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HADOOP-8159. NetworkTopology: getLeaf should check for invalid topologies. Contributed by Colin Patrick McCabe

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1304118 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Eli Collins 2012-03-22 22:43:28 +00:00
parent 0259a3ea6b
commit b5a8ccb75b
2 changed files with 26 additions and 0 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -264,6 +264,9 @@ Release 0.23.3 - UNRELEASED
HADOOP-8197. Configuration logs WARNs on every use of a deprecated key (tucu)
HADOOP-8159. NetworkTopology: getLeaf should check for invalid topologies.
(Colin Patrick McCabe via eli)
BREAKDOWN OF HADOOP-7454 SUBTASKS
HADOOP-7455. HA: Introduce HA Service Protocol Interface. (suresh)

23
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/NetworkTopology.java
View File

@ -45,6 +45,13 @@ public class NetworkTopology {
public static final Log LOG =
LogFactory.getLog(NetworkTopology.class);
public static class InvalidTopologyException extends RuntimeException {
private static final long serialVersionUID = 1L;
public InvalidTopologyException(String msg) {
super(msg);
}
}
/** InnerNode represents a switch/router of a data center or rack.
* Different from a leaf node, it has non-null children.
*/
@ -311,6 +318,8 @@ int getNumOfLeaves() {
* the root cluster map
*/
InnerNode clusterMap = new InnerNode(InnerNode.ROOT);
/** Depth of all leaf nodes */
private int depthOfAllLeaves = -1;
/** rack counter */
private int numOfRacks = 0;
/** the lock used to manage access */
@ -328,6 +337,7 @@ public NetworkTopology() {
*/
public void add(Node node) {
if (node==null) return;
String oldTopoStr = this.toString();
if( node instanceof InnerNode ) {
throw new IllegalArgumentException(
"Not allow to add an inner node: "+NodeBase.getPath(node));
@ -345,6 +355,19 @@ public void add(Node node) {
if (rack == null) {
numOfRacks++;
}
if (!(node instanceof InnerNode)) {
if (depthOfAllLeaves == -1) {
depthOfAllLeaves = node.getLevel();
} else {
if (depthOfAllLeaves != node.getLevel()) {
LOG.error("Error: can't add leaf node at depth " +
node.getLevel() + " to topology:\n" + oldTopoStr);
throw new InvalidTopologyException("Invalid network topology. " +
"You cannot have a rack and a non-rack node at the same " +
"level of the network topology.");
}
}
}
}
if(LOG.isDebugEnabled()) {
LOG.debug("NetworkTopology became:\n" + this.toString());