websock连接有时候会闪退，带有日志

2019/10/22 09:50:25 [crash] imei:34EC162F3E96446990F05518028E7F68 md:vivo X21UD A p:a os:28 net:6 vb:1.9.9.70394 mc: appid:UNIABA0542 appcount:1 wvcount:2 pn:com.xinchidao.afy mem:107524kb etype:1 eurl: carsh_info:java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object java.util.Map.remove(java.lang.Object)' on a null object reference
at io.dcloud.feature.weex_websocket.UniWebSocketModule$WebSocketEventListener.onClose(UniWebSocketModule.java:241)
at io.dcloud.feature.weex.adapter.DefaultWebSocketAdapter$1.onClose(DefaultWebSocketAdapter.java:156)
at dc.squareup.okhttp.internal.ws.RealWebSocket.peerClose(RealWebSocket.java:194)
at dc.squareup.okhttp.internal.ws.RealWebSocket.access$200(RealWebSocket.java:35)
at dc.squareup.okhttp.internal.ws.RealWebSocket$1$2.execute(RealWebSocket.java:81)
at dc.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:764)