eclipse下执行wordcount报错 java.lang.ClassNotFoundException 解决办法

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张磊杰 2017-08-29 21:58:54 ©著作权

文章标签 eclipse 执行 wordcount 文章分类 Hadoop 大数据

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eclipse下执行wordcount报错 java.lang.ClassNotFoundException

17/08/29 07:52:54 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS

17/08/29 07:52:54 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

17/08/29 07:52:55 INFO client.RMProxy: Connecting to ResourceManager at /192.168.93.130:8032

17/08/29 07:52:56 WARN mapreduce.JobResourceUploader: No job jar file set. User classes may not be found. See Job or Job#setJar(String).

17/08/29 07:52:56 INFO input.FileInputFormat: Total input paths to process : 2

17/08/29 07:52:56 INFO mapreduce.JobSubmitter: number of splits:2

17/08/29 07:52:56 INFO Configuration.deprecation: mapred.job.tracker is deprecated. Instead, use mapreduce.jobtracker.address

17/08/29 07:52:56 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS

17/08/29 07:52:56 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1503848790903_0013

17/08/29 07:52:56 INFO mapred.YARNRunner: Job jar is not present. Not adding any jar to the list of resources.

17/08/29 07:52:56 INFO impl.YarnClientImpl: Submitted application application_1503848790903_0013

17/08/29 07:52:56 INFO mapreduce.Job: The url to track the job: http://master:18088/proxy/application_1503848790903_0013/

17/08/29 07:52:56 INFO mapreduce.Job: Running job: job_1503848790903_0013

17/08/29 07:53:04 INFO mapreduce.Job: Job job_1503848790903_0013 running in uber mode : false

17/08/29 07:53:04 INFO mapreduce.Job: map 0% reduce 0%

17/08/29 07:53:09 INFO mapreduce.Job: Task Id : attempt_1503848790903_0013_m_000001_0, Status : FAILED

Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195)

at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)

at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)

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:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)

at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

Caused by: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101)

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193)

... 8 more

17/08/29 07:53:09 INFO mapreduce.Job: Task Id : attempt_1503848790903_0013_m_000000_0, Status : FAILED

Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195)

at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)

at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)

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:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)

at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

Caused by: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101)

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193)

... 8 more

17/08/29 07:53:14 INFO mapreduce.Job: Task Id : attempt_1503848790903_0013_m_000001_1, Status : FAILED

Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195)

at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)

at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)

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:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)

at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

Caused by: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101)

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193)

... 8 more

17/08/29 07:53:14 INFO mapreduce.Job: Task Id : attempt_1503848790903_0013_m_000000_1, Status : FAILED

Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195)

at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)

at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)

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:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)

at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

Caused by: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101)

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193)

... 8 more

17/08/29 07:53:19 INFO mapreduce.Job: Task Id : attempt_1503848790903_0013_m_000001_2, Status : FAILED

Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195)

at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)

at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)

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:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)

at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

Caused by: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101)

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193)

... 8 more

17/08/29 07:53:20 INFO mapreduce.Job: Task Id : attempt_1503848790903_0013_m_000000_2, Status : FAILED

Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2195)

at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)

at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)

at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)

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:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)

at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

Caused by: java.lang.ClassNotFoundException: Class com.asiainfo.demo.count.WorldTest$MyWorld not found

at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2101)

at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2193)

... 8 more

Container killed by the ApplicationMaster.

Container killed on request. Exit code is 143

Container exited with a non-zero exit code 143

17/08/29 07:53:25 INFO mapreduce.Job: map 100% reduce 100%

17/08/29 07:53:25 INFO mapreduce.Job: Job job_1503848790903_0013 failed with state FAILED due to: Task failed task_1503848790903_0013_m_000001

Job failed as tasks failed. failedMaps:1 failedReduces:0

17/08/29 07:53:25 INFO mapreduce.Job: Counters: 13

Job Counters

Failed map tasks=8

Killed reduce tasks=1

Launched map tasks=8

Other local map tasks=6

Data-local map tasks=2

Total time spent by all maps in occupied slots (ms)=28393

Total time spent by all reduces in occupied slots (ms)=0

Total time spent by all map tasks (ms)=28393

Total time spent by all reduce tasks (ms)=0

Total vcore-milliseconds taken by all map tasks=28393

Total vcore-milliseconds taken by all reduce tasks=0

Total megabyte-milliseconds taken by all map tasks=29074432

Total megabyte-milliseconds taken by all reduce tasks=0

解决方法把你的工程导成jar包，然后在Configuration 对象上设置conf.set("mapred.jar", "/eclipse-jee/eclipse/demo.jar");

或者设置Job对象执行的jar包路径 job.setJar("/eclipse-jee/eclipse/demo.jar");

下面是我写的例子

Configuration conf = new Configuration();

conf.set("fs.default.name", "hdfs://192.168.93.130:9000");

conf.set("mapred.job.tracker", "9001");

conf.set("hadoop.job.user", "root");

conf.set("mapreduce.framework.name", "yarn");

conf.set("yarn.resourcemanager.address", "192.168.93.130:8032");

conf.set("mapreduce.jobtracker.address","192.168.93.130:9001");

conf.set("yarn.resourcemanager.hostname", "192.168.93.130");

conf.set("yarn.resourcemanager.admin.address", "192.168.93.130:8033");

conf.set("yarn.resourcemanager.address", "192.168.93.130:8032");

conf.set("yarn.resourcemanager.resource-tracker.address", "192.168.93.130:8036");

conf.set("yarn.resourcemanager.scheduler.address", "192.168.93.130:8030");

conf.set("mapred.jar", "/eclipse-jee/eclipse/demo.jar");

String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

if (otherArgs.length != 2) {

System.out.println("stage not exis input output");

System.exit(2);

}

Job job = new Job(conf, "job" + Calendar.getInstance().getTimeInMillis());

//job.setJar("/eclipse-jee/eclipse/demo.jar");

job.setMapperClass(MyWorld.class);

job.setCombinerClass(MyReduce.class);

job.setReducerClass(MyReduce.class);

job.setOutputKeyClass(Text.class);

job.setOutputValueClass(IntWritable.class);

FileInputFormat.addInputPath(job, new Path(otherArgs[0]));

FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));

System.out.println(job.waitForCompletion(true) ? 0 : 1);

重新执行下你的代码就可以了效果如下；

可以在jobhistory地址中查看到执行的历史记录 http://master:19888/jobhistory/app 【主节点上要先开启mr-jobhistory-daemon.sh服务】

还可以在yarn上查看 http://192.168.93.130:18088/cluster/apps/FINISHED

17/09/02 23:17:24 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS

17/09/02 23:17:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

17/09/02 23:17:25 INFO client.RMProxy: Connecting to ResourceManager at /192.168.93.130:8032

17/09/02 23:17:27 INFO input.FileInputFormat: Total input paths to process : 2

17/09/02 23:17:27 INFO mapreduce.JobSubmitter: number of splits:2

17/09/02 23:17:27 INFO Configuration.deprecation: mapred.job.tracker is deprecated. Instead, use mapreduce.jobtracker.address

17/09/02 23:17:27 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS

17/09/02 23:17:27 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1504364765355_0001

17/09/02 23:17:28 INFO impl.YarnClientImpl: Submitted application application_1504364765355_0001

17/09/02 23:17:28 INFO mapreduce.Job: The url to track the job: http://master:18088/proxy/application_1504364765355_0001/

17/09/02 23:17:28 INFO mapreduce.Job: Running job: job_1504364765355_0001

17/09/02 23:17:37 INFO mapreduce.Job: Job job_1504364765355_0001 running in uber mode : false

17/09/02 23:17:37 INFO mapreduce.Job: map 0% reduce 0%

17/09/02 23:17:47 INFO mapreduce.Job: map 100% reduce 0%

17/09/02 23:17:53 INFO mapreduce.Job: map 100% reduce 100%

17/09/02 23:17:53 INFO mapreduce.Job: Job job_1504364765355_0001 completed successfully

17/09/02 23:17:54 INFO mapreduce.Job: Counters: 49

File System Counters

FILE: Number of bytes read=247

FILE: Number of bytes written=357769

FILE: Number of read operations=0

FILE: Number of large read operations=0

FILE: Number of write operations=0

HDFS: Number of bytes read=383

HDFS: Number of bytes written=157

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)=14625

Total time spent by all reduces in occupied slots (ms)=3482

Total time spent by all map tasks (ms)=14625

Total time spent by all reduce tasks (ms)=3482

Total vcore-milliseconds taken by all map tasks=14625

Total vcore-milliseconds taken by all reduce tasks=3482

Total megabyte-milliseconds taken by all map tasks=14976000

Total megabyte-milliseconds taken by all reduce tasks=3565568

Map-Reduce Framework

Map input records=13

Map output records=30

Map output bytes=293

Map output materialized bytes=253

Input split bytes=209

Combine input records=30

Combine output records=21

Reduce input groups=21

Reduce shuffle bytes=253

Reduce input records=21

Reduce output records=21

Spilled Records=42

Shuffled Maps =2

Failed Shuffles=0

Merged Map outputs=2

GC time elapsed (ms)=386

CPU time spent (ms)=2480

Physical memory (bytes) snapshot=620863488

Virtual memory (bytes) snapshot=1672093696

Total committed heap usage (bytes)=497025024

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=174

File Output Format Counters

Bytes Written=157

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