oracle.sysman.emSDK.app.exception.EMSystemException

Unable to open application in EM :: 

oracle.sysman.emSDK.app.exception.EMSystemException

Sometimes, opening a deployed application doesn't appear in EM under soa-infra tree, but exists in the list when you click on the partition. And when you click on the project from the list, it gives an error with a pop-up with a similar error as below

ADF_FACES-60097:For more information, please see the server's error log for an entry beginning with:  

ADF_FACES-60096:Server Exception during PPR, #2[[

javax.el.ELException: oracle.sysman.emSDK.app.exception.EMSystemException

  at javax.el.BeanELResolver.getValue(BeanELResolver.java:298)

  at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:173)

  at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:200)

  at com.sun.el.parser.AstValue.getValue(AstValue.java:138)

  at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:206)

  at org.apache.myfaces.trinidad.bean.FacesBeanImpl.getProperty(FacesBeanImpl.java:68)

  at org.apache.myfaces.trinidad.component.FacesBeanWrapper.getProperty(FacesBeanWrapper.java:58)

  at org.apache.myfaces.trinidad.component.UIXTable$RowKeyFacesBeanWrapper.getProperty        

      (UIXTable.java:630)

  at org.apache.myfaces.trinidad.component.UIXComponentBase.getProperty(UIXComponentBase.java:1353)

  at org.apache.myfaces.trinidad.component.UIXIterator.getValue(UIXIterator.java:722)

  at org.apache.myfaces.trinidad.component.UIXCollection.__flushCachedModel(UIXCollection.java:1438)

To resolve described issue (I checked this out) you have two ways:

1. Restart Admin Server
2. Restart EM application

            Just go to console --> Deployments --> stop & start the 'em' application

The full restart of the AdminServer worked for me every time. Restart of the EM sometimes causes the crash of the EM application.

Now, you'll see all the deployments in the EM soa-infra tree, as well as you'll be able to open the project.