[HADOOP-13556] Change Configuration.getPropsWithPrefix to use getProps instead of iterator

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.9.0, 3.0.0
• Target Version/s: 2.9.0, 3.0.0
• Assignee: Larry McCay
• Reporter: Larry McCay
• Created: 28/Aug/16 16:51
• Updated: 19/Oct/18 00:19
• Resolved: 11/Oct/17 22:26

Description

Current implementation of getPropsWithPrefix uses the Configuration.iterator() method. This method is not threadsafe.

This patch will reimplement the gathering of properties that begin with a prefix by using the safe getProps() method.

Issue Links

• causes: HADOOP-15357 Configuration.getPropsWithPrefix no longer does variable substitution
• duplicates: YARN-8109 Resource Manager WebApps fails to start due to ConcurrentModificationException
• is related to: HADOOP-15411 AuthenticationFilter should use Configuration.getPropsWithPrefix instead of iterator
• is related to: HADOOP-15418 Hadoop KMSAuthenticationFilter needs to use getPropsByPrefix instead of iterator to avoid ConcurrentModificationException
• is related to: HADOOP-13008 Add XFS Filter for UIs to Hadoop Common