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doc-exports/docs/mrs/umn/mrs_03_1196.html
Yang, Tong 3b1f73dece MRS UMN 2.0.38.SP20 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Yang, Tong <yangtong2@huawei.com>
Co-committed-by: Yang, Tong <yangtong2@huawei.com>
2022-12-13 12:03:34 +00:00

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How Do I Modify the HDFS Active/Standby Switchover Class?

If the org.apache.hadoop.hdfs.server.namenode.ha.AdaptiveFailoverProxyProvider class is unavailable when a cluster of MRS 3.x connects to NameNodes using HDFS, the cause is that the HDFS active/standby switchover class of the cluster is configured improperly. To solve the problem, perform the following operations:

  • Method 1: Add the hadoop-plugins-xxx.jar package to the classpath or lib directory of your program.

    The hadoop-plugins-xxx.jar package is stored in the HDFS client directory, for example, $HADOOP_HOME/share/hadoop/common/lib/hadoop-plugins-8.0.2-302023.jar.

  • Method 2: Change the configuration item of HDFS to the corresponding open source class, as shown in the follows:

    dfs.client.failover.proxy.provider.hacluster=org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider