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Hadoop QA commented on HDFS-4140: --------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12560910/HDFS-4140.008.patch against trunk revision . {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}. The javadoc tool did not generate any 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 1.3.9) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of 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.TestPersistBlocks org.apache.hadoop.hdfs.server.blockmanagement.TestRBWBlockInvalidation {color:green}+1 contrib tests{color}. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3664//testReport/ Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3664//console This message is automatically generated. > fuse-dfs handles open(O_TRUNC) poorly > ------------------------------------- > > Key: HDFS-4140 > URL: https://issues.apache.org/jira/browse/HDFS-4140 > Project: Hadoop HDFS > Issue Type: Bug > Components: fuse-dfs > Affects Versions: 2.0.2-alpha > Reporter: Andy Isaacson > Assignee: Colin Patrick McCabe > Attachments: HDFS-4140.003.patch, HDFS-4140.004.patch, > HDFS-4140.005.patch, HDFS-4140.006.patch, HDFS-4140.007.patch, > HDFS-4140.008.patch > > > fuse-dfs handles open(O_TRUNC) poorly. > It is converted to multiple fuse operations. Those multiple fuse operations > often fail (for example, calling fuse_truncate_impl() while a file is also > open for write results in a "multiple writers!" exception.) > One easy way to see the problem is to run the following sequence of shell > commands: > {noformat} > ubuntu@ubu-cdh-0:~$ echo foo > /export/hdfs/tmp/a/t1.txt > ubuntu@ubu-cdh-0:~$ ls -l /export/hdfs/tmp/a > total 0 > -rw-r--r-- 1 ubuntu hadoop 4 Nov 1 15:21 t1.txt > ubuntu@ubu-cdh-0:~$ hdfs dfs -ls /tmp/a > Found 1 items > -rw-r--r-- 3 ubuntu hadoop 4 2012-11-01 15:21 /tmp/a/t1.txt > ubuntu@ubu-cdh-0:~$ echo bar > /export/hdfs/tmp/a/t1.txt > ubuntu@ubu-cdh-0:~$ ls -l /export/hdfs/tmp/a > total 0 > -rw-r--r-- 1 ubuntu hadoop 0 Nov 1 15:22 t1.txt > ubuntu@ubu-cdh-0:~$ hdfs dfs -ls /tmp/a > Found 1 items > -rw-r--r-- 3 ubuntu hadoop 0 2012-11-01 15:22 /tmp/a/t1.txt > {noformat} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira