NPE.java

java.lang.NullPointerException: null
        at com.sparktale.bugtale.server.app.servlet.billing.GetUserBillingServlet.internalWork(GetUserBillingServlet.java:64) [GetUserBillingServlet.class:na]
        at com.sparktale.bugtale.server.app.servlet.billing.GetUserBillingServlet.internalWork(GetUserBillingServlet.java:27) [GetUserBillingServlet.class:na]
        at com.sparktale.bugtale.server.app.servlet.AppServicesProtoServlet.work(AppServicesProtoServlet.java:82) [AppServicesProtoServlet.class:na]
        at com.sparktale.bugtale.server.app.servlet.AppServicesProtoServlet.work(AppServicesProtoServlet.java:21) [AppServicesProtoServlet.class:na]
        at com.sparktale.bugtale.server.common.servlet.CommonServlet.handleRequest(CommonServlet.java:144) [CommonServlet.class:na]
        at com.sparktale.bugtale.server.common.servlet.CommonServlet.doPost(CommonServlet.java:64) [CommonServlet.class:na]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) [servlet-api.jar:na]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) [servlet-api.jar:na]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) [catalina.jar:7.0.42]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.42]
        at org.apache.catalina.filters.ExpiresFilter.doFilter(ExpiresFilter.java:1179) [catalina.jar:7.0.42]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.42]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.42]
        at org.apache.catalina.filters.AddDefaultCharsetFilter.doFilter(AddDefaultCharsetFilter.java:88) [catalina.jar:7.0.42]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.42]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.42]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) [catalina.jar:7.0.42]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) [catalina.jar:7.0.42]
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:7.0.42]
        at com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve.invoke(RedisSessionHandlerValve.java:26) [tomcat-redis-session-manager-1.2.jar:na]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) [catalina.jar:7.0.42]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) [catalina.jar:7.0.42]
        at ch.qos.logback.access.tomcat.LogbackValve.invoke(LogbackValve.java:189) [logback-access-1.1.2.jar:na]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) [catalina.jar:7.0.42]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [catalina.jar:7.0.42]
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) [tomcat-coyote.jar:7.0.42]
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) [tomcat-coyote.jar:7.0.42]
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1686) [tomcat-coyote.jar:7.0.42]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_65]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_65]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]