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https://issues.apache.org/jira/browse/STORM-636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14303754#comment-14303754
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ASF GitHub Bot commented on STORM-636:
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Github user asfgit closed the pull request at:
https://github.com/apache/storm/pull/392
> UI/Monitor is slow for topologies with a large number of components
> -------------------------------------------------------------------
>
> Key: STORM-636
> URL: https://issues.apache.org/jira/browse/STORM-636
> Project: Apache Storm
> Issue Type: Bug
> Affects Versions: 0.10.0
> Reporter: Derek Dagit
> Assignee: Derek Dagit
> Priority: Minor
>
> The getTopologyInfo method in nimbus fetches from ZK all errors reported by
> all components. This becomes too slow for topologies with a larger numbers
> of components (bolts/spouts).
> In one example, the UI consistently took over 5 minutes to load the topology
> page for a topology with nearly 500 components while ZK was under load.
> Errors are currently stored in ZooKeeper under individual znodes per
> component. This means that each call to getTopologyInfo needs to list
> children of each znode and then download the error znodes it finds.
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