[jira] [Created] (KNOX-2680) Centralized Source of Cluster Configuration Details for Discovery

["Sandor Molnar (Jira)" <ji...@apache.org>]

Sandor Molnar created KNOX-2680:
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             Summary: Centralized Source of Cluster Configuration Details for Discovery
                 Key: KNOX-2680
                 URL: https://issues.apache.org/jira/browse/KNOX-2680
             Project: Apache Knox
          Issue Type: Improvement
          Components: Server
    Affects Versions: 1.5.0, 1.6.0
            Reporter: Sandor Molnar
            Assignee: Sandor Molnar
             Fix For: 2.0.0


Currently, Knox performs cluster configuration discovery via the CM API for every descriptor (on start-up or descriptor/provider changed), even if the descriptors reference the same cluster. This discovery can be expensive and doing it multiple times only to get the same data yields sub-optimal performance.

It will be better if Knox maintained a central record of the cluster configuration details, which could be referenced for every applicable descriptor, perhaps with some expiration of the validity of that record, such that multiple interactions with the CM API for the same cluster can be avoided.

The associated cluster configuration monitoring functionality will also need to be modified to accommodate this new behavior.



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