[Swift-devel] Java hangs on new rcc hardware

[Michael Wilde]

The problematic Swift script seems to run fine with 32-bit Java 1.6.

- Mike

----- Original Message -----
> From: "Michael Wilde" <wilde at mcs.anl.gov>
> To: "Mihael Hategan" <hategan at mcs.anl.gov>
> Cc: "Swift Devel" <swift-devel at ci.uchicago.edu>
> Sent: Monday, July 9, 2012 8:19:55 AM
> Subject: [Swift-devel] Java hangs on new rcc hardware
> Java is acting strange for me on the new RCC "midway" cluster. The
> symptom is that the jvm seems to go into a tight cpu loop across
> several (3 or more) cores.
> 
> I see this first in the polling loop in the local scheduler provider,
> which calls Thread.sleep() and seems to not return. But each time I
> suspect and resume the jvm with ^Z, fg, ^Z, bg, it progresses further.
> Doing this twice enables the jvm to successfully complete the Swift
> script its running (which tests a single PBS job).
> 
> I see what appears to be similar behavior in the Swift build. The ant
> redist will hang somewhere around where Swift compiles the antlr
> output, then a similar suspect-resume sequence will cause it to
> continue.
> 
> I saw this first with the Java 1.7 that was installed on midway; then
> with the latest JDK 1.6, and also with what I think is a more
> recent/latest JDK 1.7.
> 
> Im still debugging, but any help or suggestions would be most welcome.
> 
> Thanks,
> 
> - Mike
> 
> --
> Michael Wilde
> Computation Institute, University of Chicago
> Mathematics and Computer Science Division
> Argonne National Laboratory
> 
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-- 
Michael Wilde
Computation Institute, University of Chicago
Mathematics and Computer Science Division
Argonne National Laboratory