Xiaoyu Yao created HDFS-9831:
--------------------------------

             Summary: Document webhdfs retry configuration keys introduced by 
HDFS-5219/HDFS-5122 
                 Key: HDFS-9831
                 URL: https://issues.apache.org/jira/browse/HDFS-9831
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: documentation, webhdfs
    Affects Versions: 2.6.0
            Reporter: Xiaoyu Yao


This ticket is opened to document the configuration keys introduced by 
HDFS-5219/HDFS-5122 for WebHdfs Retry.  Both hdfs-default.xml and webhdfs.md 
should be updated with the usage of these keys.

{code}
/ WebHDFS retry policy
  public static final String  DFS_HTTP_CLIENT_RETRY_POLICY_ENABLED_KEY = 
"dfs.http.client.retry.policy.enabled";
  public static final boolean DFS_HTTP_CLIENT_RETRY_POLICY_ENABLED_DEFAULT = 
false;
  public static final String  DFS_HTTP_CLIENT_RETRY_POLICY_SPEC_KEY = 
"dfs.http.client.retry.policy.spec";
  public static final String  DFS_HTTP_CLIENT_RETRY_POLICY_SPEC_DEFAULT = 
"10000,6,60000,10"; //t1,n1,t2,n2,...
  public static final String  DFS_HTTP_CLIENT_FAILOVER_MAX_ATTEMPTS_KEY = 
"dfs.http.client.failover.max.attempts";
  public static final int    DFS_HTTP_CLIENT_FAILOVER_MAX_ATTEMPTS_DEFAULT = 15;
  public static final String  DFS_HTTP_CLIENT_RETRY_MAX_ATTEMPTS_KEY = 
"dfs.http.client.retry.max.attempts";
  public static final int    DFS_HTTP_CLIENT_RETRY_MAX_ATTEMPTS_DEFAULT = 10;
  public static final String  DFS_HTTP_CLIENT_FAILOVER_SLEEPTIME_BASE_KEY = 
"dfs.http.client.failover.sleep.base.millis";
  public static final int    DFS_HTTP_CLIENT_FAILOVER_SLEEPTIME_BASE_DEFAULT = 
500;
  public static final String  DFS_HTTP_CLIENT_FAILOVER_SLEEPTIME_MAX_KEY = 
"dfs.http.client.failover.sleep.max.millis";
  public static final int    DFS_HTTP_CLIENT_FAILOVER_SLEEPTIME_MAX_DEFAULT = 
15000;
{code}



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