checked tx status before calling rollback

src/main/java/org/jpacrepo/service/PacmanWebService.java

@@ -16,6 +16,7 @@ import javax.ejb.TransactionManagement;
 import javax.ejb.TransactionManagementType;
 import javax.inject.Inject;
 import javax.persistence.*;
+import javax.transaction.Status;
 import javax.transaction.UserTransaction;
 import javax.ws.rs.*;
 import javax.ws.rs.core.*;
@@ -213,8 +214,12 @@ public class PacmanWebService
             }
             catch (Exception e)
             {
+                e.printStackTrace();
                 Files.delete(file.toPath());
+                if(ut.getStatus() != Status.STATUS_NO_TRANSACTION)
+                {
                     ut.rollback();
+                }
                 throw e;
             }
         }