[HADOOP-8144] pseudoSortByDistance in NetworkTopology doesn't work properly if no local node and first node is local rack node

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.0, 0.23.0
• Fix Version/s: 0.23.3, 2.0.2-alpha
• Component/s: io
• Labels: patch
• Hadoop Flags: Reviewed
• Assignee: Junping Du
• Reporter: Junping Du
• Created: 06/Mar/12 16:25
• Updated: 02/May/13 02:29
• Resolved: 12/Apr/12 16:40

Description

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.

Issue Links

• is depended upon by: HDFS-3258 Test for HADOOP-8144 (pseudoSortByDistance in NetworkTopology for first rack local node)
• is related to: HBASE-5843 Improve HBase MTTR - Mean Time To Recover