钉钉开发平台，stream事件推送报错[DingTalk] establish connection

ERROR c.d.open.app.stream.network.core.DefaultSessionPool - [DingTalk] establish connection failed
com.dingtalk.open.app.api.OpenDingTalkAppException: http failed statusstatus=503,msg={"code":"ServiceUnavailable","requestid":"XXXX-E292-7051-XXXXXXXXXXXX","message":"The request has failed due to a temporary failure of the server."}
at com.dingtalk.open.app.api.DingTalkAppError.toException(DingTalkAppError.java:75)
at com.dingtalk.open.app.api.open.HttpOpenApiClient.openConnection(HttpOpenApiClient.java:45)
at com.dingtalk.open.app.api.OpenDingTalkStreamClient.openConnection(OpenDingTalkStreamClient.java:69)
at com.dingtalk.open.app.api.OpenDingTalkStreamClient.lambda$start$0(OpenDingTalkStreamClient.java:46)
at com.dingtalk.open.app.stream.network.core.DefaultSessionPool$ConnectionTask.run(DefaultSessionPool.java:155)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at shade.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)