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https://issues.apache.org/jira/browse/SOLR-16891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17743971#comment-17743971
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ASF subversion and git services commented on SOLR-16891:
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Commit 952a7be422b1173683c1b70fc407b93b13cfb6f1 in solr's branch
refs/heads/main from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=952a7be422b ]
SOLR-16891: Fix blank Cloud graph screen in UI (#1783)
* MapWriter and IteratorWriter should not be special cases for JSON writing
* DocCollection, Slice and Replica now write to Json and write to Maps
identically.
> Solr Cloud Graph screen blank
> -----------------------------
>
> Key: SOLR-16891
> URL: https://issues.apache.org/jira/browse/SOLR-16891
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Admin UI
> Affects Versions: 9.3
> Reporter: Houston Putman
> Priority: Blocker
> Fix For: 9.3
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> The Solr Admin UI - Cloud - Graph screen is blank. This was not an issue in
> Solr 9.2.1, so an API must have changed to make this no longer work.
> After some investigation, the screen uses the Zookeeper API to look at
> {{{}clusterstate.json{}}}, so there must have been some back-compat logic in
> the Zookeeper API to make that work given that {{clusterstate.json}} no
> longer exists. This may no longer work.
> As an easy fix, we can just move to using the Collections ClusterStatus API
> which returns the same data that used to exist in the
> {{{}clusterstate.json{}}}, so we don't even need to map fields or anything.
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