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sendError and sendRedirect

James Turner
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Hi Guys,

I have been going through the HFS&J book and the servlet spec and am trying to figure out when the IllegalStateException will be thrown.

So far, I have found that if the response stream is committed any other attempt to write to it will result in an IllegalStateException, except if it is after a sendError or sendRedirect, in which case it will simply be ignored.

Also any attempt to add a header or content type to the response after it is committed will be ignored.

Any other attempt to write to the response stream will result in an IllegalStateException.

Am I write about this? Are there any other exceptions to the rule?

Thank you for your help. Much appreciated.

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