evanxuhe commented on issue #2704: Stop working after a while. error : IDs can't be null URL: https://github.com/apache/skywalking/issues/2704#issuecomment-496459093 > @evanxuhe For me I set the ui and oap uses both UTC+8 timezone but still have this issue. > I deployed them in the docker. I think the root cause is **the lack of service instance info for UI** which may be caused by one of components **agent->oap->ui** You can locate the problem as following: UI:F12 in chrome to see if services received in ui homepage, what the results show? OAP:If there are services appear in the oap log like "instance register id=XXX" to ensure the oap has info AGENT:check agent log to see if it transfers the metric and trace normally to the oap
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