A couple of observations and a few recommendations. First, if you are trying to run the pig script from the linux command line, I would recommend you save your pig script locally and then run it. Also, you don't really need to fully qualify the location of the input file like you are doing above. Here is a walk through of something like you are doing now; all from the command line.
SSH to the Sandbox and become maria_dev. I have an earlier 2.4 version and it does not have a local maria_dev user account (she does have an account in Ambari as well as a HDFS home directory) so I had to create that first as shown below. If the first "su" command works then skip the "useradd" command. Then verify she has a HDFS home directory.
HW10653-2:~ lmartin$ ssh root@127.0.0.1 -p 2222
root@127.0.0.1's password:
Last login: Tue Mar 15 22:14:09 2016 from 10.0.2.2
[root@sandbox ~]# su maria_dev
su: user maria_dev does not exist
[root@sandbox ~]# useradd -m -s /bin/bash maria_dev
[root@sandbox ~]# su - maria_dev
[maria_dev@sandbox ~]$ hdfs dfs -ls /user
Found 17 items <<NOTE: I deleted all except the one I was looking for...
drwxr-xr-x - maria_dev hdfs 0 2016-03-14 22:49 /user/maria_dev
Then copy a file to HDFS that you can then later read.
[maria_dev@sandbox ~]$ hdfs dfs -put /etc/hosts hosts.txt
[maria_dev@sandbox ~]$ hdfs dfs -cat /user/maria_dev/hosts.txt
# File is generated from /usr/lib/hue/tools/start_scripts/gen_hosts.sh
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1localhost.localdomain localhost
10.0.2.15sandbox.hortonworks.com sandbox ambari.hortonworks.com
Now put the following two lines of code into a LOCAL file called runme.pig as shown when listing it below.
[maria_dev@sandbox ~]$ pwd
/home/maria_dev
[maria_dev@sandbox ~]$ cat runme.pig
data = LOAD '/user/maria_dev/hosts.txt';
DUMP data;
Then just run it (remember, no dashes!!). NOTE: many lines removed from the logging output that is bundled in with the DUMP of the hosts.txt file.
[maria_dev@sandbox ~]$ pig runme.pig
... REMOVED A BUNCH OF LOGGING MESSAGES ...
2016-03-17 22:38:45,636 [main] INFO org.apache.pig.tools.pigstats.mapreduce.SimplePigStats - Script Statistics:
HadoopVersionPigVersionUserIdStartedAtFinishedAtFeatures
2.7.1.2.4.0.0-1690.15.0.2.4.0.0-169maria_dev2016-03-17 22:38:102016-03-17 22:38:45UNKNOWN
Success!
Job Stats (time in seconds):
JobIdMapsReducesMaxMapTimeMinMapTimeAvgMapTimeMedianMapTimeMaxReduceTimeMinReduceTimeAvgReduceTimeMedianReducetimeAliasFeatureOutputs
job_1458253459880_00011077770dataMAP_ONLYhdfs://sandbox.hortonworks.com:8020/tmp/temp212662320/tmp-490136848,
Input(s):
Successfully read 5 records (670 bytes) from: "/user/maria_dev/hosts.txt"
Output(s):
Successfully stored 5 records (310 bytes) in: "hdfs://sandbox.hortonworks.com:8020/tmp/temp212662320/tmp-490136848"
Counters:
Total records written : 5
Total bytes written : 310
Spillable Memory Manager spill count : 0
Total bags proactively spilled: 0
Total records proactively spilled: 0
Job DAG:
job_1458253459880_0001
... REMOVED ABOUT 10 MORE LOGGING MESSAGES ...
.... THE NEXT BIT IS THE RESULTS OF THE DUMP COMMAND ....
(# File is generated from /usr/lib/hue/tools/start_scripts/gen_hosts.sh)
(# Do not remove the following line, or various programs)
(# that require network functionality will fail.)
(127.0.0.1,,localhost.localdomain localhost)
(10.0.2.15,sandbox.hortonworks.com sandbox ambari.hortonworks.com)
2016-03-17 22:38:46,662 [main] INFO org.apache.pig.Main - Pig script completed in 43 seconds and 385 milliseconds (43385 ms)
[maria_dev@sandbox ~]$ Does this work for you?? If so, the you can run a Pig script from the CLI and remember... you do NOT need all the fully qualified naming junk if running this way. GOOD LUCK!
