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Ending the job would cause the operating system to automatically close the connection (i.e. the equivalent of calling the close() API). Unless the job is ended abnormally... or the Java client times out, but doesn't actually close the connection (which means it'll eventually run out of descriptor handles).

But I would expect the JVM to be smart enough to know when a socket can never be used again, and automatically close it as part of it's garbage collection routine.

Regardless of whether it's the Java program's fault or not, though, you should ALWAYS code timeouts on the RPG side. Otherwise, anyone can perform a denial-of-service attack on you simply by writing code that's designed to make your program "get hung up".

Lim Hock-Chai wrote:
Could it also be cause by the java client ends the job, due to timeout,
without execute the close() api?

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