request cannot be completed due to pending hot standby command

  Explanation:  A Hot Standby command was pervious requested from
  this node using the /NOWAIT qualifier; the command has not yet
  completed.  The command just requested cannot be completed until
  the Hot Standby feature command already active but pending on
  this node has first completed.

  User Action:  The requested Hot Standby command must be
  completed prior to issuing this command.  Use the SHOW USERS
  command to indicate the status of the Hot Standby command.