Pig-0.16.0 на Hadoop 2.7.2 - ОШИБКА 1002: невозможно сохранить псевдоним

Question

Я только что начал с обучения Pig, для которого я установил псевдораспространенный Hadoop 2.7.2 на Ubuntu 14.04 LTS с версией Pig версии 0.16.0. Ниже приведены мои конфигурации для PIG и Hadoop -

Файл: .bashrc

#=============================================================== 
# Hadoop Variable List 

export JAVA_HOME=/usr/lib/jvm/java-9-oracle 
export HADOOP_INSTALL=/home/hadoop/hadoop 
export PATH=$PATH:$HADOOP_INSTALL/bin 
export PATH=$PATH:$HADOOP_INSTALL/sbin 
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL 
export HADOOP_COMMON_HOME=$HADOOP_INSTALL 
export HADOOP_HDFS_HOME=$HADOOP_INSTALL 
export HADOOP_HOME=$HADOOP_INSTALL 
export YARN_HOME=$HADOOP_INSTALL 
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native 
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib/native" 

#=============================================================== 
# PIG variable 
export PIG_HOME="/home/hadoop/pig" 
export PIG_INSTALL="$PIG_HOME" 
export PIG_CONF_DIR="$PIG_HOME/conf" 
export PIG_CLASSPATH="$HADOOP_INSTALL/conf" 
export HADOOPDIR="$HADOOP_INSTALL/conf" 
export PATH="$PIG_HOME/bin:$PATH" 

=======================

и после это каталог, из которого я свинья выполнения

-rw-rw-r-- 1 hadoop hadoop 540117 Jul 15 12:41 myfile.txt 
hadoop@rajeev:~$ pwd 
/home/hadoop 

Я скопировал этот файл в HDFS слишком

hadoop@rajeev:~$ hadoop fs -ls -R /user/hadoop 
-rw-r--r-- 1 hadoop supergroup  540117 2016-07-15 12:48 /user/hadoop/myfile.txt 

Теперь ... когда я выполняю следующие команды в оболочке Grunt, он дает ошибку!

grunt> a = load 'myfile.txt' as line; 
grunt> store a into 'c.out'; 

2016-07-15 12:56:38,670 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Processing aliases a 
2016-07-15 12:56:38,670 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - detailed locations: M: a[1,4],a[-1,-1] C: R: 
2016-07-15 12:56:38,684 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 0% complete 
2016-07-15 12:56:38,685 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Running jobs are [job_1468556821972_0006] 
2016-07-15 12:56:53,959 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 50% complete 
2016-07-15 12:56:53,959 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Running jobs are [job_1468556821972_0006] 
2016-07-15 12:57:25,722 [main] WARN org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Ooops! Some job has failed! Specify -stop_on_failure if you want Pig to stop immediately on failure. 
2016-07-15 12:57:25,722 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - job job_1468556821972_0006 has failed! Stop running all dependent jobs 
2016-07-15 12:57:25,722 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 100% complete 
2016-07-15 12:57:25,726 [main] INFO org.apache.hadoop.yarn.client.RMProxy - Connecting to ResourceManager at /0.0.0.0:8032 
2016-07-15 12:57:25,786 [main] INFO org.apache.hadoop.yarn.client.RMProxy - Connecting to ResourceManager at /0.0.0.0:8032 
2016-07-15 12:57:25,839 [main] ERROR org.apache.pig.tools.pigstats.mapreduce.MRPigStatsUtil - 1 map reduce job(s) failed! 
2016-07-15 12:57:25,841 [main] INFO org.apache.pig.tools.pigstats.mapreduce.SimplePigStats - Script Statistics: 

HadoopVersion PigVersion UserId StartedAt FinishedAt Features 
2.7.2 0.16.0 hadoop 2016-07-15 12:56:36 2016-07-15 12:57:25 UNKNOWN 

Failed! 

Failed Jobs: 
JobId Alias Feature Message Outputs 
job_1468556821972_0006 a MAP_ONLY Message: Job failed!  hdfs://localhost:9001/user/hadoop/c.out, 

Input(s): 
Failed to read data from "hdfs://localhost:9001/user/hadoop/myfile.txt" 

Output(s): 
Failed to produce result in "hdfs://localhost:9001/user/hadoop/c.out" 

Counters: 
Total records written : 0 
Total bytes written : 0 
Spillable Memory Manager spill count : 0 
Total bags proactively spilled: 0 
Total records proactively spilled: 0 

Job DAG: 
job_1468556821972_0006 


2016-07-15 12:57:25,842 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Failed! 

Я попытался ее решения с помощью других средств, просто выполняя PIG в локальном режиме, а не в режиме MapReduce, но ничего, кажется, работает. Каждый раз, когда эти простые две команды терпят неудачу.

файл журнала ошибок печатает следующее сообщение

2016-07-15 12:56:38,670 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Processing aliases a 
2016-07-15 12:56:38,670 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - detailed locations: M: a[1,4],a[-1,-1] C: R: 
2016-07-15 12:56:38,684 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 0% complete 
2016-07-15 12:56:38,685 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Running jobs are [job_1468556821972_0006] 
2016-07-15 12:56:53,959 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 50% complete 
2016-07-15 12:56:53,959 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Running jobs are [job_1468556821972_0006] 
2016-07-15 12:57:25,722 [main] WARN org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Ooops! Some job has failed! Specify -stop_on_failure if you want Pig to stop immediately on failure. 
2016-07-15 12:57:25,722 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - job job_1468556821972_0006 has failed! Stop running all dependent jobs 
2016-07-15 12:57:25,722 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 100% complete 
2016-07-15 12:57:25,726 [main] INFO org.apache.hadoop.yarn.client.RMProxy - Connecting to ResourceManager at /0.0.0.0:8032 
2016-07-15 12:57:25,786 [main] INFO org.apache.hadoop.yarn.client.RMProxy - Connecting to ResourceManager at /0.0.0.0:8032 
2016-07-15 12:57:25,839 [main] ERROR org.apache.pig.tools.pigstats.mapreduce.MRPigStatsUtil - 1 map reduce job(s) failed! 
2016-07-15 12:57:25,841 [main] INFO org.apache.pig.tools.pigstats.mapreduce.SimplePigStats - Script Statistics: 

HadoopVersion PigVersion UserId StartedAt FinishedAt Features 
2.7.2 0.16.0 hadoop 2016-07-15 12:56:36 2016-07-15 12:57:25 UNKNOWN 

Failed! 

Failed Jobs: 
JobId Alias Feature Message Outputs 
job_1468556821972_0006 a MAP_ONLY Message: Job failed!  hdfs://localhost:9001/user/hadoop/c.out, 

Input(s): 
Failed to read data from "hdfs://localhost:9001/user/hadoop/myfile.txt" 

Output(s): 
Failed to produce result in "hdfs://localhost:9001/user/hadoop/c.out" 

Counters: 
Total records written : 0 
Total bytes written : 0 
Spillable Memory Manager spill count : 0 
Total bags proactively spilled: 0 
Total records proactively spilled: 0 

Job DAG: 
job_1468556821972_0006 


2016-07-15 12:57:25,842 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Failed! 

Запрос ваша помощь!

Answer 1

Укажите полный путь и тип данных для поля, в которое вы загружаете.

a = load 'hdfs://localhost:9001/user/hadoop/myfile.txt' AS (line:chararray); 
store a into 'hdfs://localhost:9001/user/hadoop/c.out';