Message5389

This is how to reproduce the problem:

GenJavaErr.java:

public class GenJavaErr {
    static public void genErr() throws Exception {
        Exception ex = new Exception("Exception from java");
        ex.printStackTrace();
        throw ex;
    }
}

errtest.py:

#!/usr/bin/env jython

import GenJavaErr

def err():
    GenJavaErr.genErr()

    return "Dummy return"


err()

[hmm@bombadil jythontest]$ javac GenJavaErr.java 
[hmm@bombadil jythontest]$ jython errtest.py
*sys-package-mgr*: can't create package cache dir,
'/opt/jython2.5.1/cachedir/packages'
java.lang.Exception: Exception from java
	at GenJavaErr.genErr(GenJavaErr.java:3)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at
org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:175)
	at
org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:190)
	at org.python.core.PyObject.__call__(PyObject.java:381)
	at org.python.core.PyObject.__call__(PyObject.java:385)
	at org.python.pycode._pyx0.err$1(errtest.py:8)
	at org.python.pycode._pyx0.call_function(errtest.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:165)
	at org.python.core.PyBaseCode.call(PyBaseCode.java:117)
	at org.python.core.PyFunction.__call__(PyFunction.java:307)
	at org.python.pycode._pyx0.f$0(errtest.py:11)
	at org.python.pycode._pyx0.call_function(errtest.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:165)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.Py.runCode(Py.java:1204)
	at org.python.util.PythonInterpreter.execfile(PythonInterpreter.java:200)
	at org.python.util.jython.run(jython.java:246)
	at org.python.util.jython.main(jython.java:129)
Traceback (most recent call last):
  File "errtest.py", line 11, in <module>
    err()
  File "errtest.py", line 6, in err
    GenJavaErr.genErr()
	at GenJavaErr.genErr(GenJavaErr.java:3)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)

java.lang.Exception: java.lang.Exception: Exception from java


Notice here how the Java-exception has line:
	at org.python.pycode._pyx0.err$1(errtest.py:8)
But the actual call is:
  File "errtest.py", line 6, in err

Actually in java the reported line is always the last line of the
method/function. This is a problem in our system which has long call
chains and the error handler doesn't have the python exception available
so we don't really know on what line the call was.