我正在尝试在hadoop上执行map reduce程序。 当我在Macbook上提交jar并在桌面上运行作业时，作业失败，容器超出虚拟内存限制。但是 http://master-hadoop:8088/cluster告诉我，我的工作成功，结果似乎是正确的。
您可以看到所使用的物理内存大小为170MB，而使用的虚拟内存大小为17.8GB。并且输入的文件只有10MB。
我无法弄清楚的是，为什么程序使用了这么多的虚拟内存，为什么hadoop说我的工作成功了，所以结果可能是因为容器被杀了。
16/11/07 21:31:40 INFO Join: 20161107213140620
16/11/07 21:31:41 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
16/11/07 21:31:42 INFO client.RMProxy: Connecting to ResourceManager at master-hadoop/192.168.199.162:8032
16/11/07 21:31:43 WARN mapreduce.JobResourceUploader: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
16/11/07 21:31:44 INFO input.FileInputFormat: Total input paths to process : 2
16/11/07 21:31:44 INFO mapreduce.JobSubmitter: number of splits:2
16/11/07 21:31:44 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1478524274348_0001
16/11/07 21:31:46 INFO impl.YarnClientImpl: Submitted application application_1478524274348_0001
16/11/07 21:31:46 INFO mapreduce.Job: The url to track the job: http://master-hadoop:8088/proxy/application_1478524274348_0001/
16/11/07 21:31:46 INFO mapreduce.Job: Running job: job_1478524274348_0001
16/11/07 21:31:55 INFO mapreduce.Job: Job job_1478524274348_0001 running in uber mode : false
16/11/07 21:31:55 INFO mapreduce.Job: map 0% reduce 0%
16/11/07 21:32:04 INFO mapreduce.Job: map 100% reduce 0%
16/11/07 21:32:11 INFO mapreduce.Job: map 100% reduce 100%
16/11/07 21:32:12 INFO mapreduce.Job: Job job_1478524274348_0001 completed successfully
16/11/07 21:32:12 INFO mapreduce.Job: Counters: 49
File System Counters
FILE: Number of bytes read=1974092
FILE: Number of bytes written=4301313
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=20971727
HDFS: Number of bytes written=23746
HDFS: Number of read operations=9
HDFS: Number of large read operations=0
HDFS: Number of write operations=2
Job Counters
Launched map tasks=2
Launched reduce tasks=1
Data-local map tasks=2
Total time spent by all maps in occupied slots (ms)=13291
Total time spent by all reduces in occupied slots (ms)=3985
Total time spent by all map tasks (ms)=13291
Total time spent by all reduce tasks (ms)=3985
Total vcore-milliseconds taken by all map tasks=13291
Total vcore-milliseconds taken by all reduce tasks=3985
Total megabyte-milliseconds taken by all map tasks=13609984
Total megabyte-milliseconds taken by all reduce tasks=4080640
Map-Reduce Framework
Map input records=162852
Map output records=162852
Map output bytes=1648382
Map output materialized bytes=1974098
Input split bytes=207
Combine input records=0
Combine output records=0
Reduce input groups=105348
Reduce shuffle bytes=1974098
Reduce input records=162852
Reduce output records=4423
Spilled Records=325704
Shuffled Maps =2
Failed Shuffles=0
Merged Map outputs=2
GC time elapsed (ms)=364
CPU time spent (ms)=6300
Physical memory (bytes) snapshot=705949696
Virtual memory (bytes) snapshot=5738041344
Total committed heap usage (bytes)=492830720
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=20971520
File Output Format Counters
Bytes Written=23746
16/11/07 21:32:12 INFO client.RMProxy: Connecting to ResourceManager at master-hadoop/192.168.199.162:8032
16/11/07 21:32:12 WARN mapreduce.JobResourceUploader: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
16/11/07 21:32:12 INFO input.FileInputFormat: Total input paths to process : 2
16/11/07 21:32:12 INFO mapreduce.JobSubmitter: number of splits:2
16/11/07 21:32:13 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1478524274348_0002
16/11/07 21:32:13 INFO impl.YarnClientImpl: Submitted application application_1478524274348_0002
16/11/07 21:32:13 INFO mapreduce.Job: The url to track the job: http://master-hadoop:8088/proxy/application_1478524274348_0002/
16/11/07 21:32:13 INFO mapreduce.Job: Running job: job_1478524274348_0002
16/11/07 21:32:24 INFO mapreduce.Job: Job job_1478524274348_0002 running in uber mode : false
16/11/07 21:32:24 INFO mapreduce.Job: map 0% reduce 0%
16/11/07 21:32:32 INFO mapreduce.Job: map 100% reduce 0%
16/11/07 21:32:38 INFO mapreduce.Job: Task Id : attempt_1478524274348_0002_r_000000_0, Status : FAILED
Container [pid=4170,containerID=container_1478524274348_0002_01_000004] is running beyond virtual memory limits. Current usage: 170.0 MB of 1 GB physical memory used; 17.8 GB of 2.1 GB virtual memory used. Killing container.
Dump of the process-tree for container_1478524274348_0002_01_000004 :
|- PID PPID PGRPID SESSID CMD_NAME USER_MODE_TIME(MILLIS) SYSTEM_TIME(MILLIS) VMEM_USAGE(BYTES) RSSMEM_USAGE(PAGES) FULL_CMD_LINE
|- 4174 4170 4170 4170 (java) 407 30 19121176576 42828 /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Djava.net.preferIPv4Stack=true -Dhadoop.metrics.log.level=WARN -Xmx200m -Djava.io.tmpdir=/usr/local/hadoop/tmp/nm-local-dir/usercache/lining/appcache/application_1478524274348_0002/container_1478524274348_0002_01_000004/tmp -Dlog4j.configuration=container-log4j.properties -Dyarn.app.container.log.dir=/usr/local/hadoop/logs/userlogs/application_1478524274348_0002/container_1478524274348_0002_01_000004 -Dyarn.app.container.log.filesize=0 -Dhadoop.root.logger=INFO,CLA -Dhadoop.root.logfile=syslog -Dyarn.app.mapreduce.shuffle.logger=INFO,shuffleCLA -Dyarn.app.mapreduce.shuffle.logfile=syslog.shuffle -Dyarn.app.mapreduce.shuffle.log.filesize=0 -Dyarn.app.mapreduce.shuffle.log.backups=0 org.apache.hadoop.mapred.YarnChild 127.0.1.1 33077 attempt_1478524274348_0002_r_000000_0 4
|- 4170 4168 4170 4170 (bash) 0 0 17051648 700 /bin/bash -c /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Djava.net.preferIPv4Stack=true -Dhadoop.metrics.log.level=WARN -Xmx200m -Djava.io.tmpdir=/usr/local/hadoop/tmp/nm-local-dir/usercache/lining/appcache/application_1478524274348_0002/container_1478524274348_0002_01_000004/tmp -Dlog4j.configuration=container-log4j.properties -Dyarn.app.container.log.dir=/usr/local/hadoop/logs/userlogs/application_1478524274348_0002/container_1478524274348_0002_01_000004 -Dyarn.app.container.log.filesize=0 -Dhadoop.root.logger=INFO,CLA -Dhadoop.root.logfile=syslog -Dyarn.app.mapreduce.shuffle.logger=INFO,shuffleCLA -Dyarn.app.mapreduce.shuffle.logfile=syslog.shuffle -Dyarn.app.mapreduce.shuffle.log.filesize=0 -Dyarn.app.mapreduce.shuffle.log.backups=0 org.apache.hadoop.mapred.YarnChild 127.0.1.1 33077 attempt_1478524274348_0002_r_000000_0 4 1>/usr/local/hadoop/logs/userlogs/application_1478524274348_0002/container_1478524274348_0002_01_000004/stdout 2>/usr/local/hadoop/logs/userlogs/application_1478524274348_0002/container_1478524274348_0002_01_000004/stderr
Container killed on request. Exit code is 143
Container exited with a non-zero exit code 143
16/11/07 21:32:47 INFO mapreduce.Job: map 100% reduce 100%
16/11/07 21:32:48 INFO mapreduce.Job: Job job_1478524274348_0002 completed successfully
16/11/07 21:32:48 INFO mapreduce.Job: Counters: 50
File System Counters
FILE: Number of bytes read=3373558
FILE: Number of bytes written=7100224
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=21019219
HDFS: Number of bytes written=307797
HDFS: Number of read operations=15
HDFS: Number of large read operations=0
HDFS: Number of write operations=2
Job Counters
Failed reduce tasks=1
Launched map tasks=2
Launched reduce tasks=2
Data-local map tasks=2
Total time spent by all maps in occupied slots (ms)=12513
Total time spent by all reduces in occupied slots (ms)=7584
Total time spent by all map tasks (ms)=12513
Total time spent by all reduce tasks (ms)=7584
Total vcore-milliseconds taken by all map tasks=12513
Total vcore-milliseconds taken by all reduce tasks=7584
Total megabyte-milliseconds taken by all map tasks=12813312
Total megabyte-milliseconds taken by all reduce tasks=7766016
Map-Reduce Framework
Map input records=162852
Map output records=22115
Map output bytes=3315932
Map output materialized bytes=3373564
Input split bytes=207
Combine input records=0
Combine output records=0
Reduce input groups=177
Reduce shuffle bytes=3373564
Reduce input records=22115
Reduce output records=17692
Spilled Records=44230
Shuffled Maps =2
Failed Shuffles=0
Merged Map outputs=2
GC time elapsed (ms)=381
CPU time spent (ms)=5320
Physical memory (bytes) snapshot=727543808
Virtual memory (bytes) snapshot=22958596096
Total committed heap usage (bytes)=493355008
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=20971520
File Output Format Counters
Bytes Written=307797
16/11/07 21:32:48 INFO Join: 20161107213248192
答案 0 :(得分：1)
您的某个减少任务的第一次尝试失败但很可能已重新安排，然后成功完成，这就是您的整个作业报告成功的原因。