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Struts 1 ActionClass Instance Variables - Threadsafe?

Harish Verma
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Hello, what happens to instance-level non-static variables declared in a Struts 1 actionclass? For example:

In this case, will the non-static object instances s and someList also be visible to all requests that simultaneously hit someAction? Because someAction is a singleton, my guess is even s and someList should also behave exactly like class-level (static) variables, and therefore should be accessible from simultaneous threads, causing concurrency issues.

Anybody can confirm or refute this? Thanks.
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