https://bz.apache.org/bugzilla/show_bug.cgi?id=58463
Bug ID: 58463
Summary: Servlet 3.1 ServletInputStream.setReadListener should
not gate on asynchronous state
Product: Tomcat 8
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: major
Priority: P2
Component: Specification APIs
Assignee: [email protected]
Reporter: [email protected]
Created attachment 33150
--> https://bz.apache.org/bugzilla/attachment.cgi?id=33150&action=edit
Fix ServletInputStream.setReadListener implementation
The implementation of ServletInputStream.setReadListener incorrectly gates on
the current state of the request. In org.apache.coyote.Request the
setReadListener method checks that asynchronous processing has been started.
This is an incorrect interpretation of the specification. It should be possible
to attach a readListener to the stream even if the request is not operating in
asynchronous mode.
This is particularly malicious as it causes IllegalState exceptions to be
thrown by tomcat when asynchronous processing is managed separately to the
attaching of readListeners. An application that attaches a readListener to a
stream, and later switches the request to asynchronous mode, will not work in
tomcat.
I have attached a patch that removes this gate.
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