com.google.gwt.user.server.rpc.UnexpectedException

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    • com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public org.pentaho.platform.dataaccess.datasource.beans.SerializedResultSet org.pentaho.platform.dataaccess.datasource.wizard.service.impl.DSWDatasourceServiceImpl.doPreview(java.lang.String,java.lang.String,java.lang.String) throws org.pentaho.platform.dataaccess.datasource.wizard.service.DatasourceServiceException' threw an unexpected exception: java.lang.NullPointerException at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:389)

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