comeCU opened a new issue, #4463:
URL: https://github.com/apache/shenyu/issues/4463
### Question
Hi, when I run ShenyuAdminBootstrap with coverage, it failed.
```java
2023-03-09 19:10:10 [shenyu-upstream-health-check-request-3] ERROR
org.apache.shenyu.admin.service.impl.UpstreamCheckService - check zombie
upstream the url=192.168.31.45:8884 is fail
2023-03-09 19:10:20 [shenyu-upstream-health-check-request-5] ERROR
org.apache.shenyu.common.utils.UpstreamCheckUtils - socket connect is error.
java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476)
at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394)
at java.net.Socket.connect(Socket.java:606)
at
org.apache.shenyu.common.utils.UpstreamCheckUtils.isHostConnector(UpstreamCheckUtils.java:79)
at
org.apache.shenyu.common.utils.UpstreamCheckUtils.checkUrl(UpstreamCheckUtils.java:74)
at
org.apache.shenyu.common.utils.UpstreamCheckUtils.checkUrl(UpstreamCheckUtils.java:51)
at
org.apache.shenyu.admin.service.impl.UpstreamCheckService.checkZombie0(UpstreamCheckService.java:293)
at
org.apache.shenyu.admin.service.impl.UpstreamCheckService.lambda$checkZombie$4(UpstreamCheckService.java:285)
at
java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1640)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)
2023-03-09 19:10:20 [shenyu-upstream-health-check-request-5] ERROR
org.apache.shenyu.admin.service.impl.UpstreamCheckService - check zombie
upstream the url=192.168.31.45:8884 is fail
2023-03-09 19:10:30 [shenyu-upstream-health-check-request-4] ERROR
org.apache.shenyu.common.utils.UpstreamCheckUtils - socket connect is error.
java.net.ConnectException: Connection refused (Connection refused)
……
```
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