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Posted to common-dev@hadoop.apache.org by "Amar Kamat (JIRA)" <ji...@apache.org> on 2008/11/13 09:12:46 UTC
[jira] Created: (HADOOP-4651) JobTracker.addNewTracker()
unnecessarily resolves already resolved nodes
JobTracker.addNewTracker() unnecessarily resolves already resolved nodes
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Key: HADOOP-4651
URL: https://issues.apache.org/jira/browse/HADOOP-4651
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Reporter: Amar Kamat
_hostnameToNodeMap_ maintains a map from _hostname_ to _resolved-address_. {{JobTracker.addNewTracker()}} resolves a node's address if the node is not present in _hostnameToNodeMap_ but uses _tracker-name_ to index into _hostnameToNodeMap_ instead of _hostname_.
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[jira] Commented: (HADOOP-4651) JobTracker.addNewTracker()
unnecessarily resolves already resolved nodes
Posted by "Amar Kamat (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-4651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647223#action_12647223 ]
Amar Kamat commented on HADOOP-4651:
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Note that the resolution happens only when a new tracker joins hence this should not be a big hit but its a bug.
> JobTracker.addNewTracker() unnecessarily resolves already resolved nodes
> ------------------------------------------------------------------------
>
> Key: HADOOP-4651
> URL: https://issues.apache.org/jira/browse/HADOOP-4651
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Amar Kamat
>
> _hostnameToNodeMap_ maintains a map from _hostname_ to _resolved-address_. {{JobTracker.addNewTracker()}} resolves a node's address if the node is not present in _hostnameToNodeMap_ but uses _tracker-name_ to index into _hostnameToNodeMap_ instead of _hostname_.
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