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https://issues.apache.org/jira/browse/SOLR-1200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716255#action_12716255
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Noble Paul commented on SOLR-1200:
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If a core does not exist 'unload'ing that core is not possible . So it is an
error.
For status command. it would be better to return "no such core exists"
> NullPointerException when unloading an absent core
> --------------------------------------------------
>
> Key: SOLR-1200
> URL: https://issues.apache.org/jira/browse/SOLR-1200
> Project: Solr
> Issue Type: Bug
> Affects Versions: 1.4
> Environment: java version "1.6.0_07"
> Reporter: Peter Wolanin
> Assignee: Noble Paul
> Priority: Minor
> Fix For: 1.4
>
> Attachments: SOLR-1200.patch, SOLR-1200.patch
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When I try to unload a core that does not exist (e.g. it has already been
> unloaded), Solr throws a NullPointerException
> java.lang.NullPointerException
> at
> org.apache.solr.handler.admin.CoreAdminHandler.handleUnloadAction(CoreAdminHandler.java:319)
> at
> org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:125)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
> at
> org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:301)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:174)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> ...
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