space in url dumps 'unwanted output'

[f1-outsourcing]

http://192.168.122.248:8080/webchat/start.jsp?workgroup=12341 2341234@dasdfasdf.com

Online Chat Service
Our chat service is unavailable at this time. Please check back soon.
org.jxmpp.stringprep.XmppStringprepException: XmppStringprepException caused by '12341 2341234@dasdfasdf.com': org.jxmpp.stringprep.XmppStringprepException: Localpart must not contain ' ' at org.jxmpp.jid.impl.JidCreate.from(JidCreate.java:162) at org.jivesoftware.webclient.jsp.email.leave_002da_002dmessage_jsp._jspService(leave_002da_002dmessage_jsp.java:163) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.jivesoftware.webchat.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:45) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.jivesoftware.webchat.SetupFilter.doFilter(SetupFilter.java:92) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: org.jxmpp.stringprep.XmppStringprepException: Localpart must not contain ' ' at org.jxmpp.stringprep.simple.SimpleXmppStringprep.localprep(SimpleXmppStringprep.java:74) at org.jxmpp.stringprep.XmppStringPrepUtil.localprep(XmppStringPrepUtil.java:62) at org.jxmpp.jid.parts.Localpart.from(Localpart.java:137) at org.jxmpp.jid.impl.LocalAndDomainpartJid.(LocalAndDomainpartJid.java:46) at org.jxmpp.jid.impl.JidCreate.from(JidCreate.java:105) at org.jxmpp.jid.impl.JidCreate.from(JidCreate.java:160) ... 31 more

webchat container environment:
openjdk-8, tomcat-8, webchat 4.2.0-snapshot
openfire container environment:
openjdk-8, openfire-4.3.2