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https://issues.apache.org/jira/browse/HDFS-5001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suresh Srinivas updated HDFS-5001:
----------------------------------
Assignee: Xi Fang
> Branch-1-Win TestAzureBlockPlacementPolicy and
> TestReplicationPolicyWithNodeGroup failed caused by 1) old APIs and 2)
> incorrect value of depthOfAllLeaves
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-5001
> URL: https://issues.apache.org/jira/browse/HDFS-5001
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 1-win
> Reporter: Xi Fang
> Assignee: Xi Fang
> Fix For: 1-win
>
> Attachments: HDFS-5001.patch
>
>
> After the backport patch of HDFS-4975 was committed,
> TestAzureBlockPlacementPolicy and TestReplicationPolicyWithNodeGroup failed.
> The cause for the failure of TestReplicationPolicyWithNodeGroup is that some
> part in the patch of HDFS-3941 is missing. Our patch for HADOOP-495 makes
> methods in super class to be called incorrectly. More specifically, HDFS-4975
> backported HDFS-4350, HDFS-4351, and HDFS-3912 to enable the method parameter
> "boolean avoidStaleNodes", and updated the APIs in
> BlockPlacementPolicyDefault. However, the override methods in
> ReplicationPolicyWithNodeGroup weren't updated.
> The cause for the failure of TestAzureBlockPlacementPolicy is similar.
> In addition, TestAzureBlockPlacementPolicy has an error. Here is the error
> info.
> Testcase: testPolicyWithDefaultRacks took 0.005 sec
> Caused an ERROR
> Invalid network topology. You cannot have a rack and a non-rack node at the
> same level of the network topology.
> org.apache.hadoop.net.NetworkTopology$InvalidTopologyException: Invalid
> network topology. You cannot have a rack and a non-rack node at the same
> level of the network topology.
> at org.apache.hadoop.net.NetworkTopology.add(NetworkTopology.java:396)
> at
> org.apache.hadoop.hdfs.server.namenode.TestAzureBlockPlacementPolicy.testPolicyWithDefaultRacks(TestAzureBlockPlacementPolicy.java:779)
> The error is caused by a check in NetworkTopology#add(Node node)
> {code}
> 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.");
> }
> {code}
> The problem of this check is that when we use NetworkTopology#remove(Node
> node) to remove a node from the cluster, depthOfAllLeaves won't change. As a
> result, we can't reset the value of NetworkTopology#depathOfAllLeaves of the
> old topology of a cluster by just removing all its dataNode. See
> TestAzureBlockPlacementPolicy#testPolicyWithDefaultRacks()
> {code}
> // clear the old topology
> for (Node node : dataNodes) {
> cluster.remove(node);
> }
> {code}
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