帮我解决以下Hadoop错误：
我想运行一个MRJob Python模块mrjob_word_count.py，该模块仅对文本文件my_text.txt中的单词进行计数：
以下是mrjob_word_count.py程序：
#!/usr/bin/python2.7
from mrjob.job import MRJob
class MRWordFrequencyCount(MRJob):
def mapper(self, _, line):
yield "chars", len(line)
yield "words", len(line.split())
yield "lines", 1
def reducer(self, key, values):
yield key, sum(values)
if __name__ == '__main__':
MRWordFrequencyCount.run()
当我简单地跑步时：
python2.7 /home/cloudera/Documents/mrjob_word_count.py /home/cloudera/Documents/my_text.txt
我得到以下预期结果：
No configs found; falling back on auto-configuration
No configs specified for inline runner
Running step 1 of 1...
Creating temp directory /tmp/mrjob_word_count.cloudera.20181114.215028.951225
job output is in /tmp/mrjob_word_count.cloudera.20181114.215028.951225/output
Streaming final output from /tmp/mrjob_word_count.cloudera.20181114.215028.951225/output...
"chars" 786
"words" 125
"lines" 1
Removing temp directory /tmp/mrjob_word_count.cloudera.20181114.215028.951225...
但是当我随后尝试在Virtual Box的hadoop Cloudera Quickstart上运行相同命令时，出现错误。请注意，我没有选中hdfs权限检查。因此，我不确定这是否仍然是权限错误：
在hadoop上运行的命令：
python2.7 /home/cloudera/Documents/mrjob_word_count.py -r hadoop hdfs:///user/root/my_input2/my_text.txt
错误：
No configs found; falling back on auto-configuration
No configs specified for hadoop runner
Looking for hadoop binary in $PATH...
Found hadoop binary: /usr/bin/hadoop
Using Hadoop version 2.6.0
Looking for Hadoop streaming jar in /home/hadoop/contrib...
Looking for Hadoop streaming jar in /usr/lib/hadoop-mapreduce...
Found Hadoop streaming jar: /usr/lib/hadoop-mapreduce/hadoop-streaming.jar
Creating temp directory /tmp/mrjob_word_count.cloudera.20181114.213237.845998
Copying local files to hdfs:///user/cloudera/tmp/mrjob/mrjob_word_count.cloudera.20181114.213237.845998/files/...
Running step 1 of 1...
packageJobJar: [] [/usr/lib/hadoop-mapreduce/hadoop-streaming-2.6.0-cdh5.15.1.jar] /tmp/streamjob7897542047673680590.jar tmpDir=null
Connecting to ResourceManager at quickstart.cloudera/10.0.2.15:8032
Connecting to ResourceManager at quickstart.cloudera/10.0.2.15:8032
Total input paths to process : 1
number of splits:2
Submitting tokens for job: job_1542225023300_0003
Submitted application application_1542225023300_0003
The url to track the job: http://quickstart.cloudera:8088/proxy/application_1542225023300_0003/
Running job: job_1542225023300_0003
Job job_1542225023300_0003 running in uber mode : false
map 0% reduce 0%
Task Id : attempt_1542225023300_0003_m_000001_0, Status : FAILED
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Task Id : attempt_1542225023300_0003_m_000000_0, Status : FAILED
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Task Id : attempt_1542225023300_0003_m_000000_1, Status : FAILED
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Task Id : attempt_1542225023300_0003_m_000001_1, Status : FAILED
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Task Id : attempt_1542225023300_0003_m_000000_2, Status : FAILED
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Task Id : attempt_1542225023300_0003_m_000001_2, Status : FAILED
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
map 100% reduce 100%
Job job_1542225023300_0003 failed with state FAILED due to: Task failed task_1542225023300_0003_m_000001
Job failed as tasks failed. failedMaps:1 failedReduces:0
Job not successful!
Streaming Command Failed!
Counters: 10
Job Counters
Data-local map tasks=2
Failed map tasks=8
Killed reduce tasks=1
Launched map tasks=8
Other local map tasks=6
Total megabyte-milliseconds taken by all map tasks=32033792
Total time spent by all map tasks (ms)=62566
Total time spent by all maps in occupied slots (ms)=32033792
Total time spent by all reduces in occupied slots (ms)=0
Total vcore-milliseconds taken by all map tasks=62566
Scanning logs for probable cause of failure...
Looking for history log in hdfs:///tmp/hadoop-yarn/staging...
Looking for history log in /var/log/hadoop-yarn...
Probable cause of failure:
Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:538)
at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:130)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:34)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:459)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Step 1 of 1 failed: Command '['/usr/bin/hadoop', 'jar', '/usr/lib/hadoop-mapreduce/hadoop-streaming.jar', '-files', 'hdfs:///user/cloudera/tmp/mrjob/mrjob_word_count.cloudera.20181114.213237.845998/files/mrjob.zip#mrjob.zip,hdfs:///user/cloudera/tmp/mrjob/mrjob_word_count.cloudera.20181114.213237.845998/files/mrjob_word_count.py#mrjob_word_count.py,hdfs:///user/cloudera/tmp/mrjob/mrjob_word_count.cloudera.20181114.213237.845998/files/setup-wrapper.sh#setup-wrapper.sh', '-input', 'hdfs:///user/root/my_input2/my_text.txt', '-output', 'hdfs:///user/cloudera/tmp/mrjob/mrjob_word_count.cloudera.20181114.213237.845998/output', '-mapper', 'sh -ex setup-wrapper.sh python mrjob_word_count.py --step-num=0 --mapper', '-reducer', 'sh -ex setup-wrapper.sh python mrjob_word_count.py --step-num=0 --reducer']' returned non-zero exit status 256