Create jobTokenPassword file fail when run hadoop pipes locally
----------------------------------------------------------------
Key: MAPREDUCE-4000
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4000
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: pipes
Affects Versions: 0.23.3
Environment: Fedora release 16
Linux localhost.localdomain 3.2.7-1.fc16.x86_64 #1 SMP Tue Feb 21 01:40:47 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux
Apache Maven 3.0.4 (r1232337; 2012-01-17 16:44:56+0800)
Maven home: /usr/local/apache-maven-3.0.4
Java version: 1.7.0_03, vendor: Oracle Corporation
Java home: /usr/java/jdk1.7.0_03/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.2.7-1.fc16.x86_64", arch: "amd64", family: "unix"
Reporter: Changming Sun
Priority: Minor
Create jobTokenPassword file fail when run hadoop pipes locally.
I have put such settings in my job conf.
<property>
<name>mapreduce.jobtracker.address</name>
<value>local</value>
</property>
<property>
<name>mapreduce.framework.name</name>
<value>local</value>
</property>
<property>
<name>fs.defaultFS</name>
<value>file:///</value>
</property>
This job has one map task ,and one reduce task. It will fail when running
PipesReducer, because "jobTokenPassword" file is created at current working
directory,with permission 0400.
org.apache.hadoop.mapred.pipes.Application:
private void writePasswordToLocalFile(String localPasswordFile,
byte[] password, JobConf conf) throws IOException {
FileSystem localFs = FileSystem.getLocal(conf);
Path localPath = new Path(localPasswordFile);
FSDataOutputStream out = FileSystem.create(localFs, localPath,
new FsPermission("400"));
out.write(password);
out.close();
}
So, it will fail at the second time.
In such situation,the application cannot be initialized, but the
PipesReducer.close() method will be called after that ,so there will be
NullPointer Exception raise in close() method.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
