pseudoSortByDistance in NetworkTopology doesn't work properly if no local node
and first node is local rack node
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Key: HADOOP-8144
URL: https://issues.apache.org/jira/browse/HADOOP-8144
Project: Hadoop Common
Issue Type: Bug
Components: io
Affects Versions: 1.0.0, 0.23.0
Reporter: Junping Du
Priority: Minor
pseudoSortByDistance in NetworkTopology.java should sort nodes according to its
distance with reader as local node, local rack node, ...
But if there is no local node with reader in nodes and the first node is local
rack node with reader, then it will put a random node at position 0.
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