Description
Currently, Snapshot deletion Gc thread doesn't create an edit log transaction when the actual snapshot is garbage collected. In cases as such, what might happen is, if the gc thread deletesĀ snapshots and then namenode is restarted, snapshots which were garbage collected by the snapshot gc thread prior restart will reapper till the gc thread again picks them up for garbage collection as the edits were not captured for actual garbage collection and at the same time data might have already been deleted from the datanodes which may lead to too many spurious missing block alerts.
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