hadoop2.6.0执行自带wordcount出现异常
文章来源：http://blog.csdn.net/vickyrocker1/article/details/47299391
[root@namenode hadoop-2.6.0]# bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar wordcount hdfsInput hdfsOutput
执行上述命令，结果如下
15/08/05 00:55:05 INFO Configuration.deprecation: session.id is deprecated. Instead, use dfs.metrics.session-id15/08/05 00:55:05 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker, sessionId=
15/08/05 00:55:05 INFO input.FileInputFormat: Total input paths to process : 1
15/08/05 00:55:05 INFO mapreduce.JobSubmitter: number of splits:1
15/08/05 00:55:06 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_local1009436488_0001
15/08/05 00:55:06 INFO mapreduce.Job: The url to track the job: http://localhost:8080/
15/08/05 00:55:06 INFO mapred.LocalJobRunner: OutputCommitter set in config null
15/08/05 00:55:06 INFO mapreduce.Job: Running job: job_local1009436488_0001
15/08/05 00:55:06 INFO mapred.LocalJobRunner: OutputCommitter is org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter
15/08/05 00:55:06 INFO mapred.LocalJobRunner: Waiting for map tasks
15/08/05 00:55:06 INFO mapred.LocalJobRunner: Starting task: attempt_local1009436488_0001_m_000000_0
15/08/05 00:55:06 INFO mapred.Task: Using ResourceCalculatorProcessTree : [ ]
15/08/05 00:55:06 INFO mapred.MapTask: Processing split: hdfs://namenode:9000/user/root/hdfsInput/test:0+45
15/08/05 00:55:06 INFO mapred.MapTask: (EQUATOR) 0 kvi 2621436(10485744)
15/08/05 00:55:06 INFO mapred.MapTask: mapreduce.task.io.sort.mb: 10
15/08/05 00:55:06 INFO mapred.MapTask: soft limit at 8388608
15/08/05 00:55:06 INFO mapred.MapTask: bufstart = 0; bufvoid = 10485760
15/08/05 00:55:06 INFO mapred.MapTask: kvstart = 2621436; length = 655360
15/08/05 00:55:06 INFO mapred.MapTask: Map output collector class = org.apache.hadoop.mapred.MapTask$MapOutputBuffer
15/08/05 00:55:07 INFO mapred.LocalJobRunner:
15/08/05 00:55:07 INFO mapred.MapTask: Starting flush of map output
15/08/05 00:55:07 INFO mapred.MapTask: Spilling map output
15/08/05 00:55:07 INFO mapred.MapTask: bufstart = 0; bufend = 97; bufvoid = 10485760
15/08/05 00:55:07 INFO mapred.MapTask: kvstart = 2621436(10485744); kvend = 2621388(10485552); length = 49/655360
15/08/05 00:55:07 INFO mapred.MapTask: Finished spill 0
15/08/05 00:55:07 INFO mapred.Task: Task:attempt_local1009436488_0001_m_000000_0 is done. And is in the process of committing
15/08/05 00:55:07 INFO mapred.LocalJobRunner: map
15/08/05 00:55:07 INFO mapred.Task: Task 'attempt_local1009436488_0001_m_000000_0' done.
15/08/05 00:55:07 INFO mapred.LocalJobRunner: Finishing task: attempt_local1009436488_0001_m_000000_0
15/08/05 00:55:07 INFO mapred.LocalJobRunner: map task executor complete.
15/08/05 00:55:07 INFO mapred.LocalJobRunner: Waiting for reduce tasks
15/08/05 00:55:07 INFO mapred.LocalJobRunner: Starting task: attempt_local1009436488_0001_r_000000_0
15/08/05 00:55:07 INFO mapred.Task: Using ResourceCalculatorProcessTree : [ ]
15/08/05 00:55:07 INFO mapred.ReduceTask: Using ShuffleConsumerPlugin: org.apache.hadoop.mapreduce.task.reduce.Shuffle@4d22c8ff
15/08/05 00:55:07 INFO reduce.MergeManagerImpl: MergerManager: memoryLimit=5189795, maxSingleShuffleLimit=1297448, mergeThreshold=51897, ioSortFactor=20, memToMemMergeOutputsThreshold=20
15/08/05 00:55:07 INFO mapred.LocalJobRunner: reduce task executor complete.
15/08/05 00:55:07 WARN mapred.LocalJobRunner: job_local1009436488_0001
java.lang.Exception: java.lang.RuntimeException: Invalid configuration: maxSingleShuffleLimit should be less than mergeThresholdmaxSingleShuffleLimit: 1297448mergeThreshold: 51897
at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:529)
Caused by: java.lang.RuntimeException: Invalid configuration: maxSingleShuffleLimit should be less than mergeThresholdmaxSingleShuffleLimit: 1297448mergeThreshold: 51897
at org.apache.hadoop.mapreduce.task.reduce.MergeManagerImpl.<init>(MergeManagerImpl.java:203)
at org.apache.hadoop.mapreduce.task.reduce.Shuffle.createMergeManager(Shuffle.java:85)
at org.apache.hadoop.mapreduce.task.reduce.Shuffle.init(Shuffle.java:80)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:374)
at org.apache.hadoop.mapred.LocalJobRunner$Job$ReduceTaskRunnable.run(LocalJobRunner.java:319)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
15/08/05 00:55:07 INFO mapreduce.Job: Job job_local1009436488_0001 running in uber mode : false
15/08/05 00:55:07 INFO mapreduce.Job: map 100% reduce 0%
15/08/05 00:55:07 INFO mapreduce.Job: Job job_local1009436488_0001 failed with state FAILED due to: NA
15/08/05 00:55:07 INFO mapreduce.Job: Counters: 26
File System Counters
FILE: Number of bytes read=269453
FILE: Number of bytes written=521887
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=45
HDFS: Number of bytes written=0
HDFS: Number of read operations=6
HDFS: Number of large read operations=0
HDFS: Number of write operations=1
Map-Reduce Framework
Map input records=1
Map output records=13
Map output bytes=97
Map output materialized bytes=82
Input split bytes=110
Combine input records=13
Combine output records=8
Spilled Records=8
Failed Shuffles=0
Merged Map outputs=0
GC time elapsed (ms)=2
CPU time spent (ms)=0
Physical memory (bytes) snapshot=0
Virtual memory (bytes) snapshot=0
Total committed heap usage (bytes)=29556736
File Input Format Counters
Bytes Read=45
后经过脱离安全模式，发现运行无误[root@namenode hadoop-2.6.0]# bin/hadoop dfsadmin -safemode leave
[root@namenode hadoop-2.6.0]# bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar wordcount hdfsInput hdfsOutput
15/08/05 01:21:38 INFO client.RMProxy: Connecting to ResourceManager at namenode/192.68.4.185:8032
15/08/05 01:21:39 INFO input.FileInputFormat: Total input paths to process : 1
15/08/05 01:21:39 INFO mapreduce.JobSubmitter: number of splits:1
15/08/05 01:21:40 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1438762610458_0001
15/08/05 01:21:40 INFO impl.YarnClientImpl: Submitted application application_1438762610458_0001
15/08/05 01:21:41 INFO mapreduce.Job: The url to track the job: http://namenode:8088/proxy/application_1438762610458_0001/
15/08/05 01:21:41 INFO mapreduce.Job: Running job: job_1438762610458_0001
15/08/05 01:21:53 INFO mapreduce.Job: Job job_1438762610458_0001 running in uber mode : false
15/08/05 01:21:53 INFO mapreduce.Job: map 0% reduce 0%
15/08/05 01:22:08 INFO mapreduce.Job: map 100% reduce 0%
15/08/05 01:22:23 INFO mapreduce.Job: map 100% reduce 100%
15/08/05 01:22:23 INFO mapreduce.Job: Job job_1438762610458_0001 completed successfully
15/08/05 01:22:24 INFO mapreduce.Job: Counters: 49
File System Counters
FILE: Number of bytes read=82
FILE: Number of bytes written=210925
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=155
HDFS: Number of bytes written=44
HDFS: Number of read operations=6
HDFS: Number of large read operations=0
HDFS: Number of write operations=2
Job Counters
Launched map tasks=1
Launched reduce tasks=1
Data-local map tasks=1
Total time spent by all maps in occupied slots (ms)=12350
Total time spent by all reduces in occupied slots (ms)=13065
Total time spent by all map tasks (ms)=12350
Total time spent by all reduce tasks (ms)=13065
Total vcore-seconds taken by all map tasks=12350
Total vcore-seconds taken by all reduce tasks=13065
Total megabyte-seconds taken by all map tasks=12646400
Total megabyte-seconds taken by all reduce tasks=13378560
Map-Reduce Framework
Map input records=1
Map output records=13
Map output bytes=97
Map output materialized bytes=82
Input split bytes=110
Combine input records=13
Combine output records=8
Reduce input groups=8
Reduce shuffle bytes=82
Reduce input records=8
Reduce output records=8
Spilled Records=16
Shuffled Maps =1
Failed Shuffles=0
Merged Map outputs=1
GC time elapsed (ms)=212
CPU time spent (ms)=3560
Physical memory (bytes) snapshot=309587968
Virtual memory (bytes) snapshot=1687298048
Total committed heap usage (bytes)=164040704
Shuffle Errors
BAD_ID=0
CONNECTION=0
IO_ERROR=0
WRONG_LENGTH=0
WRONG_MAP=0
WRONG_REDUCE=0
File Input Format Counters
Bytes Read=45
File Output Format Counters
Bytes Written=44