[
https://issues.apache.org/jira/browse/HADOOP-9152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13538777#comment-13538777
]
Hudson commented on HADOOP-9152:
--------------------------------
Integrated in Hadoop-Hdfs-0.23-Build #471 (See
[https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/471/])
HADOOP-9152. HDFS can report negative DFS Used on clusters with very small
amounts of data (Brock Noland via tgraves) (Revision 1425095)
Result = UNSTABLE
tgraves :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1425095
Files :
*
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/DU.java
*
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestDU.java
> HDFS can report negative DFS Used on clusters with very small amounts of data
> -----------------------------------------------------------------------------
>
> Key: HADOOP-9152
> URL: https://issues.apache.org/jira/browse/HADOOP-9152
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.0.2-alpha
> Reporter: Brock Noland
> Assignee: Brock Noland
> Priority: Minor
> Fix For: 2.0.3-alpha, 0.23.6
>
> Attachments: HDFS-4229-0.patch.txt
>
>
> I had a near empty HDFS instance where I was creating a file and deleting it
> very quickly. I noticed that HDFS sometimes reported a negative DFS used.
> {noformat}
> root@brock0-1 ~]# sudo -u hdfs -i hdfs dfsadmin -report
> Configured Capacity: 97233235968 (90.56 GB)
> Present Capacity: 84289609707 (78.5 GB)
> DFS Remaining: 84426645504 (78.63 GB)
> DFS Used: -137035797 (-133824.02 KB)
> DFS Used%: -0.16%
> Under replicated blocks: 0
> Blocks with corrupt replicas: 0
> Missing blocks: 0
> -------------------------------------------------
> Datanodes available: 1 (1 total, 0 dead)
> Live datanodes:
> Name: 127.0.0.1:50010 (localhost)
> Hostname: brock0-1.ent.cloudera.com
> Decommission Status : Normal
> Configured Capacity: 97233235968 (90.56 GB)
> DFS Used: -137035797 (-133824.02 KB)
> Non DFS Used: 12943626261 (12.05 GB)
> DFS Remaining: 84426645504 (78.63 GB)
> DFS Used%: -0.14%
> DFS Remaining%: 86.83%
> Last contact: Thu Nov 22 18:25:37 PST 2012
> [root@brock0-1 ~]# sudo -u hdfs -i hdfs dfsadmin -report
> Configured Capacity: 97233235968 (90.56 GB)
> Present Capacity: 84426973184 (78.63 GB)
> DFS Remaining: 84426629120 (78.63 GB)
> DFS Used: 344064 (336 KB)
> DFS Used%: 0%
> Under replicated blocks: 0
> Blocks with corrupt replicas: 0
> Missing blocks: 0
> -------------------------------------------------
> Datanodes available: 1 (1 total, 0 dead)
> Live datanodes:
> Name: 127.0.0.1:50010 (localhost)
> Hostname: brock0-1.ent.cloudera.com
> Decommission Status : Normal
> Configured Capacity: 97233235968 (90.56 GB)
> DFS Used: 344064 (336 KB)
> Non DFS Used: 12806262784 (11.93 GB)
> DFS Remaining: 84426629120 (78.63 GB)
> DFS Used%: 0%
> DFS Remaining%: 86.83%
> Last contact: Thu Nov 22 18:28:47 PST 2012
> {noformat}
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