why show this error!!!!

[josephlong]

SQL> select count(*) from mytable;

COUNT(*)
----------
7690

PreparedStatement ps=conn.prepareStatement(select * from mytable)
ResultSet rs = ps.executeQuery();
try{
while(rs.next()){}
///////////////
[ERROR,Default] java.lang.ArrayStoreException
[ERROR,Default] at java.lang.System.arraycopy(Native Method)
[ERROR,Default]
[ERROR,Default] at java.util.Vector.copyInto(Vector.java:152)
[ERROR,Default]
[ERROR,Default] at com.eba.servlet.myServlet.myquery(myservlet.java:235)
[ERROR,Default]
[ERROR,Default] at com.eba.servlet.myservlet.service(myservlet.ja
va:141)
[ERROR,Default]
[ERROR,Default] at javax.servlet.http.HttpServlet.service(HttpServlet.java:85
3)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.ApplicationFilterChain.internalDo
Filter(ApplicationFilterChain.java:247)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.ApplicationFilterChain.doFilter(A
pplicationFilterChain.java:193)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardWrapperValve.invoke(Stand
ardWrapperValve.java:243)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:566)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invoke(StandardP
ipeline.java:472)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.ContainerBase.invoke(ContainerBas
e.java:943)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardContextValve.invoke(Stand
ardContextValve.java:201)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:566)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.authenticator.AuthenticatorBase.invoke
(AuthenticatorBase.java:472)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:564)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.valves.CertificatesValve.invoke(Certif
icatesValve.java:246)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:564)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invoke(StandardP
ipeline.java:472)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.ContainerBase.invoke(ContainerBas
e.java:943)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardContext.invoke(StandardCo
ntext.java:2344)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardHostValve.invoke(Standard
HostValve.java:164)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:566)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.valves.ErrorDispatcherValve.invoke(Err
orDispatcherValve.java:170)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:564)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorRe
portValve.java:170)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:564)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invoke(StandardP
ipeline.java:472)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.ContainerBase.invoke(ContainerBas
e.java:943)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardEngineValve.invoke(Standa
rdEngineValve.java:163)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invokeNext(Stand
ardPipeline.java:566)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.StandardPipeline.invoke(StandardP
ipeline.java:472)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.core.ContainerBase.invoke(ContainerBas
e.java:943)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.connector.http.HttpProcessor.process(H
ttpProcessor.java:1011)
[ERROR,Default]
[ERROR,Default] at org.apache.catalina.connector.http.HttpProcessor.run(HttpP
rocessor.java:1106)
[ERROR,Default]
[ERROR,Default] at java.lang.Thread.run(Thread.java:484)
[ERROR,Default]
[INFO,Default] curr_Page_ =null
[INFO,OracleDS] org.jboss.pool.jdbc.xa.wrapper.XADataSourceImpl created new Connectio
n (oracle.jdbc.driver.OracleConnection) with XAResource org.jboss.pool.jdbc.xa.wrappe
r.XAResourceImpl and XAConnection org.jboss.pool.jdbc.xa.wrapper.XAConnectionImpl.
[INFO,OracleDS] No transaction right now.
////////////////
why why!!!!!!!!!!!!!!
database oracle9i
jboss 2.4