Deactivate Portal server node from Web dispatcher, but still keep online
We want to deactivate a Portal server node from the Web dispatcher. We also need to connect directly to the specific node.
We configured the Server Node using Config Tool --> Server_ID####### --> Debug --> Debuggable --> Restricted Load Balancing. The node is not available to the Web dispatcher, However we are unable to explicitly connect to that node. We get the error message in the browser:
503 Service Unavailable
SAP WebAS engine is starting...
If this state does not change within a few minutes,
please contact your system administrator.
Check the recommendations in SAP Notes: 943498, 764417
Message: Dispatcher running but no server connected!
I have also read through the Web dispatcher online Help. They mention creating groups but they all seem to pertain to ABAP groups using SMLG. Our Web dispatcher is used in a strictly J2EE environment.
There must be a Profile setting or some config to restrict specified nodes... Let me know if you have found out?
Thank You,
Jon Sells
Hi PR,
Yes I understand that the Web Dispatchers Job ends at that point. That's why I want to stop the requests at the Web dispatcher by not allowing those nodes to be available.
Here is the situation. We have 3 Windows Servers with 10 Server Nodes spread accros them.
Host A - 2 Server Nodes, Central instance (Message Server) and SQL Server DB.
Host B - 4 Server Nodes.
Host C - 4 Server Nodes.
The Going Live Analysis suggested we move the DB off of the CI. We cannot do that at this time. What we can do is shut down the 2 nodes on Host A. Instead of shutting them down, we would rather remove them from the WD group. that way, our users never connect to the 2 nodes on the CI but Basis can still use them for Administration and those 2 nodes on the CI are never used for production purposes. Those nodes will just be used for monitoring and maintenance or even emergency purposes.
Right now our process to remove the 2 nodes from the Web dispatcher is to connect to the Admin page for Web Dispatcher --> Monitor Server Groups --> Right Click on the Host and select Deactivate. We have to do this whenever the Message Server is retarted. The million dollar question: How can that be set via a startup parameter?
Thanks
Jon Sells
Here is an example of how you can connect to a specific node:
https://<Host_name>.domain.local/b2b/b2b/init.do;sapj2ee_irj=7501753
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import javax.swing.JTree;
import javax.swing.JScrollPane;
import javax.swing.JOptionPane;
import javax.swing.JCheckBox;
import javax.swing.JPanel;
import javax.swing.tree.TreePath;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.DefaultMutableTreeNode;
import java.awt.Dimension;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;
class FilteredTree
private class PlainBelliedSneech {
public String toString() { return "Plain Bellied Sneech"; }
private class StarBelliedSneech {
public String toString() { return "Star Bellied Sneech"; }
private class FilteredTreeModel
extends DefaultTreeModel
private boolean mShowStarBelliedSneeches= true;
private DefaultMutableTreeNode mRoot;
FilteredTreeModel(DefaultMutableTreeNode root)
super(root);
mRoot= root;
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DefaultMutableTreeNode node=
(DefaultMutableTreeNode) parent;
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int pos= 0;
for (int i= 0, cnt= 0; i< node.getChildCount(); i++) {
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pos= i;
break;
return node.getChildAt(pos);
public int getChildCount(Object parent)
DefaultMutableTreeNode node=
(DefaultMutableTreeNode) parent;
if (mShowStarBelliedSneeches)
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int childCount= 0;
Enumeration children= node.children();
while (children.hasMoreElements()) {
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public void setShowStarBelliedSneeches(boolean showStarBelliedSneeches)
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mShowStarBelliedSneeches= showStarBelliedSneeches;
Object[] path= { mRoot };
int[] childIndices= new int[root.getChildCount()];
Object[] children= new Object[root.getChildCount()];
for (int i= 0; i< root.getChildCount(); i++) {
childIndices= i;
children[i]= root.getChildAt(i);
fireTreeStructureChanged(this, path, childIndices, children);
private FilteredTree()
final DefaultMutableTreeNode root= new DefaultMutableTreeNode("Root");
DefaultMutableTreeNode parent;
DefaultMutableTreeNode child;
for (int i= 0; i< 2; i++) {
parent= new DefaultMutableTreeNode(new PlainBelliedSneech());
root.add(parent);
for (int j= 0; j< 2; j++) {
child= new DefaultMutableTreeNode(new StarBelliedSneech());
parent.add(child);
for (int k= 0; k< 2; k++)
child.add(new DefaultMutableTreeNode(new PlainBelliedSneech()));
for (int j= 0; j< 2; j++)
parent.add(new DefaultMutableTreeNode(new PlainBelliedSneech()));
parent= new DefaultMutableTreeNode(new StarBelliedSneech());
root.add(parent);
for (int j= 0; j< 2; j++) {
child= new DefaultMutableTreeNode(new PlainBelliedSneech());
parent.add(child);
for (int k= 0; k< 2; k++)
child.add(new DefaultMutableTreeNode(new StarBelliedSneech()));
for (int j= 0; j< 2; j++)
parent.add(new DefaultMutableTreeNode(new StarBelliedSneech()));
final FilteredTreeModel model= new FilteredTreeModel(root);
JTree tree= new JTree(model);
tree.setShowsRootHandles(true);
tree.putClientProperty("JTree.lineStyle", "Angled");
tree.setRootVisible(false);
JScrollPane sp= new JScrollPane(tree);
sp.setPreferredSize(new Dimension(200,400));
final JCheckBox check= new JCheckBox("Show Star Bellied Sneeches");
check.setSelected(model.getShowStarBelliedSneeches());
check.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
model.setShowStarBelliedSneeches(check.isSelected());
JPanel panel= new JPanel(new BorderLayout());
panel.add(check, BorderLayout.NORTH);
panel.add(sp, BorderLayout.CENTER);
JOptionPane.showOptionDialog(
null, panel, "Sneeches on Beeches",
JOptionPane.DEFAULT_OPTION,
JOptionPane.PLAIN_MESSAGE,
null, new String[0], null
System.exit(0);
public static void main(String[] argv) {
new FilteredTree(); -
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