Issue #5365 ISE not NPE if fail to create session. #5370
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If SessionHandler.newHttpSession(Request) fails to create a session it returns null. Request.getSession(true) cannot throw a checked exception, nor can it return null, so we should throw ISE. Signed-off-by: Jan Bartel <janb@webtide.com>
gregw
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Sep 30, 2020
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To other devs, this is flagged for 9.4.33, do not merge into |
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Closes #5365
SessionHandler.newHttpSession(Request) is called by Request.getSession(true) when a new session needs to be created. If SessionHandler fails to create the session for whatever reason, it logs the exception and returns null. Request.getSession(true) isn't expecting a null and can cause a confusing NPE elsewhere deeper in the code. As Request.getSession(boolean) is a servlet api method, it cannot throw a checked exception, nor according to the api can it return null. So we throw ISE if SessionHandler.newHttpSession(Request) returns null. I think in jetty-10 it would be better to modify the signature of SessionHandler.newHttpSession(Request) to throw the exception rather than catching and returning null.