Name: icR10030 Date: 08/02/2002



Filed By : J2SE-SQA [###@###.###
JDK : jdk1.4.1-rc-b18
Testbase : Regression testsuite
Platform[s] : Linux Redhat 7.2
Failing Test : com/sun/jdi/SDENullTest.java

Here is the some code from the com/sun/jdi/VMConnection.java:275
(as a part of the test com/sun/jdi/SDENullTest.java):
...
    /**
     * Create a Thread that will retrieve and display any output.
     * Needs to be high priority, else debugger may exit before
     * it can be displayed.
     */
    private void displayRemoteOutput(final InputStream stream) {
Thread thr = new Thread("output reader") {
public void run() {
                try {
                    dumpStream(stream);
                } catch (IOException ex) {
                    System.err.println("IOException reading output of child java interpreter:"
                                       + ex.getMessage());
                } finally {
                    notifyOutputComplete();
                }
}
};
thr.setPriority(Thread.MAX_PRIORITY-1);
thr.start();
    }
...

The test supposes that the new thread will be executed before debugger exits.
But this is not true - sometimes debugger exits before and, therefore the
java.lang.NullPointerException is thrown.

jtr file location:
==================

How to reproduce:
=================
Run the test on Linux.

Test output:
============
run args: [SDENullTarg]
SDENullTest: passed
STATUS:Passed.
java.lang.NullPointerException
at java.io.BufferedInputStream.read(BufferedInputStream.java:279)
at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:406)
at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:446)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:180)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at java.io.BufferedReader.fill(BufferedReader.java:136)
at java.io.BufferedReader.readLine(BufferedReader.java:299)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at VMConnection.dumpStream(VMConnection.java:261)
at VMConnection.access$000(VMConnection.java:12)
at VMConnection$1.run(VMConnection.java:275)
STATUS:Failed.`main' threw exception: java.lang.NullPointerException

Specific Machine Info:
======================
Hostname: linux-12
OS: Redhat Linux 7.2

======================================================================