Re: Java CA context cleanup issues on Linux?

[Kay-Uwe Kasemir <kasemirk@ornl.gov>]

Hello Lewis:

Thanks for the info.
Our setups are different, but not that much.

> Your example works for me with the PVs hosted on a VME IOC and the  
> following Linux workstation setup:
> * Dual Intel Xeon 2.8 GHz w/ hyper-threading enabled
> * Red Hat Enterprise Linux WS release 3 (Taroon Update 9)
> * EPICS 3.14.8.2
> * JCA 2.3.1
> * Sun's jdk1.5.0_12
>
> What is your setup?
> What happens if you change JNI_THREAD_SAFE to JNI_SINGLE_THREADED?
No errors with JNI_SINGLE_THREADED, but the example is a cooked-down
version of a bigger application that should really be JNI_THREAD_SAFE,
uses async. connection handling etc.

Same EPICS base and JCA as you.

JDK 1.5.0_9 or 1.5.0_13

Data source is soft IOC on either the same or different host.

Test host either RedHat Enterprise Linux Client release 5.1 with
kernel 2.6.18-53.el5 and g++ (GCC) 4.1.2 20070626 (Red Hat 4.1.2-14),
or the older Red Hat Enterprise Linux AS release 4 (Nahant Update 4)  
with
kernel 2.6.9-42.EL and g++ (GCC) 3.4.6 20060404 (Red Hat 3.4.6-3).

Both are single-core CPUs.
One is an Intel Xeon 2.8 GHz and /proc/cpuinfo shows the 'ht' flag,
but I guess hyperthreading is not enabled, because I see a single CPU.

-Kay