On 23/09/2010 07:42, Brian wrote: > What does "response has been commited" mean? I have a theory: Maybe it means > that in the java code that the container generated for my JSP, at least one > "out.write()" method has already been used, which means that "It already has > started to send html code to the browser". Am I right? > Again, this is a sporadic issue, which drives me crazy!
"committed" means that the HTTP headers have been written to the client and no further headers can be sent (note: creating a session requires sending a cookie header to the client - this will be important in a bit). Output is buffered (I think 8k by default - might be 4k) by default so you can still add headers even after some content has been written. JSPs create sessions by default unless you explicitly disable this. I suspect the sequence is: 1. Your page starts processing 2. The page is committed (either it calls flush or the output fills the buffer so it has to flush) 3. Something goes wrong 4. Redirect to error JSP 5. Error JSP tries to create a session 6. Response has been committed so session can't be created 7. You get the error you are seeing If step 3 occurs before step 2 then everything will work as the response won't have been committed. Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
