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https://issues.apache.org/jira/browse/HDFS-9787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15140372#comment-15140372
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Guocui Mi commented on HDFS-9787:
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lastCheckpointTime is also used to check if it is necessary to do another
checkpoint. we can't mix up last checkpoint time and last upload time in order
to honor dfs.namenode.checkpoint.period
FYI: else if (secsSinceLast >= checkpointConf.getPeriod()) {
> 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: 3.0.0
> Reporter: Guocui Mi
> Assignee: Guocui Mi
> Attachments: HDFS-9786-v000.patch
>
>
> 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 || secsSinceLast >=
> 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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