Issue2067

Running jython under the latest JRockit JVM I run into a NPE on startup.
Reproducible on jython-2.5.3, jython-2.5.4-rc1, and jython-2.7-b1.

% java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Oracle JRockit(R) (build R28.2.7-7-155314-1.6.0_45-20130329-0641-linux-x86_64, compiled mode)

Exception on startup:

Jython 2.5.3 (2.5:c56500f08d34+, Aug 13 2012, 14:48:36) 
[Oracle JRockit(R) (Oracle Corporation)] on java1.6.0_45
error importing site
Traceback (most recent call last):
  File "/opt/jython/Lib/site.py", line 421, in <module>
    main()
  File "/opt/jython/Lib/site.py", line 414, in main
    execsitecustomize()
  File "/opt/jython/Lib/site.py", line 395, in execsitecustomize
    import sitecustomize
  File "/opt/jython/Lib/site.py", line 395, in execsitecustomize
    import sitecustomize
java.lang.NullPointerException
        at java.io.File.<init>(File.java:222)
        at java.lang.Package$1.run(Package.java:527)
        at java.lang.Package.defineSystemPackage(Package.java:520)
        at java.lang.Package.getSystemPackages(Package.java:511)
        at java.lang.ClassLoader.getPackages(ClassLoader.java:1513)
        at java.lang.ClassLoader.getPackages(ClassLoader.java:1511)
        at java.lang.Package.getPackages(Package.java:281)
        at org.python.core.JavaImportHelper.buildLoadedPackages(JavaImportHelper.java:161)
        at org.python.core.JavaImportHelper.tryAddPackage(JavaImportHelper.java:60)
        at org.python.core.imp.import_next(imp.java:723)
        at org.python.core.imp.import_module_level(imp.java:827)
        at org.python.core.imp.importName(imp.java:917)
        at org.python.core.ImportFunction.__call__(__builtin__.java:1220)
        at org.python.core.PyObject.__call__(PyObject.java:357)
        at org.python.core.__builtin__.__import__(__builtin__.java:1174)
        at org.python.core.imp.importOne(imp.java:938)
        at site$py.execsitecustomize$27(/opt/jython/Lib/site.py:397)
        at site$py.call_function(/opt/jython/Lib/site.py)
        at org.python.core.PyTableCode.call(PyTableCode.java:165)
        at org.python.core.PyBaseCode.call(PyBaseCode.java:120)
        at org.python.core.PyFunction.__call__(PyFunction.java:307)
        at site$py.main$28(/opt/jython/Lib/site.py:419)
        at site$py.call_function(/opt/jython/Lib/site.py)
        at org.python.core.PyTableCode.call(PyTableCode.java:165)
        at org.python.core.PyBaseCode.call(PyBaseCode.java:120)
        at org.python.core.PyFunction.__call__(PyFunction.java:307)
        at site$py.f$0(/opt/jython/Lib/site.py:430)
        at site$py.call_function(/opt/jython/Lib/site.py)
        at org.python.core.PyTableCode.call(PyTableCode.java:165)
        at org.python.core.PyCode.call(PyCode.java:18)
        at org.python.core.imp.createFromCode(imp.java:391)
        at org.python.core.imp.createFromSource(imp.java:354)
        at org.python.core.imp.loadFromSource(imp.java:581)
        at org.python.core.imp.find_module(imp.java:478)
        at org.python.core.imp.import_next(imp.java:718)
        at org.python.core.imp.import_first(imp.java:740)
        at org.python.core.imp.load(imp.java:631)
        at org.python.util.jython.run(jython.java:178)
        at org.python.util.jython.main(jython.java:130)

java.lang.NullPointerException: java.lang.NullPointerException


Other notes:

* creating Lib/sitecustomize.py allows jython to startup. However, 'import logging' results in a similar traceback.

* similar traceback when running on solaris:
java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Oracle JRockit(R) (build R28.2.7-7-155314-1.6.0_45-20130329-0642-solaris-sparcv9, compiled mode)

Thanks for posting, and for the stack dump. I found this:
https://forums.oracle.com/thread/2557048
which looks like the same error. (No responses at the time of this post.)

However, the last line of Jython's code that is involved here is:
http://hg.python.org/jython/file/3d2dbae23c52/src/org/python/core/JavaImportHelper.java#l161
and it simply calls java.lang.Package.getPackages() (no arguments).

In java.lang.Package, null is passed as the file name to a File(String) constructor, and this file name comes from a list of system packages in the JVM. It's difficult to see how Jython could pollute that. I half suspect a JVM bug. Or a badly-behaving custom class loader?

I can confirm this is a jrockit bug.

The issue can be found on the Oracle support site (registration required)

To find it, search for:
java.lang.NullPointerException at java.lang.Package$1.run error during AIA FP installation using JRockit [ID 1553496.1]

The Bug is fixed in JRockit  28.2.8


Oracle has a patch for it:
Patch 16569812: REGRESSION-JDBC SDP TEST FAILURES WITH JROCKIT R28.2.7 BASED ON 6U45

Use My Oracle Support Portal to download the Patch: 16569812 for accordant OS Platform.


I downloaded and tested with the patch and the issue goes away. 

Can you close this off Jeff? thanks very much.

That's the kind of bug we like. Thanks for getting back to us.