# 在本地Windows中调测HDFS程序 #### 操作场景 在代码完成开发后，您可以在Windows开发环境中运行应用。本地和集群业务平面网络互通时，您可以直接在本地进行调测。 HDFS应用程序运行完成后，可直接通过运行结果查看应用程序运行情况，也可以通过HDFS日志获取应用运行情况。 #### 在本地Windows中调测HDFS程序 1. （可选）在开发环境中（例如IntelliJ IDEA中），运行此样例代码需要设置运行用户，设置运行用户有两种方式，添加环境变量HADOOP_USER_NAME或者修改代码。设置环境变量方法具体如下： 选中需要运行的样例程序HdfsExample.java或者ColocationExample.java，右键工程，选择"Run Configurations"，在对话框中选择"JavaApplication \> HdfsExample"进行运行参数设置。在IntelliJ IDEA的菜单栏依次选择"Run \> Edit Configurations"，在弹出的会话框中设置运行用户。 ``` -DHADOOP_USER_NAME=test ``` ![](https://support.huaweicloud.com/devg3-mrs/zh-cn_image_0263896991.png) ![](https://support.huaweicloud.com/devg3-mrs/public_sys-resources/note_3.0-zh-cn.png) 用户可向管理员咨询运行用户。test在这里只是举例，若需运行Colocation相关操作的样例代码，则此用户需属于supergroup用户组。 2. 若已按照[1]设置环境变量，则直接单击Run，运行应用工程。否则分别选中以下两个工程运行程序： - 选中HdfsExample.java，右键工程，选择"Run 'HdfsExample.main()'""运行应用工程。 - 选中ColocationExample.java，右键工程，选择"Run 'ColocationExample.main()'"运行应用工程。 ![](https://support.huaweicloud.com/devg3-mrs/public_sys-resources/note_3.0-zh-cn.png) - 在HDFS任务运行过程中禁止重启HDFS服务，否则可能会导致任务失败。 - 在运行Colocation工程时，HDFS的配置项fs.defaultFS不能配置为viewfs://ClusterX。 #### 查看调测结果 - **查看运行结果获取应用运行情况** - HdfsExample Windows样例程序运行结果如下所示。 ``` 1654 [main] WARN org.apache.hadoop.hdfs.shortcircuit.DomainSocketFactory - The short-circuit local reads feature cannot be used because UNIX Domain sockets are not available on Windows. 2013 [main] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to create path /user/hdfs-examples 2137 [main] WARN org.apache.hadoop.util.NativeCodeLoader - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2590 [main] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to write. 3245 [main] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to append. 4447 [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. 4447 [main] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to read. 4509 [main] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to delete the file /user/hdfs-examples\test.txt 4618 [main] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to delete path /user/hdfs-examples 4743 [hdfs_example_1] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to create path /user/hdfs-examples/hdfs_example_1 4743 [hdfs_example_0] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to create path /user/hdfs-examples/hdfs_example_0 5087 [hdfs_example_0] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to write. 5087 [hdfs_example_1] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to write. 6507 [hdfs_example_1] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to append. 6553 [hdfs_example_0] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to append. 7505 [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. 7505 [hdfs_example_1] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to read. 7568 [hdfs_example_1] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to delete the file /user/hdfs-examples/hdfs_example_1\test.txt 7583 [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. 7583 [hdfs_example_0] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to read. 7630 [hdfs_example_0] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to delete the file /user/hdfs-examples/hdfs_example_0\test.txt 7677 [hdfs_example_1] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to delete path /user/hdfs-examples/hdfs_example_1 7739 [hdfs_example_0] INFO com.huawei.bigdata.hdfs.examples.HdfsExample - success to delete path /user/hdfs-examples/hdfs_example_0 ``` ![](https://support.huaweicloud.com/devg3-mrs/public_sys-resources/note_3.0-zh-cn.png) 在Windows环境运行样例代码时会出现下面的异常，但是不影响业务： java.io.IOException: Could not locate executable null\\bin\\winutils.exe in the Hadoop binaries. - ColocationExample Windows样例程序运行结果如下所示。 ``` 1623 [main] WARN org.apache.hadoop.hdfs.shortcircuit.DomainSocketFactory - The short-circuit local reads feature cannot be used because UNIX Domain sockets are not available on Windows. 1670 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=***, built on 10/19/2017 04:21 GMT 1670 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment:host.name=siay7user1.china.huawei.com 1670 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment:java.version=*** 1670 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 1670 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment:java.home=D:\Program Files\Java\jre1.8.0_131 ...... Create Group has finished. Put file is running... 5930 [main] WARN org.apache.hadoop.util.NativeCodeLoader - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Put file has finished. Delete file is running... Delete file has finished. Delete Group is running... Delete Group has finished. 6866 [main] INFO org.apache.zookeeper.ZooKeeper - Session: 0x13000074b7e464b7 closed 6866 [main-EventThread] INFO org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x13000074b7e464b7 6928 [main-EventThread] INFO org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x14000073f13b657b 6928 [main] INFO org.apache.zookeeper.ZooKeeper - Session: 0x14000073f13b657b closed ``` - **查看HDFS日志获取应用运行情况** 可以查看HDFS的NameNode日志了解应用运行情况，并根据日志信息调整应用程序。