Guocui Mi created HDFS-9787:
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             Summary: SNNs stop uploading FSImage to ANN once 
isPrimaryCheckPointer changed to false.
                 Key: HDFS-9787
                 URL: https://issues.apache.org/jira/browse/HDFS-9787
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: ha
    Affects Versions: 2.6.2
            Reporter: Guocui Mi


SNNs stop uploading FSImage to ANN once isPrimaryCheckPointer become false. 
Here is the logic to check if upload FSImage or not.
In StandbyCheckpointer.java
boolean sendRequest = isPrimaryCheckPointer || secsSinceLastUpload >= 
checkpointConf.getQuietPeriod();
            doCheckpoint(sendRequest);

The sendRequest is always false if isPrimaryCheckPointer is false giving 
secsSinceLast (~checkpointPeriod) >= checkpointConf.getQuietPeriod() 
(checkpointPeriod * this.quietMultiplier(default value 1.5)) always returns 
false.



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