Help Center/ MapReduce Service/ Developer Guide (Normal_3.x)/ MapReduce Development Guide (Normal Mode)/ Commissioning the Application/ Commissioning the Application in the Windows Environment/ Checking the Commissioning Result
Updated on 2022-09-14 GMT+08:00
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Checking the Commissioning Result

Scenario

After a MapReduce application is run, you can check the running result through one of the following methods:
  • Viewing the program running status in IntelliJ IDEA.
  • Viewing MapReduce logs.
  • Logging in to the MapReduce WebUI.
  • Logging in to the Yarn WebUI.

You must have permission to access WebUI. If not, contact the admin to obtain an account and password.

Procedure

  • Check the running result by obtaining the MapReduce log.

    As shown below, the console outputs the application running result.

    3614 [main] INFO  org.apache.hadoop.hdfs.PeerCache  - SocketCache disabled.
10159 [main] INFO  org.apache.hadoop.mapreduce.lib.input.FileInputFormat  - Total input files to process : 2
11378 [main] INFO  org.apache.hadoop.mapreduce.JobSubmitter  - number of splits:2
12707 [main] INFO  org.apache.hadoop.mapreduce.JobSubmitter  - Submitting tokens for job: job_1468241424339_0002
16434 [main] INFO  org.apache.hadoop.yarn.client.api.impl.YarnClientImpl  - Submitted application application_1468241424339_0002
16656 [main] INFO  org.apache.hadoop.mapreduce.Job  - The url to track the job: http://10-120-180-170:8088/proxy/application_1468241424339_0002/
16657 [main] INFO  org.apache.hadoop.mapreduce.Job  - Running job: job_1468241424339_0002
31177 [main] INFO  org.apache.hadoop.mapreduce.Job  - Job job_1468241424339_0002 running in uber mode : false
31200 [main] INFO  org.apache.hadoop.mapreduce.Job  -  map 0% reduce 0%
45893 [main] INFO  org.apache.hadoop.mapreduce.Job  -  map 100% reduce 0%
57172 [main] INFO  org.apache.hadoop.mapreduce.Job  -  map 100% reduce 100%
58554 [main] INFO  org.apache.hadoop.mapreduce.Job  - Job job_1468241424339_0002 completed successfully
58908 [main] INFO  org.apache.hadoop.mapreduce.Job  - Counters: 49
File System Counters
FILE: Number of bytes read=75
FILE: Number of bytes written=436979
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=674
HDFS: Number of bytes written=23
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)=206088
Total time spent by all reduces in occupied slots (ms)=73824
Total time spent by all map tasks (ms)=25761
Total time spent by all reduce tasks (ms)=9228
Total vcore-seconds taken by all map tasks=25761
Total vcore-seconds taken by all reduce tasks=9228
Total megabyte-seconds taken by all map tasks=105517056
Total megabyte-seconds taken by all reduce tasks=37797888
Map-Reduce Framework
Map input records=26
Map output records=16
Map output bytes=186
Map output materialized bytes=114
Input split bytes=230
Combine input records=16
Combine output records=6
Reduce input groups=3
Reduce shuffle bytes=114
Reduce input records=6
Reduce output records=2
Spilled Records=12
Shuffled Maps =2
Failed Shuffles=0
Merged Map outputs=2
GC time elapsed (ms)=356
CPU time spent (ms)=2860
Physical memory (bytes) snapshot=1601576960
Virtual memory (bytes) snapshot=12999819264
Total committed heap usage (bytes)=2403336192
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=444
File Output Format Counters 
Bytes Written=23

    In the Windows environment, the following exception occurs but does not affect services.

    java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.

  • Check the running result by using MapReduce WebUI.

    LLog in to FusionInsight Manager as a user who has the permission to view task and choose Cluster > Name of the desired cluster > Services > Mapreduce > JobHistoryServer. On the web page that is displayed, view the task execution status.

    Figure 1 JobHistory Web UI
  • Check the running result by using YARN WebUI.
    Log in to FusionInsight Manager as a user who has the permission to view task and choose Cluster > Name of the desired cluster > Services > Yarn > ResourceManager(Active). On the web page that is displayed, view the task execution status.
    Figure 2 ResourceManager Web UI
  • View MapReduce logs to learn application running conditions.

    MapReduce logs offers immediate visibility into application running conditions. You can adjust application programs based on the logs.