Ranger uses ObjectMapper to convert to/from JSON. In a profile of a workload
(an Impala authorization test) I see that 36% of the ranger CPU is spent in
these functions. 26% of total CPU is in the '_findRootDeserializer' method,
which gets cached if a type is deserialized multiple times. However, the
caching is only effective if the ObjectMapper is reused. JSONUtil appears to
create a new ObjectMapper on every call, which defeats the caching.
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