Details
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Bug
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Status: Resolved
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Major
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Resolution: Fixed
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2.10.0
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None
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Reviewed
Description
Running DU across lots of disks is very expensive . We applied the patch HDFS-14313 to get used space from ReplicaInfo in memory.However, new du threads throw the exception
// 2019-11-08 18:07:13,858 ERROR [refreshUsed-/home/vipshop/hard_disk/7/dfs/dn/current/BP-1203969992-XXXX-1450855658517] org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReplicaCachingGetSpaceUsed: ReplicaCachingGetSpaceUsed refresh error java.util.ConcurrentModificationException: Tree has been modified outside of iterator at org.apache.hadoop.hdfs.util.FoldedTreeSet$TreeSetIterator.checkForModification(FoldedTreeSet.java:311) at org.apache.hadoop.hdfs.util.FoldedTreeSet$TreeSetIterator.hasNext(FoldedTreeSet.java:256) at java.util.AbstractCollection.addAll(AbstractCollection.java:343) at java.util.HashSet.<init>(HashSet.java:120) at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.deepCopyReplica(FsDatasetImpl.java:1052) at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ReplicaCachingGetSpaceUsed.refresh(ReplicaCachingGetSpaceUsed.java:73) at org.apache.hadoop.fs.CachingGetSpaceUsed$RefreshThread.run(CachingGetSpaceUsed.java:178) at java.lang.Thread.run(Thread.java:748)
Attachments
Attachments
Issue Links
- is caused by
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HDFS-14313 Get hdfs used space from FsDatasetImpl#volumeMap#ReplicaInfo in memory instead of df/du
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- Resolved
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