attempt to fix ray memory (#3205)
attempt to fix ray memory (#3205)

* attempt to fix ray memory

* exclude webui
intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL