[jira] [Reopened] (AMBARI-21898) Property provider in-memory maps are refreshed too slowly after config updates

["Dmytro Grinenko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-21898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmytro Grinenko reopened AMBARI-21898:
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[13:48:13]W:	 [Step 2/2] [ERROR] /opt/buildagent/work/eea7e780ed738043/ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractProviderModule.java:54:8: Unused import - org.apache.ambari.server.controller.spi.Request. [UnusedImports]
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> Property provider in-memory maps are refreshed too slowly after config updates
> ------------------------------------------------------------------------------
>
>                 Key: AMBARI-21898
>                 URL: https://issues.apache.org/jira/browse/AMBARI-21898
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Siddharth Wagle
>            Assignee: Siddharth Wagle
>            Priority: Critical
>             Fix For: 2.6.0
>
>         Attachments: AMBARI-21898.patch
>
>
> Building the hostComponentMap map for ProviderModule seems does unnecessary computation going through the ResourceProvider layer. On every configuration update, we call the reset on these maps which takes a long time to refresh. Instead, relying on org.apache.ambari.server.state.cluster.ClusterImpl#serviceComponentHosts will lead to faster computation without overhead like stale config calculations for every SCH.



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