tristantarrant/echo3 — comment on commit 839f609bb7e7d124bf85e154392e363ca3f75d66
File: src/server-java/app/nextapp/echo/app/util/DocumentBuilderPool.java line 52
By bschmid:

Expensive synchronisation. Could be source for a lock contention:

The whole app is locked as long as a new document builder is built. Imagine i.e. a failing URL lookup in newDocumentBuilder to lead to a some significant network delay - this would block the whole server vs. the individual servlet requests in the current approach