Java Runtime class and CloneNotSupportedException

Question

I'm trying to execute an operating system command via a Java Stored Procedure but it fails with the following message:
Exception caught executing command.
java.lang.CloneNotSupportedException
at java.lang.Object.clone(Object.java)
at java.lang.Runtime.exec(Runtime.java)
at java.lang.Runtime.exec(Runtime.java)
at java.lang.Runtime.exec(Runtime.java)
at Host.Execute(Host.java:10)
Why? Here is my java source:
public class Host {
public static int Execute(String[] aCommand) throws IOException {
int rtnVal;
try {
Process pid = Runtime.getRuntime().exec(aCommand);
rtnVal = pid.waitFor();
catch (Exception e) {
e.printStackTrace();
rtnVal = -1;
return rtnVal;

Answer 1

John,
I don't have an answer for you, just some suggestions.
The problem may be related to the command you are trying to execute. Does your code not work for any command you try?
Also, your java method takes a "String[]" parameter. There is no standard mapping between a java "String[]" and a PL/SQL type. What is your (PL/SQL) call spec for this method?
According to the code you have posted, the "Execute()" method swallows all "Exception"s -- since your code catches them and merely prints out the stack trace. So is the stack trace you posted from the printed out stack trace (from your "catch" block) -- or is it an "uncaught" exception? Since "CloneNotSupportedException" is a subclass of "Exception", I guess the former is correct, right?
Also, since your code catches "Exception"s, and since "IOException" is a subclass of "Exception", there's not much point in declaring that your method "throws IOException". So what's the point of the declaration?
By the way, I couldn't find any mention in your post of the database version you are using. Posting that detail may be helpful (in getting you an answer to your question).
Good Luck,
Avi.