Null Pointer Exception in Oracle Lite

Question

Hi,
I am confused what might be causing this error.. pls help or suggest soemthing ..
java.lang.NullPointerException
at com.pega.pegarules.web.sql.SQLExplorer.getTableInformation(SQLExplorer.java:225)
at org.apache.jsp.sql.objdetails_jsp._jspService(objdetails_jsp.java:96)
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:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at com.pega.pegarules.web.StaticContentFilter.doFilter(StaticContentFilter.java:237)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
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)
it might be coming from this source code but i am not sure ..
public TableObject getTableInformation(String aCatalog, String aSchema, String
aObjectName) {
TableObject toInfo = null;
ArrayList alTemp = new ArrayList();
try {
DatabaseMetaData dmdInfo = mSession.getConnection().getMetaData();
ResultSet rset = dmdInfo.getColumns(aCatalog, aSchema, aObjectName, "%");
while (rset.next()) {
if (toInfo == null) {
toInfo = new TableObject();
toInfo.mCatalog = rset.getString(1);
toInfo.mSchema = rset.getString(2);
toInfo.mObjectName = rset.getString(3);
ColumnDefinition cdInfo = toInfo.new ColumnDefinition();
cdInfo.mColumnName = rset.getString(4);
cdInfo.mJavaColumnType = getJavaTypeName(rset.getInt(5));
getColumns is returning a zero length result set, which causes a NPE in our
code. (below). It appears something strange is going on with the 10 lite
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16-MAR-05 22:32:04 GMT
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drivers to cause this behavior -- can you guys shed any light?
Here's the link to the Sun docs re getColumns
http://java.sun.com/j2se/1.4.2/docs/api/java/sql/DatabaseMetaData.html#getColumn
s(java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String)

Answer 1

Could you please tell when you are getting this error ,at the time of start of webtogo or somewhere else