Is it safe for a Java servlet to spawn threads in order to satisfy a request?

Question

Is it safe for my Java (Tomcat 8) web server to spawn threads in response to a HTTP request? I\'m seeing posts and forums where some people say it\'s absolutely fine, and ot

Answer 1

Also, besides excellent answer of kuporific I really advise you to think if your result computation could be expressed in terms of map / filter / group operations on lists or maps, because in 90% of cases it's possible to do so.

And if that's the case I would really advise you to use Java 8 Stream.parallelStream functionality as outlined in this official tutorial

Please ask separate question if you are interested if/how it's possible to express your computation in that way

Also, answering your initial question - it's perfectly fine to spawn threads to parallelise your computation anywhere (including servlets), however I would really advise to measure performance before and after optimization mainly because of reasons described in this superb article