[YARN-9010] Fix the incorrect trailing slash deletion in constructor method of CGroupsHandlerImpl

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Hadoop Flags: Reviewed
• Assignee: Zhankun Tang
• Reporter: Zhankun Tang
• Created: 12/Nov/18 06:40
• Updated: 29/Nov/18 23:19
• Resolved: 29/Nov/18 23:04

Description

In constructor method of CGroupsHandlerImpl:

this.cGroupPrefix = conf.get(YarnConfiguration.
 NM_LINUX_CONTAINER_CGROUPS_HIERARCHY, "/hadoop-yarn")
 .replaceAll("^/", "").replaceAll("$/", "");

The "$/" regex expression is not working. And "^/" for leading slash handling is also not good enough.