[YARN-8162] Remove Method DirectoryCollection#verifyDirUsingMkdir

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.2.0
• Component/s: nodemanager
• Hadoop Flags: Reviewed
• Assignee: Yufei Gu
• Reporter: Yufei Gu
• Created: 14/Apr/18 00:26
• Updated: 16/Apr/18 22:05
• Resolved: 16/Apr/18 22:05

Description

First of all, DirectoryCollection#verifyDirUsingMkdir doesn't do what it claims to do, it creates a file but its Java doc says it create a dir. Because of that, it doesn't compatible with ReadWriteDiskValidator because the validator will throw an exception if it isn't dir. What's more, it is no longer needed after HADOOP-13738 (DiskChecker should perform some disk IO). It duplicates what HADOOP-13738 does. We should remove it.