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https://issues.apache.org/jira/browse/SOLR-7688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14587245#comment-14587245
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Ishan Chattopadhyaya commented on SOLR-7688:
--------------------------------------------
I hit this issue during SOLR-7274, when I was trying out the authentication
layer as a separate filter.
Here's the patch which I put out then that fixed this issue, but I had
abandoned this approach and folded in the extra servlet into the SDF &
CoreContainer:
https://issues.apache.org/jira/secure/attachment/12733512/SOLR-7274.patch
(JettySolrRunner and JettyConfig)
Essentially, I changed the SortedMap to TreeMap. Also, I had to put in a hack
to avoid double initialization of the extra filter that was added.
> JettyConfig cannot be used with extra filters
> ---------------------------------------------
>
> Key: SOLR-7688
> URL: https://issues.apache.org/jira/browse/SOLR-7688
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 5.1
> Reporter: Gregory Chanan
> Assignee: Gregory Chanan
> Attachments: SOLR-7688.patch, SOLR-7688.patch
>
>
> Before SOLR-7166, users could create a MiniSolrCloudCluster with extra
> filters by specifying their own SortedMap and comparator (since Class<?
> extends Filter> is not comparable). JettyConfigs allow you to specify filter
> classes to add, but they don't work because JettyConfigs manages its own
> filter map using TreeMap. Thus, there is no way to specify a comparator and
> it fails at runtime with "Class cannot be cast to java.lang.comparable."
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