[HDFS-3005] ConcurrentModificationException in FSDataset$FSVolume.getDfsUsed(..)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha
• Fix Version/s: 2.0.0-alpha
• Component/s: datanode
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 23/Feb/12 20:08
• Updated: 28/Sep/15 20:58
• Resolved: 15/Mar/12 18:29

Description

Saw this in build #1888.

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
	at java.util.HashMap$EntryIterator.next(HashMap.java:834)
	at java.util.HashMap$EntryIterator.next(HashMap.java:832)
	at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.getDfsUsed(FSDataset.java:557)
	at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.getDfsUsed(FSDataset.java:809)
	at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.access$1400(FSDataset.java:774)
	at org.apache.hadoop.hdfs.server.datanode.FSDataset.getDfsUsed(FSDataset.java:1124)
	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.sendHeartBeat(BPOfferService.java:406)
	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.offerService(BPOfferService.java:490)
	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.run(BPOfferService.java:635)
	at java.lang.Thread.run(Thread.java:662)