[jira] [Created] (HADOOP-14585) Ensure controls in-place to prevent clients with significant clock skews pruning aggressively

["Sean Mackrory (JIRA)" <ji...@apache.org>]

Sean Mackrory created HADOOP-14585:
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             Summary: Ensure controls in-place to prevent clients with significant clock skews pruning aggressively
                 Key: HADOOP-14585
                 URL: https://issues.apache.org/jira/browse/HADOOP-14585
             Project: Hadoop Common
          Issue Type: Sub-task
            Reporter: Sean Mackrory


From discussion on HADOOP-14499:

{quote}
bear in mind that we can't guarantee that the clocks of all clients are in sync; you don't want a client whose TZ setting is wrong to aggressively prune things. Had that happen in production with files in shared filestore. This is why ant -diagnostics checks time consistency with temp files...
{quote}
{quote}
temp files work on a shared FS. AWS is actually somewhat sensitive to clocks: if your VM is too far out of time then auth actually fails, its ~+-15 minutes. There's some stuff in the Java SDK to actually calculate and adjust clock skew, presumably parsing the timestamp of a failure, calculating the difference and retrying. Which means that the field in SDKGlobalConfiguration could help identify the difference between local time and AWS time.
{quote}



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