I haven't been carefully following this thread but you started with:

"On a handful of hosts, our Java-based TN5250 emulator has a chronic problem of sporadic crashing"

Are you using tn5250j or something else you have developed?  The phrase "OUR Java-based TN5250 emulator" led me there.  If it is tn5250j, have you modified the base code?  Are you running it as a jar or using the applet version?  If it is tn5250j, have you compared it to the whatever the latest version is?

I ONLY use tn5250j and it has never crashed (Windows 10, IBM i 7.2) so I wonder if it is something in the code, either vanilla or what you have modified, that might cause the issue...

Pete Helgren
www.petesworkshop.com
GIAC Secure Software Programmer-Java
Twitter - Sys_i_Geek IBM_i_Geek

On 6/14/2018 10:45 AM, James H. H. Lampert wrote:
On 6/13/18, 6:21 PM, midrange wrote:
If the pmr with ibm involved a comm trace, that should be on the system for
you to inspect.

Ok. But I'm not entirely clear on where I'd find it.

Not picking on you or your product, but you need to analyze this with
something external to your own product.

That makes sense, but analyze it with what?

Also verify that something in between is not stripping out some of the
traffic, or some attempt at a man in the middle proxy.

That's always been my primary hypothesis, but it doesn't explain why IBM's emulator is apparently immune to the problem.

--
JHHL


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