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Posted to hdfs-dev@hadoop.apache.org by "Yongjun Zhang (JIRA)" <ji...@apache.org> on 2014/02/19 01:51:29 UTC
[jira] [Created] (HDFS-5972) callers of NetworkTopology's
chooseRandom method to expect null return value
Yongjun Zhang created HDFS-5972:
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Summary: callers of NetworkTopology's chooseRandom method to expect null return value
Key: HDFS-5972
URL: https://issues.apache.org/jira/browse/HDFS-5972
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Affects Versions: 2.3.0
Reporter: Yongjun Zhang
Class NetworkTopology's method
public Node chooseRandom(String scope)
calls
private Node chooseRandom(String scope, String excludedScope)
which may return null value.
Callers of this method such as BlockPlacementPolicyDefault etc need to be aware that.
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