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    <p>If I remember correctly, you should not be calling chain.doFilter() if you do not want anything else to process the request. The filter will get executed in every case, but chain.doFilter() will ensure that all other filters are called. In order to properly block an exception from getting to the user, you need to stop the request/response handling.</p> <p>You could take a different route as well by using a framework like Spring and its Interceptors (just like a Filter). Spring gives you a lot of control over the Interceptors and how responses get handled. Granted, this is a bit heavy of a solution to your question.</p> <p>In response to the comment, according to <a href="http://java.sun.com/products/servlet/Filters.html" rel="nofollow noreferrer">http://java.sun.com/products/servlet/Filters.html</a>:</p> <blockquote> <p>The most important method in the Filter interface is the doFilter method...This method usually performs some of the following actions:</p> <p>If the current filter is the last filter in the chain that ends with the target servlet, the next entity is the resource at the end of the chain; otherwise, it is the next filter that was configured in the WAR. It invokes the next entity by calling the doFilter method on the chain object (passing in the request and response it was called with, or the wrapped versions it may have created). Alternatively, it can choose to block the request by not making the call to invoke the next entity. In the latter case, the filter is responsible for filling out the response.</p> </blockquote> <p>The idea being that this "fault barrier" needs to stop all other filters from executing, and just handle the request/response in the manner it deems necessary.</p>
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    1. POError Page Return a Status Code 200 default response
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    1. USRobert Diana
    1. USRobert Diana
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    1. COYou should not call `FilterChain#doFilter()` whenever you've called `RequestDispatcher#forward()` or `HttpServletResponse#sendRedirect()` before in the `Filter#doFilter()` method. This is not the case here.
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    2. COSince the goal is to catch the exception being thrown, but have a generic filter, we definitely need to call doFilter - this got kind of backburnered though, so for now we're looking to see if a abstract/dispatcher servlet gets us what we want.
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