Web Reference: Jul 5, 2024 · To avoid the IllegalStateException in Java, it should be ensured that any method in code is not called at an illegal or inappropriate time. The earlier examples can be updated to ensure this: Jul 23, 2025 · How to solve this error? In order to avoid java.lang.IllegalStateException in Java main Thread we must ensure that any method in our code cannot be called at an illegal or an inappropriate time. Nov 24, 2013 · Usually, IllegalStateException is used to indicate that "a method has been invoked at an illegal or inappropriate time." However, this doesn't look like a particularly typical use of it. The code you've linked to shows that it can be thrown within that code at line 259 - but only after dumping a SQLException to standard output.
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