diff --git a/maven.grammar/src/org/netbeans/modules/maven/navigator/POMModelVisitor.java b/maven.grammar/src/org/netbeans/modules/maven/navigator/POMModelVisitor.java
--- a/maven.grammar/src/org/netbeans/modules/maven/navigator/POMModelVisitor.java
+++ b/maven.grammar/src/org/netbeans/modules/maven/navigator/POMModelVisitor.java
@@ -46,7 +46,6 @@
 import java.awt.event.ActionEvent;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
-import java.io.IOException;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -107,7 +106,6 @@
 import org.netbeans.modules.maven.model.pom.Scm;
 import org.netbeans.modules.maven.model.pom.Site;
 import org.netbeans.modules.maven.model.pom.StringList;
-import org.netbeans.modules.xml.xam.Model;
 import org.openide.nodes.AbstractNode;
 import org.openide.nodes.Children;
 import org.openide.nodes.Node;
@@ -150,25 +148,9 @@
     @Override
     public void visit(Project target) {
         Project t = target;
-        if (t != null && (!t.isInDocumentModel() || !t.getModel().getState().equals(Model.State.VALID))) {
-            POMModel mdl = t.getModel();
-            if (!mdl.getState().equals(Model.State.VALID)) {
-                try {
-                    mdl.sync();
-                } catch (IOException ex) {
-                    LOG.log(Level.INFO, null, ex);
-                }
-            }
-            t = t.getModel().getProject();
-        }
         //ordered by appearance in pom schema..
         POMQNames names = parent.getPOMQNames();
-        try {
             checkChildString(names.MODELVERSION, NbBundle.getMessage(POMModelVisitor.class, "MODEL_VERSION"), t != null ? t.getModelVersion() : null);
-        } catch (IllegalStateException x) {
-            LOG.log(Level.WARNING, "#190041: invalid model: {0}", x.toString());
-            return;
-        }
         checkChildString(names.GROUPID, NbBundle.getMessage(POMModelVisitor.class, "GROUPID"), t != null ? t.getGroupId() : null);
         checkChildString(names.ARTIFACTID, NbBundle.getMessage(POMModelVisitor.class, "ARTIFACTID"), t != null ? t.getArtifactId() : null);
         if (count == 0 && t != null && t.getPackaging() != null) {
@@ -1471,16 +1453,34 @@
         private List<POMCutHolder> rescan(POMModelVisitor visitor) {
             try {
                 Method m = POMModelVisitor.class.getMethod("visit", type); //NOI18N
-                POMModel[] models = parentHolder.getSource();
-                Object[] cuts = parentHolder.getCutValues();
-                for (int i = 0; i < cuts.length; i++) {
-                    Object cut = cuts[i];
-                    // prevent deadlock 185923
+                for (Object cut : parentHolder.getCutValues()) {
                     if (cut != null && !type.isInstance(cut)) {
                         LOG.log(Level.WARNING, "#185428: {0} is not assignable to {1}", new Object[] {cut, type});
                         continue;
                     }
-                    synchronized (i < models.length ? models[i] : /*#192042*/new Object()) {
+                    if (cut instanceof POMComponent) {
+                        POMModel model = ((POMComponent) cut).getModel();
+                        if (model.startTransaction()) {
+                            try {
+                                if (!((POMComponent) cut).isInDocumentModel()) {
+                                    LOG.log(Level.WARNING, "#190041: entry of {0} is no longer valid, skipping", type.getSimpleName());
+                                    continue;
+                                }
+                                switch (model.getState()) {
+                                case VALID:
+                                    m.invoke(visitor, cut);
+                                    break;
+                                default:
+                                    LOG.log(Level.WARNING, "skipping invalid ({0}) model", model.getState());
+                                }
+                            } finally {
+                                model.endTransaction();
+                            }
+                        } else {
+                            LOG.warning("could not start transaction");
+                        }
+                    } else {
+                        // XXX is this even possible?
                         m.invoke(visitor, cut);
                     }
                 }