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https://issues.apache.org/jira/browse/AURORA-1890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864528#comment-15864528
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David McLaughlin commented on AURORA-1890:
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Just a FYI, the design there was intentional, otherwise the write volume caused
by pulses would be significant.
Plus, the Scheduler does the right thing on first pulse, right?
> Job Update Pulse History is not durably stored
> ----------------------------------------------
>
> Key: AURORA-1890
> URL: https://issues.apache.org/jira/browse/AURORA-1890
> Project: Aurora
> Issue Type: Bug
> Reporter: Zameer Manji
>
> I have experienced the following problem with pulse updates. To reproduce:
> 1. Create an update with a pulse timeout of 1h
> 2. Send a pulse to get the update going.
> 3. Failover the scheduler immediately after.
> 4. Observe that the update is awaiting another pulse right after the failover.
> This is because the {{JobUpdateControllerImpl}} stores pulse history and
> state in memory in {{PulseHandler}}. On scheduler startup, the pulse state is
> reset to no pulse received.
> We can solve this by durably storing the timestamp of the last pulse received
> in storage.
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