2097404 - Infrastructure Preparation: Introscope Enterprise Manager offline due to java.lang.reflect.InvocationTargetException - SAP Solution Manager 7.2

In step Configure CA Introscope of the Infrastructure Preparation (SOLMAN_SETUP) the Enterprise Manager status is red and the details shows the following error:

The following picture describes the issue:

Another symptom of the error shown in this document is the failure of activity 'Introscope Host Adapter' in the Managed System Configuration. The activity Introscope Host Adapter shows the error 'Cannot get list of all agents'. The following picture describes the issue in activity Introscope Host Adapter:

In similar cases it is also possible to see the EM in the Infrastruture Preparation as a symptom and find the following in the defaultTrace of the Solution Manager:

com.sap.smd.introscope.em.jdbc.EmJdbcGateway#sap.com/tc~wd~dispwda#com.sap.smd.introscope.em.jdbc.EmJdbcGateway.test#SAPSUPPORT#237##E608624D7F9F11E4A59A000000430B16#e608624d7f9f11e4a59a000000430b16-0#e608624d7f9f11e4a59a000000430b16#SAPEngine_Application_Thread[impl:3]_22##0#0#Error##Java###Error accessing to Enterprise Manager: [label=<host>@<port>version=(0) last error: com.sap.smd.introscope.em.IntroscopeException: Time out occurred when calling method 'run' on object [com.sap.smd.server.util.concurrent.FutureResult$1@5d32590a] after 30000 ms.
possible cause: com.sap.smd.server.util.concurrent.TimeoutException initial=false online=false]
[EXCEPTION]
 {0}#1#com.sap.smd.introscope.em.IntroscopeException: Time out occurred when calling method 'run' on object [com.sap.smd.server.util.concurrent.FutureResult$1@5d32590a] after 30000 ms.
possible cause: com.sap.smd.server.util.concurrent.TimeoutException
    at com.sap.smd.introscope.em.jdbc.EmJdbcGateway.newConnection(EmJdbcGateway.java:119)
    at com.sap.smd.introscope.em.ConnectionPool.getConnection(ConnectionPool.java:88)
    at com.sap.smd.introscope.em.AbstractEmGateway.getConnection(AbstractEmGateway.java:78)
    at com.sap.smd.introscope.em.jdbc.EmJdbcGateway.test(EmJdbcGateway.java:161)
    at com.sap.sup.admin.wily.jdbc.EMInfo.test(EMInfo.java:399)
    at com.sap.sup.admin.wily.jdbc.EMOverview.populateEmInfo(EMOverview.java:423)
    at com.sap.sup.admin.wily.jdbc.EMOverview.updateEmConfig(EMOverview.java:384)
    at com.sap.sup.admin.wily.jdbc.EMOverview.checkAgentCache(EMOverview.java:563)
    at com.sap.sup.admin.wily.jdbc.EMOverview.getAllEMgrs(EMOverview.java:118)
    at com.sap.sup.admin.wily.jdbc.EMOverview.getAllEMgrs(EMOverview.java:105)

...and:

com.sap.smd.server#sap.com/tc~wd~dispwda#com.sap.smd.server#SAPSUPPORT#27621##05F246247EFA11E4A8BF000000430B16#05f246247efa11e4a8bf000000430b16-0#05f246247efa11e4a8bf000000430b16#SAPEngine_Application_Thread[impl:3]_1##0#0#Error##Java###Cannot retrieve EM instance from Robomate configuration Respository
[EXCEPTION]
 {0}#1#com.sap.smd.introscope.em.IntroscopeException: All configured Enterprise Managers are offline - check configuration.
    at com.sap.sup.admin.wily.jdbc.EMOverview.getQueryEMgrs(EMOverview.java:176)
    at com.sap.sup.admin.wily.jdbc.EMOverview.populateAgentCache(EMOverview.java:510)
    at com.sap.sup.admin.wily.jdbc.EMOverview.checkAgentCache(EMOverview.java:566)
    at com.sap.sup.admin.wily.jdbc.EMOverview.getAllEMgrs(EMOverview.java:118)
    at com.sap.sup.admin.wily.jdbc.EMOverview.getAllEMgrs(EMOverview.java:105)
    at com.sap.smd.wdp.wily.emsetup.WilyEMAdminCenter.supplyEMinstanceFromABAPSource(WilyEMAdminCenter.java:547)
    at com.sap.smd.wdp.wily.emsetup.WilyEMAdminCenter.supplyEmInstances(WilyEMAdminCenter.java:723)
    at com.sap.smd.wdp.wily.emsetup.wdp.InternalWilyEMAdminCenter.supplyEmInstances(InternalWilyEMAdminCenter.java:526)
    ...more

• SAP Solution Manager 7.1
• SAP Solution Manager 7.2
• SAP Solution Manager Diagnostics

all configured Enterprise Managers are offline wily login error user password em red status cannot get list of all agents Infrastructure Preparation: Introscope Enterprise Manager offline due to java.lang.reflect.InvocationTargetException - SAP Solution Manager 7.2 , KBA , SV-SMG-DIA-WLY-EMS , Enterprise Manager Setup , Problem