Regression HADOOP-7777 switch changes too clever for the StaticMapping
----------------------------------------------------------------------
Key: HADOOP-7878
URL: https://issues.apache.org/jira/browse/HADOOP-7878
Project: Hadoop Common
Issue Type: Bug
Components: util
Affects Versions: 0.23.0, 0.24.0
Reporter: Steve Loughran
Assignee: Steve Loughran
This doesn't show up until you apply the HDFS-2492 patch, but the attempt to
make the {{StaticMapping}} topology clever by deciding if it is single rack or
multi rack based on its rack->node mapping breaks the HDFS
{{TestBlocksWithNotEnoughRacks}} test. Why? Because the racks go in after the
switch topology is cached by the {{BlockManager}}, which assumes the system is
always single-switch.
Fix: default to assuming multi-switch; remove the intelligence, add a setter
for anyone who really wants to simulate single-switch racks.
Test: verify that a newly created simple mapping is multi switch
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
