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    • antirez's avatar
      Sentinel: changes to tilt mode. · e5ef85c4
      antirez authored
      Tilt mode was too aggressive (not processing INFO output), this
      resulted in a few problems:
      
      1) Redirections were not followed when in tilt mode. This opened a
         window to misinform clients about the current master when a Sentinel
         was in tilt mode and a fail over happened during the time it was not
         able to update the state.
      
      2) It was possible for a Sentinel exiting tilt mode to detect a false
         fail over start, if a slave rebooted with a wrong configuration
         about at the same time. This used to happen since in tilt mode we
         lose the information that the runid changed (reboot).
      
         Now instead the Sentinel in tilt mode will still remove the instance
         from the list of slaves if it changes state AND runid at the same
         time.
      
      Both are edge conditions but the changes should overall improve the
      reliability of Sentinel.
      e5ef85c4