Filter out nodes that don't have NodeResources from the topo viz

ui/app/components/topo-viz.js

@@ -83,10 +83,18 @@ export default class TopoViz extends Component {
     const nodes = this.args.nodes;
     const allocations = this.args.allocations;
 
+    // Nodes may not have a resources property due to having an old Nomad agent version.
+    const badNodes = [];
+
     // Wrap nodes in a topo viz specific data structure and build an index to speed up allocation assignment
     const nodeContainers = [];
     const nodeIndex = {};
     nodes.forEach(node => {
+      if (!node.resources) {
+        badNodes.push(node);
+        return;
+      }
+
       const container = this.dataForNode(node);
       nodeContainers.push(container);
       nodeIndex[node.id] = container;
@@ -99,7 +107,7 @@ export default class TopoViz extends Component {
       const nodeId = allocation.belongsTo('node').id();
       const nodeContainer = nodeIndex[nodeId];
 
-      // Ignore orphaned allocations
+      // Ignore orphaned allocations and allocations on nodes with an old Nomad agent version.
       if (!nodeContainer) return;
 
       const allocationContainer = this.dataForAllocation(allocation, nodeContainer);
@@ -131,6 +139,15 @@ export default class TopoViz extends Component {
         .domain(extent(nodeContainers.mapBy('memory'))),
     };
     this.topology = topology;
+
+    if (badNodes.length && this.args.onDataError) {
+      this.args.onDataError([
+        {
+          type: 'filtered-nodes',
+          context: badNodes,
+        },
+      ]);
+    }
   }
 
   @action

ui/tests/integration/components/topo-viz-test.js

@@ -39,7 +39,8 @@ module('Integration | Component | TopoViz', function(hooks) {
       @nodes={{this.nodes}}
       @allocations={{this.allocations}}
       @onAllocationSelect={{this.onAllocationSelect}}
-      @onNodeSelect={{this.onNodeSelect}} />
+      @onNodeSelect={{this.onNodeSelect}}
+      @onDataError={{this.onDataError}} />
   `;
 
   test('presents as a FlexMasonry of datacenters', async function(assert) {
@@ -167,4 +168,35 @@ module('Integration | Component | TopoViz', function(hooks) {
     await TopoViz.datacenters[0].nodes[0].memoryRects[0].select();
     assert.equal(TopoViz.allocationAssociations.length, 0);
   });
+
+  test('when one or more nodes are missing the resources property, those nodes are filtered out of the topology view and onDataError is called', async function(assert) {
+    const badNode = node('dc1', 'node0', 1000, 500);
+    delete badNode.resources;
+
+    this.setProperties({
+      nodes: [badNode, node('dc1', 'node1', 1000, 500)],
+      allocations: [
+        alloc('node0', 'job1', 'group', 100, 100),
+        alloc('node0', 'job1', 'group', 100, 100),
+        alloc('node1', 'job1', 'group', 100, 100),
+        alloc('node1', 'job1', 'group', 100, 100),
+        alloc('node0', 'job1', 'groupTwo', 100, 100),
+      ],
+      onNodeSelect: sinon.spy(),
+      onAllocationSelect: sinon.spy(),
+      onDataError: sinon.spy(),
+    });
+
+    await this.render(commonTemplate);
+
+    assert.ok(this.onDataError.calledOnce);
+    assert.deepEqual(this.onDataError.getCall(0).args[0], [
+      {
+        type: 'filtered-nodes',
+        context: [this.nodes[0]],
+      },
+    ]);
+
+    assert.equal(TopoViz.datacenters[0].nodes.length, 1);
+  });
 });