hadoop - Hadoop 2.7.2上的Pig-0.16.0-错误1002:无法存储别名

Question

我刚刚开始使用Pig学习，为此我在使用Pig版本0.16.0的Ubuntu 14.04 LTS上安装了伪分布式Hadoop 2.7.2。以下是我对PIG和Hadoop的配置-

文件:.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"

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

以下是我执行Pig的目录

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

我也将此文件复制到HDFS

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

现在...当我在Grunt shell中执行以下命令时，它会出错!

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!

我尝试通过其他方式解决该问题，方法是仅在本地模式下而不是在MapReduce模式下执行PIG，但似乎没有任何效果。每当这两个简单的命令失败时。

错误日志文件显示以下消息

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!

请求您的帮助!

Answer 1

指定要加载到的字段的完整路径和数据类型。

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