Checking the Commissioning Result

Scenario

After an HDFS application is run, you can learn the application running conditions by viewing the running result or HDFS logs.

Procedure

• Learn the application running conditions by viewing the running result.
  • The running result of the HDFS example application is shown as follows:

    0    [main] INFO  org.apache.hadoop.security.UserGroupInformation  - Login successful for user hdfsDevelop using keytab file user.keytab
    1    [main] INFO  com.huawei.hadoop.security.LoginUtil  - Login success!!!!!!!!!!!!!!
    568  [main] WARN  org.apache.hadoop.util.NativeCodeLoader  - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    582  [main] WARN  org.apache.hadoop.hdfs.shortcircuit.DomainSocketFactory  - The short-circuit local reads feature cannot be used because libhadoop cannot be loaded.
    793  [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to create path /user/hdfs-examples
    969  [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to write.
    1068 [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to append.
    1191 [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - result is : hi, I am bigdata. It is successful if you can see me.I append this content.
    1191 [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to read.
    1202 [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to delete the file /user/hdfs-examples/test.txt
    1210 [main] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to delete path /user/hdfs-examples
    1223 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to create path /user/hdfs-examples/hdfs_example_0
    1224 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to create path /user/hdfs-examples/hdfs_example_1
    1261 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to write.
    1264 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to write.
    2807 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to append.
    2810 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to append.
    2861 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - result is : hi, I am bigdata. It is successful if you can see me.I append this content.
    2861 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to read.
    2866 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to delete the file /user/hdfs-examples/hdfs_example_0/test.txt
    2874 [hdfs_example_0] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to delete path /user/hdfs-examples/hdfs_example_0
    2874 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - result is : hi, I am bigdata. It is successful if you can see me.I append this content.
    2874 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to read.
    2879 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to delete the file /user/hdfs-examples/hdfs_example_1/test.txt
    2885 [hdfs_example_1] INFO  com.huawei.bigdata.hdfs.examples.HdfsExample  - success to delete path /user/hdfs-examples/hdfs_example_1

  • The running result of the Colocation example application is shown as follows:

    0    [main] INFO  com.huawei.hadoop.security.LoginUtil  - JaasConfiguration loginContextName=Client principal=hdfsDevelop useTicketCache=false keytabFile=/opt/hdfsDemo/conf/user.keytab
    817  [main] INFO  org.apache.hadoop.security.UserGroupInformation  - Login successful for user hdfsDevelop using keytab file user.keytab
    817  [main] INFO  com.huawei.hadoop.security.LoginUtil  - Login success!!!!!!!!!!!!!!
    1380 [main] WARN  org.apache.hadoop.util.NativeCodeLoader  - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    ...
    Create Group has finished.
    Put file is running...
    Put file has finished.
    Delete file is running...
    Delete file has finished.
    Delete Group is running...
    Delete Group has finished.
    ...

• Learn the application running conditions by viewing HDFS logs.

  The namenode logs of HDFS offer immediate visibility into application running conditions. You can adjust application programs based on the logs.