It's known that:

logger.error("String {} with {} some {} arguments, object1, object2, object3, exception);

will correctly interpolate the three objects' object.toString() where the " {} " exist in the string.

However, this will produce unintuitive behavior:

logger.error("String {} with {} some {} arguments, object1, object2, exception);

Expected behavior: the string is interpolated properly, with the third argument being the result of exception.toString()
Actual behavior: the third " {} " literally prints out " {} ".

This is worse if you're trying to print multiple exceptions:

logger.error("Exception 1: {}, Exception 2: {}", exception1, exception2);

This will have the very unintuitive behavior of printing this, essentially leaving the "{}" in the string.

"Exception 1: {}, Exception 2: {}"