Viewing the HDFS Application Commissioning Result

Scenario

After HDFS application running is complete, you can obtain the running status by viewing the running result or HDFS logs.

Procedure

1. Viewing running results to learn application running status
   • The following provides the running result of the HdfsMain Linux sample application in the security cluster:

     [root@node-master1dekG client]# hadoop jar hdfs-examples-1.0.jar com.huawei.bigdata.hdfs.examples.HdfsMain
     WARNING: Use "yarn jar" to launch YARN applications.
     20/03/25 16:29:45 INFO security.UserGroupInformation: Login successful for user hdfsuser using keytab file user.keytab
     20/03/25 16:29:45 INFO security.LoginUtil: Login success!!!!!!!!!!!!!!
     success to create path /user/hdfs-examples
     success to write.
     result is : hi, I am bigdata. It is successful if you can see me.
     success to read.
     success to delete the file /user/hdfs-examples/test.txt
     success to delete path /user/hdfs-examples
     success to create path /user/hdfs-examples
     StoragePolicy:FROZEN
     StoragePolicy:COLD
     StoragePolicy:WARM
     StoragePolicy:HOT
     StoragePolicy:ONE_SSD
     StoragePolicy:ALL_SSD
     StoragePolicy:LAZY_PERSIST
     succeed to set Storage Policy path /user/hdfs-examples
     success to delete path /user/hdfs-examples

   • The following provides the running result of the HdfsMain Linux sample application in the normal cluster:

     [root@node-master2VknR client]# hadoop jar hdfs-examples-1.0.jar com.huawei.bigdata.hdfs.examples.HdfsMain
     WARNING: Use "yarn jar" to launch YARN applications.
     success to create path /user/hdfs-examplessuccess to write.
     result is : hi, I am bigdata. It is successful if you can see me.
     success to read.
     success to delete the file /user/hdfs-examples/test.txt
     success to delete path /user/hdfs-examples
     success to create path /user/hdfs-examples
     StoragePolicy:FROZEN
     StoragePolicy:COLD
     StoragePolicy:WARM
     StoragePolicy:HOT
     StoragePolicy:ONE_SSD
     StoragePolicy:ALL_SSD
     StoragePolicy:LAZY_PERSIST
     succeed to set Storage Policy path /user/hdfs-examples
     success to delete path /user/hdfs-examples

2. Viewing HDFS logs to learn application running status

   View HDFS namenode logs to learn application running status, and adjust applications based on log information.