arcgis portal 启动失败

<Msg time="2018-06-04T17:50:29,154" type="SEVERE" code="217003" source="Portal" process="1584" thread="1" methodName="" machine="AGSPORTAL.O.CN" user="" elapsed="">启动配置观察器前出现错误。 文件提前结束。</Msg>
<Msg time="2018-06-04T17:50:29,154" type="SEVERE" code="217075" source="Portal" process="1584" thread="1" methodName="" machine="AGSPORTAL.O.CN" user="" elapsed="">门户启动失败。 The observer's beforeStart() function returned a failure.</Msg>