hi, it is Hadoop 2.0.0-cdh4.1.1. the whole output is given below:
Hadoop 2.0.0-cdh4.1.1 Subversion file:///data/1/jenkins/workspace/generic-package-centos32-6/topdir/BUILD/hadoop-2.0.0-cdh4.1.1/src/hadoop-common-project/hadoop-common-r 581959ba23e4af85afd8db98b7687662fe9c5f20 On Fri, Feb 8, 2013 at 12:04 AM, Harsh J <[email protected]> wrote: > Hey Ravi, > > What version of Hadoop is this exactly? (Type and send output of > "hadoop version" if unsure) > > On Thu, Feb 7, 2013 at 11:55 PM, Ravi Chandran > <[email protected]> wrote: > > Hi, > > > > I am trying to do a name sorting using secondary sort. I have a working > > example, which I am taking as a reference. But I am getting a null > pointer > > error in the MapTask class. I am not able to locate the reason. as the > logic > > to create the Custom Object from a given file has been tested through a > java > > class.. > > I am getting this error: > > > > 13/02/07 12:23:42 WARN snappy.LoadSnappy: Snappy native library is > available > > 13/02/07 12:23:42 INFO snappy.LoadSnappy: Snappy native library loaded > > 13/02/07 12:23:42 INFO mapred.FileInputFormat: Total input paths to > process > > : 1 > > 13/02/07 12:23:43 INFO mapred.JobClient: Running job: > job_201301301056_0014 > > 13/02/07 12:23:44 INFO mapred.JobClient: map 0% reduce 0% > > 13/02/07 12:23:56 INFO mapred.JobClient: Task Id : > > attempt_201301301056_0014_m_000000_0, Status : FAILED > > java.lang.NullPointerException > > at > > org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:814) > > at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:385) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:327) > > at org.apache.hadoop.mapred.Child$4.run(Child.java:268) > > at java.security.AccessController.doPrivileged(Native Method) > > at javax.security.auth.Subject.doAs(Subject.java:396) > > at > > > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1332) > > at org.apache.hadoop.mapred.Child.main(Child.java:262) > > 13/02/07 12:23:57 INFO mapred.JobClient: Task Id : > > attempt_201301301056_0014_m_000001_0, Status : FAILED > > java.lang.NullPointerException > > at > > org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:814) > > at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:385) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:327) > > at org.apache.hadoop.mapred.Child$4.run(Child.java:268) > > at java.security.AccessController.doPrivileged(Native Method) > > at javax.security.auth.Subject.doAs(Subject.java:396) > > at > > > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1332) > > at org.apache.hadoop.mapred.Child.main(Child.java:262) > > > > I am giving the Mapper code below: > > > > import java.io.IOException; > > import org.apache.hadoop.io.LongWritable; > > import org.apache.hadoop.io.Text; > > import org.apache.hadoop.mapred.MapReduceBase; > > import org.apache.hadoop.mapred.Mapper; > > import org.apache.hadoop.mapred.OutputCollector; > > import org.apache.hadoop.mapred.Reporter; > > import org.apache.log4j.Logger; > > import com.pom.Name; > > > > public class StubMapper extends MapReduceBase implements > > Mapper<LongWritable, Text, Name, Text> { > > > > private static Logger logger = > > Logger.getLogger(StubMapper.class.getName()); > > > > StringBuffer readLine = new StringBuffer(); > > private final Name name = new Name(); > > @Override > > public void map(LongWritable key, Text value, > > OutputCollector<Name, Text> output, Reporter reporter) > > throws IOException { > > String line = value.toString(); > > String[] packer = null; > > > > packer = line.split(" "); > > > > // create the object > > if(packer.length>2) > > { > > // take everything except last name > > for (int i = 0; i < packer.length-1; i++) { > > readLine.append(packer[i]+" "); > > } > > > > name.setfName(readLine.toString()); > > name.setlName(packer[packer.length-1]); > > > > //clear the variable > > readLine.delete(0, readLine.length()); > > } > > else if(packer.length>0) > > { > > name.setfName(packer[0]); > > name.setlName(packer[1]); > > } > > > > output.collect(name, new Text(name.getlName())); > > > > } > > } > > > > I am not able to figure out the possible cause.. > > > > -- > > Thanks & Regards > > Ravi > > > > -- > Harsh J > -- Thanks & Regards Ravi
