[HDFS-12463] Ozone: Fix TestXceiverClientMetrics#testMetrics

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: HDFS-7240
• Component/s: ozone
• Target Version/s: HDFS-7240
• Assignee: Yiqun Lin
• Reporter: Weiwei Yang
• Created: 15/Sep/17 06:16
• Updated: 18/Sep/17 08:57
• Resolved: 18/Sep/17 08:57

Description

TestXceiverClientMetrics#testMetrics is failing with following error in recent jenkins job,

java.util.ConcurrentModificationException: null
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
	at java.util.ArrayList$Itr.next(ArrayList.java:851)
	at org.apache.hadoop.ozone.scm.TestXceiverClientMetrics.lambda$testMetrics$2(TestXceiverClientMetrics.java:134)

looks like a non thread safe list caused this race condition in the test case.

Issue Links

• is duplicated by: HDFS-12268 Ozone: Add metrics for pending storage container requests