[HBASE-14977] ChoreService.shutdown may result in ConcurrentModificationException

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.2.0, 1.3.0, 1.1.3, 2.0.0
• Component/s: util
• Hadoop Flags: Reviewed
• Assignee: Vladimir Rodionov
• Reporter: Vladimir Rodionov
• Created: 15/Dec/15 00:02
• Updated: 27/Jan/16 15:28
• Resolved: 22/Dec/15 10:58

Description

As seen in this test:
https://builds.apache.org/job/HBase-1.3/jdk=latest1.8,label=Hadoop/425/artifact/hbase-server/target/surefire-reports/org.apache.hadoop.hbase.regionserver.compactions.TestFIFOCompactionPolicy-output.txt

We need to make shutdown method synchronized to avoid this issue.