[Jython-users] JDK1.4 instability with Jython

[Jeff E. <je...@ad...>]

Until recently, I've been using Jython 2.1a3 and JDK1.3.1
on a 2-CPU Win2K box with great success.  I just switched to
JDK1.4rc and am having terrible problems with the JVM crashing.
I upgraded to Jython 2.1, but the same problems remain.  It's not
as bad with java -server, except that runs substantially slower.
Unfortunately, I can't seem to recreate the problem in an isolated
test case.

Last summer, someone posted that they couldn't even run pystone.py
with the JDK1.4 beta.  Curiously, when I run pystone.py with JDK1.3
and java -server, the JVM crashes.  It works with JDK1.4 with and
without -server.

Has anyone else had similar experiences?  Any suggestions?


Jeff Emanuel

pystone stats for the curious:

C:\>java -showversion org.python.util.jython pystone.py
java version "1.4.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-rc-b91)
Java HotSpot(TM) Client VM (build 1.4.0-rc-b91, mixed mode)

Pystone(1.1) time for 10000 passes = 1.655
This machine benchmarks at 6042.3 pystones/second

C:\>java -server -showversion org.python.util.jython pystone.py
java version "1.4.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-rc-b91)
Java HotSpot(TM) Server VM (build 1.4.0-rc-b91, mixed mode)

Pystone(1.1) time for 10000 passes = 2.718
This machine benchmarks at 3679.18 pystones/second

C:\>java -showversion org.python.util.jython pystone.py
java version "1.3.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_01)
Java HotSpot(TM) Client VM (build 1.3.1_01, mixed mode)

Pystone(1.1) time for 10000 passes = 1.156
This machine benchmarks at 8650.52 pystones/second