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Hadoop QA commented on HDFS-3107: --------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12671164/HDFS-3107.patch against trunk revision 428a766. {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 1 new or modified test files. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. There were no new javadoc warning messages. {color:green}+1 eclipse:eclipse{color}. The patch built with eclipse:eclipse. {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 2.0.3) warnings. {color:red}-1 release audit{color}. The applied patch generated 1 release audit warnings. {color:red}-1 core tests{color}. The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs: org.apache.hadoop.hdfs.web.TestWebHdfsFileSystemContract org.apache.hadoop.hdfs.server.namenode.ha.TestPipelinesFailover org.apache.hadoop.hdfs.tools.offlineEditsViewer.TestOfflineEditsViewer org.apache.hadoop.hdfs.TestDFSInotifyEventInputStream {color:green}+1 contrib tests{color}. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8199//testReport/ Release audit warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/8199//artifact/PreCommit-HADOOP-Build-patchprocess/patchReleaseAuditProblems.txt Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8199//console This message is automatically generated. > HDFS truncate > ------------- > > Key: HDFS-3107 > URL: https://issues.apache.org/jira/browse/HDFS-3107 > Project: Hadoop HDFS > Issue Type: New Feature > Components: datanode, namenode > Reporter: Lei Chang > Assignee: Plamen Jeliazkov > Attachments: HDFS-3107.patch, HDFS-3107.patch, HDFS-3107.patch, > HDFS_truncate.pdf, HDFS_truncate_semantics_Mar15.pdf, > HDFS_truncate_semantics_Mar21.pdf > > Original Estimate: 1,344h > Remaining Estimate: 1,344h > > Systems with transaction support often need to undo changes made to the > underlying storage when a transaction is aborted. Currently HDFS does not > support truncate (a standard Posix operation) which is a reverse operation of > append, which makes upper layer applications use ugly workarounds (such as > keeping track of the discarded byte range per file in a separate metadata > store, and periodically running a vacuum process to rewrite compacted files) > to overcome this limitation of HDFS. -- This message was sent by Atlassian JIRA (v6.3.4#6332)