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https://issues.apache.org/jira/browse/RANGER-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Velmurugan Periasamy updated RANGER-2420:
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Fix Version/s: 2.0.0
> 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
> Assignee: Abhay Kulkarni
> Priority: Major
> Fix For: 2.0.0
>
>
> 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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