Bouncing Concurrent manager

DBAs,

I have few queries regarding bouncing CM,

* When we bounce CM,wht happens to the requests which were running and which
were pending,
   Will the running requests erorr out or complete,and wht about pending
requests,will it resume running after the bounce?

*When we run cmclean after shutting down the CM and start again,wht happens
to the running requests,does it error out?
  Wht hppns to the requests which are pending ?

Thanks in advance

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