[HDFS-9831] Document webhdfs retry configuration keys introduced by HDFS-5219/HDFS-5122

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: documentation, webhdfs
• Hadoop Flags: Reviewed
• Tags: webhdfs
• Assignee: Xiaobing Zhou
• Reporter: Xiaoyu Yao
• Created: 18/Feb/16 20:14
• Updated: 30/Aug/16 01:19
• Resolved: 26/Feb/16 22:24

Description

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.

/ 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;