Java.lang.ClassNotFoundException solution to execute wordcount error report under eclipse
Execute wordcount error java.lang.ClassNotFoundException under eclipse
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
07:52:56 on 17-08-29 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
one
The solution is to import your project into a jar package, and then set conf.set ("mapred.jar", "/ eclipse-jee/eclipse/demo.jar") on the Configuration object.
Or set the jar package path job.setJar ("/ eclipse-jee/eclipse/demo.jar") executed by the Job object
Here's an example I wrote.
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", "192.168.93.130pur8032")
Conf.set ("mapreduce.jobtracker.address", "192.168.93.130VR 9001")
Conf.set ("yarn.resourcemanager.hostname", "192.168.93.130")
Conf.set ("yarn.resourcemanager.admin.address", "192.168.93.130pur8033")
Conf.set ("yarn.resourcemanager.address", "192.168.93.130pur8032")
Conf.set ("yarn.resourcemanager.resource-tracker.address", "192.168.93.130pur8036")
Conf.set ("yarn.resourcemanager.scheduler.address", "192.168.93.130pur8030")
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)
Just re-execute your code and the effect is as follows
You can find the execution history http://master:19888/jobhistory/app in the jobhistory address. [the mr-jobhistory-daemon.sh service should be enabled on the master node first]
You can also view http://192.168.93.130:18088/cluster/apps/FINISHED on yarn
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
23:17:28 on 17-09-02 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
0
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
