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From "Derek Hohls" <DHo...@csir.co.za>
Subject Battling with null pointer exception
Date Mon, 03 Feb 2003 11:31:49 GMT
I am looking for help tryhing to track down the cause of  
null pointer exception (my worst type of error to solve).
 
I have an XSP page, containing ESQL; it works fine on my
test machine which has a relatively small subset of data,
but gives errors on the production machine with the full
database.
 
Any general or specific ideas on how to solve this would
be welcome!
 
The error is:
 
<pre>Original exception : java.lang.NullPointerException
 at
org.apache.cocoon.components.language.markup.xsp.EsqlQuery.hasGroupingVarChanged(EsqlQuery.java:266)
 at
org.apache.cocoon.www.stell.reports.reportA_xsp.generate(/usr/local/jakarta-tomcat-4.0.4/work/Standalone/localhost/cocoon/cocoon-files/org/apache/cocoon/www/stell/reports/reportA_xsp.java:2733)
 
and the section of code is:
 
     if (_esql_query.getMaxRows() != -1 && _esql_query.getCurrentRow()
- _esql_query.getSkipRows() == _esql_query.getMaxRows()) \{
       _esql_query.setKeepGoing( false );
     \} else \{\tab //if not, advance normally
       _esql_query.setKeepGoing( _esql_query.nextRow() );  <-- this is
line 2733
     \}
 
 

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