Checking Phoenix for May 14; then going back and changing date to May 15 gave this:
TTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

java.lang.NullPointerException
com.hyatt.userprofiling.ReservationFormHandler.set SessionId(ReservationFormHandler.java:5860)
com.hyatt.userprofiling.ReservationFormHandler.han dleCorporateCheckAreaAvail(ReservationFormHandler. java:1503)
sun.reflect.GeneratedMethodAccessor1405.invoke(Unk nown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:592)
atg.droplet.EventSender.sendEvent(EventSender.java :582)
atg.droplet.FormTag.doSendEvents(FormTag.java:791)
atg.droplet.FormTag.sendEvents(FormTag.java:640)
atg.droplet.DropletEventServlet.sendEvents(Droplet EventServlet.java:523)
atg.droplet.DropletEventServlet.service(DropletEve ntServlet.java:550)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
com.hyatt.util.ContextPathPipelineUtil.service(Con textPathPipelineUtil.java:181)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
com.hyatt.NoCacheServlet.service(NoCacheServlet.ja va:33)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
com.hyatt.reporting.ReportingCookieServlet.service (ReportingCookieServlet.java:110)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
com.hyatt.tracking.TrackingCookieServlet.service(T rackingCookieServlet.java:173)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.servlet.sessionsaver.SessionSaverServlet.servi ce(SessionSaverServlet.java:2442)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.userprofiling.AccessControlServlet.service(Acc essControlServlet.java:602)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.userprofiling.PageEventTriggerPipelineServlet. service(PageEventTriggerPipelineServlet.java:169)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.userprofiling.SessionEventTrigger.service(Sess ionEventTrigger.java:461)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.userprofiling.ProfileRequestServlet.service(Pr ofileRequestServlet.java:480)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
com.hyatt.cet.RedirectUrl.service(RedirectUrl.java :595)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.servlet.pipeline.DynamoPipelineServlet.service (DynamoPipelineServlet.java:469)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.servlet.pipeline.PathAuthenticationPipelineSer vlet.service(PathAuthenticationPipelineServlet.jav a:370)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.userprofiling.sso.PassportServlet.service(Pass portServlet.java:561)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.servlet.security.ThreadUserBinderServlet.servi ce(ThreadUserBinderServlet.java:91)
atg.servlet.pipeline.PipelineableServletImpl.passR equest(PipelineableServletImpl.java:116)
atg.servlet.pipeline.HeadPipelineServlet.passReque st(HeadPipelineServlet.java:1100)
atg.servlet.pipeline.HeadPipelineServlet.service(H eadPipelineServlet.java:782)
atg.servlet.pipeline.PipelineableServletImpl.servi ce(PipelineableServletImpl.java:231)
atg.filter.dspjsp.PageFilter.doFilter(Unknown Source)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doF ilter(ReplyHeaderFilter.java:96)

note The full stack trace of the root cause is available in the JBossWeb/2.0.0.GA_CP logs.