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Posted to common-issues@hadoop.apache.org by "Fabian Zimmermann (JIRA)" <ji...@apache.org> on 2013/09/30 10:20:23 UTC
[jira] [Created] (HADOOP-10007) distcp / mv is not working on ftp
Fabian Zimmermann created HADOOP-10007:
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Summary: distcp / mv is not working on ftp
Key: HADOOP-10007
URL: https://issues.apache.org/jira/browse/HADOOP-10007
Project: Hadoop Common
Issue Type: Bug
Components: fs
Environment: Ubuntu 12.04.2 LTS
Hadoop 2.0.0-cdh4.2.1
Subversion file:///var/lib/jenkins/workspace/generic-package-ubuntu64-12-04/CDH4.2.1-Packaging-Hadoop-2013-04-22_09-50-19/hadoop-2.0.0+960-1.cdh4.2.1.p0.9~precise/src/hadoop-common-project/hadoop-common -r 144bd548d481c2774fab2bec2ac2645d190f705b
Compiled by jenkins on Mon Apr 22 10:26:30 PDT 2013
>From source with checksum aef88defdddfb22327a107fbd7063395
Reporter: Fabian Zimmermann
i'm just trying to backup some files to our ftp-server.
hadoop distcp hdfs:///data/ ftp://user:pass@server/data/
returns after some minutes with:
Task TASKID="task_201308231529_97700_m_000002" TASK_TYPE="MAP" TASK_STATUS="FAILED" FINISH_TIME="1380217916479" ERROR="java\.io\.IOException: Cannot rename parent(source): ftp://x:x@backup2/data/, parent(destination): ftp://x:x@backup2/data/
at org\.apache\.hadoop\.fs\.ftp\.FTPFileSystem\.rename(FTPFileSystem\.java:557)
at org\.apache\.hadoop\.fs\.ftp\.FTPFileSystem\.rename(FTPFileSystem\.java:522)
at org\.apache\.hadoop\.mapred\.FileOutputCommitter\.moveTaskOutputs(FileOutputCommitter\.java:154)
at org\.apache\.hadoop\.mapred\.FileOutputCommitter\.moveTaskOutputs(FileOutputCommitter\.java:172)
at org\.apache\.hadoop\.mapred\.FileOutputCommitter\.commitTask(FileOutputCommitter\.java:132)
at org\.apache\.hadoop\.mapred\.OutputCommitter\.commitTask(OutputCommitter\.java:221)
at org\.apache\.hadoop\.mapred\.Task\.commit(Task\.java:1000)
at org\.apache\.hadoop\.mapred\.Task\.done(Task\.java:870)
at org\.apache\.hadoop\.mapred\.MapTask\.run(MapTask\.java:329)
at org\.apache\.hadoop\.mapred\.Child$4\.run" TASK_ATTEMPT_ID="" .
I googled a bit and added
fs.ftp.host = backup2
fs.ftp.user.backup2 = user
fs.ftp.password.backup2 = password
to core-site.xml, then I was able to execute:
hadoop fs -ls ftp:///data/
hadoop fs -rm ftp:///data/test.file
but as soon as I try
hadoop fs -mv file:///data/test.file ftp:///data/test2.file
mv: `ftp:///data/test.file': Input/output error
I enabled debug-logging in our ftp-server and got:
Sep 27 15:24:33 backup2 ftpd[38241]: command: LIST /data
Sep 27 15:24:33 backup2 ftpd[38241]: <--- 150
Sep 27 15:24:33 backup2 ftpd[38241]: Opening BINARY mode data connection for '/bin/ls'.
Sep 27 15:24:33 backup2 ftpd[38241]: <--- 226
Sep 27 15:24:33 backup2 ftpd[38241]: Transfer complete.
Sep 27 15:24:33 backup2 ftpd[38241]: command: CWD ftp:/data
Sep 27 15:24:33 backup2 ftpd[38241]: <--- 550
Sep 27 15:24:33 backup2 ftpd[38241]: ftp:/data: No such file or directory.
Sep 27 15:24:33 backup2 ftpd[38241]: command: RNFR test.file
Sep 27 15:24:33 backup2 ftpd[38241]: <--- 550
looks like the generation of "CWD" is buggy, hadoop tries to cd into "ftp:/data", but should use "/data"
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