3699210 - Unable to access SAP Cloud Connector after upgrade.

• Unable to open the SAP Cloud Connector URL after upgrade.
• Blank page displayed after entering user credentials in the SAP Cloud Connector URL.
• Port 8443 is not listening on the server despite the daemon service being started.
• Error messages observed in the scc_service or the daemon_scc(for Linux) logs:
  #ERROR#org.apache.catalina.startup.Catalina#CloudConnectorMainThread#          #The required Server component failed to start so Tomcat is unable to start.
  org.apache.catalina.LifecycleException: Failed to start component [StandardServer[-1]]
          at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:406)
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:179)
          at org.apache.catalina.startup.Catalina.start(Catalina.java:739)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:345)
          at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:476)
          at com.sap.scc.tomcat.utils.SCCBootStrap.lambda$main$0(SCCBootStrap.java:32)
          at java.lang.Thread.run(Thread.java:750)
  Caused by: java.lang.NoClassDefFoundError: com/sun/tools/attach/AttachNotSupportedException
          at com.sap.core.js.monitoring.MBeansFactory.<init>(MBeansFactory.java:50)
          at com.sap.core.js.monitoring.MonitoringLifecycleHandler.<init>(MonitoringLifecycleHandler.java:18)
          at com.sap.core.js.monitoring.MonitoringLifecycle.start(MonitoringLifecycle.java:16)
          at com.sap.cloud.runtime.kotyo.lifecycle.InternalComponentLifecycleManager.startInternalComponents(InternalComponentLifecycleManager.java:41)
          at com.sap.cloud.runtime.kotyo.lifecycle.InternalComponentLifecycleManager.lifecycleEvent(InternalComponentLifecycleManager.java:31)
          at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:109)
          at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:389)
          at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:336)
          at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:862)
          at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:164)
          ... 9 common frames omitted
  Caused by: java.lang.ClassNotFoundException: com.sun.tools.attach.AttachNotSupportedException
          at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
          ... 19 common frames omitted 
• Or error in the scc_service or the daemon_scc logs:
  

  #ERROR#org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/].[jsp]#https-jsse-nio2-8443-exec-5#          #Servlet.service() for servlet [jsp] in context with path [] threw exception [An exception occurred processing [js/log_view.js] at line [192]
  189:                                    tooltip: '<%= Tools.getTextForJS(locale, "tooltip.printStackDump") %>',
  190:                                    hideText: false,
  191:                                    press: () => {
  192:                                            UIFactory.showConfirmDialog('<%= Tools.getTextForJS(locale, (JvmUtils.get().isSapJvm()) ? "message.confirm.printStackDump" : "message.confirm.printStackDumpOnNonSapJvm") %>',
  193:                                                    confirmed => {
  194:                                                            if (confirmed)
  195:                                                            {

  Stacktrace:] with root cause
  java.lang.NullPointerException: null
          at com.sap.jvm.APIFactory.getMaxThreadAnnotations(APIFactory.java:370)
          at com.sap.jvm.monitor.vm.ThreadAnnotationKey.<clinit>(ThreadAnnotationKey.java:228)
          at java.lang.Class.forName0(Native Method)
          at java.lang.Class.forName(Class.java:264)...

**Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

SAP Cloud Connector release independent.

sap cloud connector, upgrade, version 2.16 to 2.18, port 8443 not listening, tomcat failed to start, java.lang.NoClassDefFoundError, java.lang.NullPointerException, java.lang.ClassNotFoundException, blank page, sap jvm, tools.jar, jdk, daemon service, cloud connector URL, runtime error, incomplete installation, corrupted sap jvm, systemd configuration , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Problem