Geting exception while using DistributedCache in Hadoop - hadoop

Question

I have used below mentioned code for Distributed Caching in main class.
job.addCacheFile(new URI(args[2]));
Below mentioned code is in reduce class.
#Override
protected void setup(Reducer<LongWritable, Text, Text, Text>.Context context) throws IOException, InterruptedException {
super.setup(context);
URI[] paths = context.getCacheFiles();
if (paths.length > 0) {
loadDeliveryStatusCodes(paths[0].toString());
}
}
private void loadDeliveryStatusCodes(String file) {
String strRead;
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader("./some"));
while ((strRead = reader.readLine()) != null) {
String splitarray[] = strRead.split(",");
deliveryCodesMap.put(splitarray[0].trim(), splitarray[1].trim());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
I am getting below mentioned exception.
########/user/DeliveryStatusCodes.txt 1
java.io.FileNotFoundException: ./some (No such file or directory)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at java.io.FileInputStream.<init>(FileInputStream.java:93)
at java.io.FileReader.<init>(FileReader.java:58)
at com.hadoop.intellipaat.UserSMSDeliveryJob$USERNameSMSStatusCodeMapper.loadDeliveryStatusCodes(UserSMSDeliveryJob.java:95)
Your help will save my day.
Thanks.

Answer 1

It looks like you're missing the #some from end of your args[2].At the moment you have /user/DeliveryStatusCodes.txt, but you should have
/user/DeliveryStatusCodes.txt#some
Without it, FileReader is literally looking for ./some, which of course won't exist.
Or you can skip the alias (it's optional) and write
new FileReader("/user/DeliveryStatusCodes.txt")