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Posted to common-dev@hadoop.apache.org by "Xi Fang (JIRA)" <ji...@apache.org> on 2013/07/10 00:37:49 UTC
[jira] [Created] (HADOOP-9714) Branch-1-win TestReplicationPolicy
failed caused by stale data node handling
Xi Fang created HADOOP-9714:
-------------------------------
Summary: Branch-1-win TestReplicationPolicy failed caused by stale data node handling
Key: HADOOP-9714
URL: https://issues.apache.org/jira/browse/HADOOP-9714
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 1-win
Reporter: Xi Fang
Assignee: Xi Fang
Fix For: 1-win
Condor-Branch-1 TestReplicationPolicy failed on
* testChooseTargetWithMoreThanAvailableNodes()
* testChooseTargetWithStaleNodes()
* testChooseTargetWithHalfStaleNodes()
The root of cause of testChooseTargetWithMoreThanAvailableNodes failing is the following:
In BlockPlacementPolicyDefault#chooseTarget()
{code}
chooseRandom(numOfReplicas, NodeBase.ROOT, excludedNodes,
blocksize, maxNodesPerRack, results);
} catch (NotEnoughReplicasException e) {
FSNamesystem.LOG.warn("Not able to place enough replicas, still in need of " + numOfReplicas);
{code}
However, numOfReplicas is passed into chooseRandom() as int (primitive type in java) by value. The updating operation for numOfReplicas in chooseRandom() will not change the value in chooseTarget().
The root cause for testChooseTargetWithStaleNodes() and testChooseTargetWithHalfStaleNodes() is the current BlockPlacementPolicyDefault#chooseTarget() doesn't check if a node is stale.
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