HDFS has file but java.io.FileNotFoundException happens - hadoop

Question

I am running MapReduce program on Hadoop.
The inputformat passes each file path to mapper.
I can check the file through cmd like this,
$ hadoop fs -ls hdfs://slave1.kdars.com:8020/user/hadoop/num_5/13.pdf
Found 1 items -rwxrwxrwx 3 hdfs hdfs 184269 2015-03-31 22:50 hdfs://slave1.kdars.com:8020/user/hadoop/num_5/13.pdf
However when I try to open that file from the mapper side, it is not working.
15/04/01 06:13:04 INFO mapreduce.Job: Task Id : attempt_1427882384950_0025_m_000002_2, Status : FAILED
Error: java.io.FileNotFoundException: hdfs:/slave1.kdars.com:8020/user/hadoop/num_5/13.pdf (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.io.FileInputStream.<init>(FileInputStream.java:101)
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1111)
I checked that inputformat work fine and mapper have got right file path.
mapper code look like this,
#Override
public void map(Text title, Text file, Context context) throws IOException, InterruptedException {
long time = System.currentTimeMillis();
SimpleDateFormat dayTime = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
String str = dayTime.format(new Date(time));
File temp = new File(file.toString());
if(temp.exists()){
DBManager.getInstance().insertSQL("insert into `plagiarismdb`.`workflow` (`type`) value ('"+temp+" is exists')");
}else{
DBManager.getInstance().insertSQL("insert into `plagiarismdb`.`workflow` (`type`) value ('"+temp+" is not exists')");
}
}
Help me please.

Answer 1

First, import these.
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
Then, use them in your mapper method.
FileSystem fs = FileSystem.get(new Configuration());
Path path= new Path(value.toString());
System.out.println(path);
if (fs.exists(path)) {
context.write(value, one);
} else {
context.write(value, zero);
}