[NUTCH-287] Exception when searching with sort

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Won't Fix
• Affects Version/s: 0.8
• Assignee: Unassigned
• Reporter: Stefan Neufeind
• Created: 25/May/06 19:10
• Updated: 08/Jun/11 21:34
• Resolved: 02/Jun/06 22:54

Description

Running a search with &sort=url works.
But when using &sort=title I get the following exception.

2006-05-25 14:04:25 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
java.lang.RuntimeException: Unknown sort value type!
at org.apache.nutch.searcher.IndexSearcher.translateHits(IndexSearcher.java:157)
at org.apache.nutch.searcher.IndexSearcher.search(IndexSearcher.java:95)
at org.apache.nutch.searcher.NutchBean.search(NutchBean.java:239)
at org.apache.jsp.search_jsp._jspService(search_jsp.java:257)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

What is in those lines is:

WritableComparable sortValue; // convert value to writable
if (sortField == null)

{ sortValue = new FloatWritable(scoreDocs[i].score); }

else {
Object raw = ((FieldDoc)scoreDocs[i]).fields[0];
if (raw instanceof Integer)

{ sortValue = new IntWritable(((Integer)raw).intValue()); }

else if (raw instanceof Float)

{ sortValue = new FloatWritable(((Float)raw).floatValue()); }

else if (raw instanceof String)

{ sortValue = new UTF8((String)raw); }

else

{ throw new RuntimeException("Unknown sort value type!"); }

}

So I thought that maybe raw is an instance of something "strange" and tried raw.getClass().getName() or also raw.toString() to track the cause down - but that always resulted in a NullPointerException. So it seems I'm having raw being null for some strange reason.

When I try with "title2" (or something none-existing) I get a different error that title2 is unknown / not indexed. So I suspect that title should be fine here ...

If there is any information I can help out with, let me know.