Roll back thread model
Roll back thread model


Former-commit-id: b61366af64ecc8b190a136a61afe8dd9546c8262
larryxiao/peloton,ranxian/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,larryxiao/peloton-1,larryxiao/peloton-1,ranxian/peloton,omegaga/peloton,larryxiao/peloton,larryxiao/peloton-1,larryxiao/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,amaliujia/CMUDB-peloton,ranxian/peloton,omegaga/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,ranxian/peloton,omegaga/peloton,omegaga/peloton,ranxian/peloton,omegaga/peloton,larryxiao/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,larryxiao/peloton,omegaga/peloton,ranxian/peloton,larryxiao/peloton-1,larryxiao/peloton-1,amaliujia/CMUDB-peloton