调试钉钉 Read timeout to oapi.dingtalk.com

java.util.concurrent.TimeoutException: Read timeout to oapi.dingtalk.com/140.205.134.70:443 of 30000 ms
    at com.ning.http.client.providers.netty.request.timeout.TimeoutTimerTask.expire(TimeoutTimerTask.java:47)
    at com.ning.http.client.providers.netty.request.timeout.ReadTimeoutTimerTask.run(ReadTimeoutTimerTask.java:57)
    at org.j boss.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:556)
    at org.j boss.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:632)
    at org.j boss.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:369)
    at org.j boss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
    at java.lang.Thread.run(Thread.java:745)
请问这个是什么情况，oapi.dingtalk.com 这个服务挂掉了？