Re: Java->RPG, *SERIALIZE required?

[Barbara Morris <bmorris@xxxxxxxxxx>]

On 2020-03-06 12:34 p.m., Justin Taylor wrote:
> I have an old reference (2002) that says you must specify THREAD(*SERIALIZE) when calling an RPGLE service program from Java.  Is that still required/recommended?
>
> The RPG Ref manual explains that THREAD(*SERIALIZE) prevents multiple threads from concurrently access the same code, in essence making it singe-threaded.  This would be undesirable for my current project.

If your RPG code might be called by multiple threads, you must code the 
THREAD keyword. But you can code THREAD(*CONCURRENT) if you want your 
code to run concurrently in multiple threads.

If your code actually runs in multiple threads without the THREAD 
keyword, bizarre and unreproducible bad-things are almost guaranteed to 
happen.