messages1.addErrorsOperationAlreadyRunning("prop", "host1");
        assertFalse(messages1.isEmpty());

        final FessMessages messages2 = new FessMessages();
        messages2.addErrorsOperationAlreadyRunning("prop", "node1@host2");
        assertFalse(messages2.isEmpty());
    }

    // ===================================================================================

    MutableGraph<N> subgraph =
        (nodes instanceof Collection)
            ? GraphBuilder.from(graph).expectedNodeCount(((Collection) nodes).size()).build()
            : GraphBuilder.from(graph).build();
    for (N node : nodes) {
      subgraph.addNode(node);
    }
    for (N node : subgraph.nodes()) {
      for (N successorNode : graph.successors(node)) {

NODES=4

args1=()
args2=()
for i in $(seq 1 $NODES); do
	args1+=("http://localhost:$((9000 + i))/tmp/xl/1/$i ")
	args2+=("http://localhost:$((9100 + i))/tmp/xl/2/$i ")
done

for i in $(seq 1 $NODES); do
	./minio server --address "127.0.0.1:$((9000 + i))" ${args1[@]} & # | tee /tmp/minio/node.$i &

        nodes.add(node);
    }

    /**
     * find a node by the GAV (metadata)
     *
     * @param md
     */
    public MetadataGraphNode findNode(MavenArtifactMetadata md) {
        for (MetadataGraphNode mgn : nodes) {
            if (mgn.metadata.equals(md)) {
                return mgn;
            }
        }

        MetadataGraphNode node = new MetadataGraphNode(md);
        addNode(node);

### Node Binaries

filename | sha512 hash
-------- | -----------
[kubernetes-node-linux-amd64.tar.gz](https://dl.k8s.io/v1.14.10/kubernetes-node-linux-amd64.tar.gz) | `3f509a406e2c1c889ad447d37f9f34043d61f7e60f14dad2c6a94980283381695e99d058b6a783423d4c5e742d1d6c0c0e16b049dc2e49b6f203bce7c97da025`

* **No code reviews**: There's no code to review. No PRs to approve. No comments to address. Embrace vibe coding fully, replace the theater of approving and merging vibe coded PRs that no one looks at with full proper vibes only.

/// tip

This is the ultimate **vibe-driven development** experience. You don't need to think about what your API does, just let the LLM handle it. 🧘

///

    for (Integer node : graph.nodes()) {
      new EqualsTester()
          .addEqualityGroup(
              graph.predecessors(node), graph.successors(node), graph.adjacentNodes(node))
          .testEquals();
    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {
    assume().that(graphIsMutable()).isTrue();

    Set<Integer> nodes = graph.nodes();

	// first node. The following is required to serialize (the effects of)
	// concurrent rebalance-start commands.
	if ep := globalEndpoints[0].Endpoints[0]; !ep.IsLocal {
		for nodeIdx, proxyEp := range globalProxyEndpoints {
			if proxyEp.Host == ep.Host {
				if proxied, success := proxyRequestByNodeIndex(ctx, w, r, nodeIdx, false); proxied && success {
					return
				}
			}
		}

	Version string   `json:"version"` // Version of the current `xl.meta`.
	Format  string   `json:"format"`  // Format of the current `xl.meta`.
	Stat    StatInfo `json:"stat"`    // Stat of the current object `xl.meta`.
	// Erasure coded info for the current object `xl.meta`.
	Erasure ErasureInfo `json:"erasure"`
	// MinIO release tag for current object `xl.meta`.
	Minio struct {
		Release string `json:"release"`
	} `json:"minio"`

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {
    assume().that(graphIsMutable()).isTrue();

    Set<Integer> nodes = graph.nodes();
    assertThrows(UnsupportedOperationException.class, () -> nodes.add(N2));
    addNode(N1);
    assertThat(graph.nodes()).containsExactlyElementsIn(nodes);
  }

  @Override
  @Test
  public void adjacentNodes_checkReturnedSetMutability() {