Problem in Updating CLOB data

Question

Hi,
I am trying to update a table in oracle using a java application.
The field i am trying to update is of CLOB type.
I am calling the following function to updated the table.
I am reading a data from the a file.
But i am getting following error
Exception :java.sql.SQLException: ORA-01002: fetch out of sequence
Can anybody suggest some modification to make it work.
Thank You
public static void InsertClob(DBConnection dbcon,String gene_id){
try{
Statement stat = dbcon.con.createStatement();
String query = "select aaseq,ntseq from gene where gene_id = '"+gene_id.trim()+"' for update ";
ResultSet rs = stat.executeQuery(query);
rs.next();
Clob clob = rs.getClob(1);
Writer clobWriter = ((CLOB)clob).getCharacterOutputStream();
File seq = new File("seq.txt");
FileReader fr = new FileReader(seq);
char[] cbuffer = new char[10* 1024];
int nread = 0 ;
while((nread = fr.read(cbuffer)) != -1)
clobWriter.write(cbuffer,0,nread);
fr.close();
clobWriter.close();
rs.close();
stat.close();
}catch(Exception e){
System.out.println("Exception :"+e);
}//End of fucntion

Answer 1

same problem. Did you solve that? If you leave off the FOR UPDATE, you get "row not locked" when do thhe clobWriter.write(...