Java Stream Write Exception

I am doing socket programming. I have two files called Server.java and client.java. Both programs were running successfully and successfully sending data to each other. Yesterday I added the following lines to client.java file:

 //old line
 out.writeUTF(dbdata); //dbdata was written successfully and sent to the server program
 try
 {
      //my socket connection object name is sock
        String data1="1000";
        System.out.println(data1);
        out.writeUTF(data1);   this line causes the error
 }

 catch(Exception e)
 {
        System.out.println("Exception :: "+e);
 }

When the line out.writeUTF(data1) is executed and catch catches it and shows the exception as BROKEN PIPE.

The contents of server.java which reads data1 is given below:

 String data1;
 try
 {
        data1=in.readUTF();
 }
 catch(Exception e)
 {
        System.out.println("Server Exception :: "+e);
 }

I also checked if connection is open with isConnected() before out.writeUTF(data1) and after the exception occurs in the catch I executed isConnected(). Both the times it showed True only.

The exception that pops up is ----- java.net.SocketException: Broken pipe