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https://issues.apache.org/jira/browse/SOLR-8851?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved SOLR-8851.
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Resolution: Duplicate
I'm resolving this as a duplicate; lets have discussion on SOLR-7864 instead..
> ClassCastException in SearchHandler
> -----------------------------------
>
> Key: SOLR-8851
> URL: https://issues.apache.org/jira/browse/SOLR-8851
> Project: Solr
> Issue Type: Bug
> Affects Versions: 5.4.1
> Reporter: Pascal Chollet
>
> When there is a query timeout in non-distrub mode, {{SearchHandler}} is
> throwing a {{ClassCastException}}:
> {code}java.lang.ClassCastException: org.apache.solr.response.ResultContext
> cannot be cast to org.apache.solr.common.SolrDocumentList
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:293)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:156)
> ...{code}
> The problem can be reproduced if any component running after
> {{QueryComponent}} times out - in our case it is {{FacetComponent}} which
> throws a {{ExitingReaderException}}.
> {{SearchHandler:293}} expects a {{SolrDocumentList}} in {{rsp.response}}, but
> {{QueryComponent}} did add a {{ResultContext}} instead.
> It looks like this is not a problem, if the {{QueryComponent}} itself is
> timing out, as rsp.response is null in that case. It's only a problem if a
> component after {{QueryComponent}} is timing out.
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