I am also seeing this issue reported in this thread:
http://groups.google.com/group/liftweb/browse_thread/thread/5bd62ec23e29153a
INFO - Service request (GET) /comet_request/11229338523/bni3exhia1x3/
F145452833030NZTITH returned 500, took 3 Milliseconds
ERROR - Exception being returned to browser when processing /xml/edit/
1058: Message: java.lang.NullPointerException
org.mortbay.jetty.Request.getServerName(Request.java:1112)
org.mortbay.jetty.Request.getServerPort(Request.java:1169)
net.liftweb.http.provider.servlet.HTTPRequestServlet.serverPort(HTTPRequestServlet.scala:
92)
net.liftweb.http.Req$$anonfun$hostAndPath$1.apply(Req.scala:
968)
net.liftweb.http.Req$$anonfun$hostAndPath$1.apply(Req.scala:
968)
net.liftweb.common.Full.map(Box.scala:478)
net.liftweb.http.Req.hostAndPath(Req.scala:968)
net.liftweb.http.LiftSession$$anonfun$cometForHost
$1.apply(LiftSession.scala:615)
net.liftweb.http.LiftSession$$anonfun$cometForHost
$1.apply(LiftSession.scala:614)
scala.collection.TraversableLike$$anonfun$filter
$1.apply(TraversableLike.scala:240)
scala.collection.LinearSeqOptimized
$class.foreach(LinearSeqOptimized.scala:61)
scala.collection.immutable.List.foreach(List.scala:45)
scala.collection.TraversableLike
$class.filter(TraversableLike.scala:239)
scala.collection.immutable.List.filter(List.scala:45)
net.liftweb.http.LiftSession.cometForHost(LiftSession.scala:
614)
net.liftweb.http.LiftRules$$anonfun$6.apply(LiftRules.scala:
260)
net.liftweb.http.LiftRules$$anonfun$6.apply(LiftRules.scala:
257)
net.liftweb.http.LiftRules$
class.net$liftweb$http$LiftRules$
$_getLiftSession(LiftRules.scala:248)
net.liftweb.http.LiftRules$$anonfun$4.apply(LiftRules.scala:
205)
net.liftweb.http.LiftRules$$anonfun$4.apply(LiftRules.scala:
205)
net.liftweb.http.LiftServlet.getLiftSession(LiftServlet.scala:
69)
net.liftweb.http.LiftServlet.doService(LiftServlet.scala:258)
net.liftweb.http.LiftServlet$$anonfun$doIt
$1$1.apply(LiftServlet.scala:122)
net.liftweb.http.LiftServlet$$anonfun$doIt
$1$1.apply(LiftServlet.scala:121)
net.liftweb.util.TimeHelpers$class.calcTime(TimeHelpers.scala:
344)
net.liftweb.util.Helpers$.calcTime(Helpers.scala:34)
...
I'm using Lift 2.3, Scala 2.8.1, and Jetty 6.1.22.
thank you