Github user WangCHX commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1223#discussion_r41349100
  
    --- Diff: docs/apis/programming_guide.md ---
    @@ -1992,6 +1992,8 @@ With the closure cleaner disabled, it might happen 
that an anonymous user functi
     
     - `getNumberOfExecutionRetries()` / `setNumberOfExecutionRetries(int 
numberOfExecutionRetries)` Sets the number of times that failed tasks are 
re-executed. A value of zero effectively disables fault tolerance. A value of 
`-1` indicates that the system default value (as defined in the configuration) 
should be used.
     
    +- `getExecutionRetryDelay()` / `setExecutionRetryDelay(long 
executionRetryDelay)` Sets the delay that failed tasks are re-executed. A value 
of `-1` indicates that the default value should be used.
    --- End diff --
    
    much better than mine. Thanks.


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