[HDFS-3682] MiniDFSCluster#init should provide more info when it fails

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha
• Fix Version/s: 2.0.3-alpha
• Component/s: test
• Labels: test-fail
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Eli Collins
• Created: 19/Jul/12 17:32
• Updated: 15/Jan/15 09:33
• Resolved: 07/Oct/12 21:24

Description

I've seen the occasional test failure due to the MiniDFSCluster init failing due to "java.io.IOException: Cannot remove data directory" for the target/test/data/dfs/data directory. We should improve the error handling here so we can better understand the failure, eg perhaps one of the tests that chmods a directory fails and causes this failure.

org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:596)
at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:297)
at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:116)
at org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:279)
at org.apache.hadoop.hdfs.security.TestDelegationToken.setUp(TestDelegationToken.java:77