Getting NullPointerException from Play framework - scala

Question

I have been using play framework 2.2.4 version. While executing particular action getting NullPointerException, If its from my code I can fix it but it has come from play library.
could someone help on this??
# action #
public static Result getOverViewPage(final String errorMsg){
String autoBillStatusMsg = "";
//business logic is here
Logger.info("Final Auto-pay status message : "+autoBillStatusMsg);
return ok(rave_customer_index.render());
}
We are able to see the above logger statement. But after that we are getting NullPointerException
Exception StackTrace
INFO | jvm 1 | 2015/09/18 15:15:24 | [info] application - Final
Auto-pay status message :
INFO | jvm 1 | 2015/09/18 15:15:24 | [error] play - Cannot invoke
the action, eventually got an error: java.lang.NullPointerException
INFO | jvm 1 | 2015/09/18 15:15:24 | [error] application - INFO
| jvm 1 | 2015/09/18 15:15:24 | INFO | jvm 1 | 2015/09/18
15:15:24 | ! #6nfm0a093 - Internal server error, for (GET) [/] ->
INFO | jvm 1 | 2015/09/18 15:15:24 |
INFO | jvm 1 | 2015/09/18 15:15:24 |
play.api.Application$$anon$1: Execution
exception[[NullPointerException: null]]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
play.api.Application$class.handleError(Application.scala:296)
~[com.typesafe.play.play_2.11-2.3.2.jar:2.3.2]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
play.api.DefaultApplication.handleError(Application.scala:402)
[com.typesafe.play.play_2.11-2.3.2.jar:2.3.2]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$4.apply(PlayDefaultUpstreamHandler.scala:320)
[com.typesafe.play.play_2.11-2.3.2.jar:2.3.2]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$4.apply(PlayDefaultUpstreamHandler.scala:320)
[com.typesafe.play.play_2.11-2.3.2.jar:2.3.2]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
scala.Option.map(Option.scala:145)
[org.scala-lang.scala-library-2.11.1.jar:na] INFO | jvm 1 |
2015/09/18 15:15:24 |
Caused by: java.lang.NullPointerException: null
INFO | jvm 1 | 2015/09/18 15:15:24 | at
java.net.URLEncoder.encode(URLEncoder.java:205) ~[na:1.7.0_21]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
play.api.mvc.CookieBaker$$anonfun$3.apply(Http.scala:427)
~[com.typesafe.play.play_2.11-2.3.2.jar:2.3.2]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
play.api.mvc.CookieBaker$$anonfun$3.apply(Http.scala:426)
~[com.typesafe.play.play_2.11-2.3.2.jar:2.3.2]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
~[org.scala-lang.scala-library-2.11.1.jar:na]
INFO | jvm 1 | 2015/09/18 15:15:24 | at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:245)
~[org.scala-lang.scala-library-2.11.1.jar:na]
DEBUG | wrapperp | 2015/09/18 15:15:25 | send a packet PING : ping
INFO | jvm 1 | 2015/09/18 15:15:26 | WrapperManager Debug:
Received a packet PING : ping
INFO | jvm 1 | 2015/09/18 15:15:26 | WrapperManager Debug: Send a
packet PING : ping