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https://issues.apache.org/jira/browse/SOLR-1392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748985#action_12748985
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Reuben Firmin commented on SOLR-1392:
-------------------------------------
Further debugging - this happens when the master url cannot be reached (i.e.
does not resolve to a real URL).
> NPE on replication page on slave
> --------------------------------
>
> Key: SOLR-1392
> URL: https://issues.apache.org/jira/browse/SOLR-1392
> Project: Solr
> Issue Type: Bug
> Components: web gui
> Affects Versions: 1.4
> Reporter: Reuben Firmin
> Assignee: Noble Paul
> Fix For: 1.4
>
>
> On our slave's "replication" page, I periodically see this exception.
> java.lang.NullPointerException
> at
> _jsp._admin._replication._index__jsp._jspService(_index__jsp.java:265)
> at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
> at com.caucho.jsp.Page.pageservice(Page.java:578)
> at
> com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:192)
> at
> com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
> at
> com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:241)
> at
> com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:280)
> at
> com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:108)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:264)
> at
> com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:76)
> at
> com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:158)
> at
> com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
> at
> com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:241)
> at
> com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:435)
> at com.caucho.server.port.TcpConnection.run(TcpConnection.java:586)
> at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:690)
> at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:612)
> at java.lang.Thread.run(Thread.java:619)
> Date: Fri, 28 Aug 2009 13:53:59 GMT
> Server: Apache/2.2.3 (Red Hat)
> Content-Type: text/html; charset=utf-8
> Vary: Accept-Encoding,User-Agent
> Content-Encoding: gzip
> Content-Length: 524
> Connection: close
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