빌드 오류 발생

Handler:
             Type = com.njonecompany.web.controller.WelcomeController
           Method = com.njonecompany.web.controller.WelcomeController#index(Model)

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = null

ModelAndView:
        View name = index
             View = null
        Attribute = msg
            value = Hi, there
        Attribute = today
            value = Sun Nov 26 13:37:44 UTC 2023

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 200
    Error message = null
          Headers = [Content-Language:"en"]
     Content type = null
             Body = 
    Forwarded URL = /WEB-INF/views/index.jsp
   Redirected URL = null
          Cookies = []
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.51 s - in com.njonecompany.web.TestWelcome
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[JENKINS] Recording test results
[INFO] 
[INFO] --- maven-war-plugin:3.2.2:war (default-war) @ web ---
[INFO] Packaging webapp
[INFO] Assembling webapp [web] in [/var/jenkins_home/workspace/My-Third-Project/target/hello-world]
[INFO] Processing war project
[INFO] Copying webapp resources [/var/jenkins_home/workspace/My-Third-Project/src/main/webapp]
[INFO] Webapp assembled in [29 msecs]
[INFO] Building war: /var/jenkins_home/workspace/My-Third-Project/target/hello-world.war
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  3.822 s
[INFO] Finished at: 2023-11-26T13:37:45Z
[INFO] ------------------------------------------------------------------------
Waiting for Jenkins to finish collecting data
[JENKINS] Archiving /var/jenkins_home/workspace/My-Third-Project/pom.xml to com.njonecompany.web/web/1.0/web-1.0.pom
[JENKINS] Archiving /var/jenkins_home/workspace/My-Third-Project/target/hello-world.war to com.njonecompany.web/web/1.0/web-1.0.war
channel stopped
[DeployPublisher][INFO] Attempting to deploy 1 war file(s)
[DeployPublisher][INFO] Deploying /var/jenkins_home/workspace/My-Third-Project/target/hello-world.war to container Tomcat 9.x Remote with context null
ERROR: Build step failed with exception
org.codehaus.cargo.container.ContainerException: Failed to redeploy [/var/jenkins_home/workspace/My-Third-Project/target/hello-world.war]
	at org.codehaus.cargo.container.tomcat.internal.AbstractTomcatManagerDeployer.redeploy(AbstractTomcatManagerDeployer.java:176)
	at hudson.plugins.deploy.CargoContainerAdapter.deploy(CargoContainerAdapter.java:81)
	at hudson.plugins.deploy.CargoContainerAdapter$DeployCallable.invoke(CargoContainerAdapter.java:167)
	at hudson.plugins.deploy.CargoContainerAdapter$DeployCallable.invoke(CargoContainerAdapter.java:136)
	at hudson.FilePath.act(FilePath.java:1198)
	at hudson.FilePath.act(FilePath.java:1181)
	at hudson.plugins.deploy.CargoContainerAdapter.redeployFile(CargoContainerAdapter.java:133)
	at hudson.plugins.deploy.PasswordProtectedAdapterCargo.redeployFile(PasswordProtectedAdapterCargo.java:95)
	at hudson.plugins.deploy.DeployPublisher.perform(DeployPublisher.java:113)
	at jenkins.tasks.SimpleBuildStep.perform(SimpleBuildStep.java:123)
	at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:80)
	at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:47)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:818)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:767)
	at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.post2(MavenModuleSetBuild.java:1072)
	at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:711)
	at hudson.model.Run.execute(Run.java:1918)
	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:543)
	at hudson.model.ResourceController.execute(ResourceController.java:101)
	at hudson.model.Executor.run(Executor.java:442)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
	at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
	at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
	at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
	at java.base/java.net.Socket.connect(Socket.java:609)
	at java.base/java.net.Socket.connect(Socket.java:558)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:509)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:604)
	at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:277)
	at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:376)
	at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:397)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1253)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015)
	at org.codehaus.cargo.container.tomcat.internal.TomcatManager.invoke(TomcatManager.java:567)
	at org.codehaus.cargo.container.tomcat.internal.TomcatManager.list(TomcatManager.java:882)
	at org.codehaus.cargo.container.tomcat.internal.TomcatManager.getStatus(TomcatManager.java:895)
	at org.codehaus.cargo.container.tomcat.internal.AbstractTomcatManagerDeployer.redeploy(AbstractTomcatManagerDeployer.java:161)
	... 19 more
java.net.ConnectException: Connection refused (Connection refused)
	at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
	at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
	at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
	at java.base/java.net.Socket.connect(Socket.java:609)
	at java.base/java.net.Socket.connect(Socket.java:558)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:509)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:604)
	at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:277)
	at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:376)
	at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:397)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1253)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015)
	at org.codehaus.cargo.container.tomcat.internal.TomcatManager.invoke(TomcatManager.java:567)
	at org.codehaus.cargo.container.tomcat.internal.TomcatManager.list(TomcatManager.java:882)
	at org.codehaus.cargo.container.tomcat.internal.TomcatManager.getStatus(TomcatManager.java:895)
	at org.codehaus.cargo.container.tomcat.internal.AbstractTomcatManagerDeployer.redeploy(AbstractTomcatManagerDeployer.java:161)
	at hudson.plugins.deploy.CargoContainerAdapter.deploy(CargoContainerAdapter.java:81)
	at hudson.plugins.deploy.CargoContainerAdapter$DeployCallable.invoke(CargoContainerAdapter.java:167)
	at hudson.plugins.deploy.CargoContainerAdapter$DeployCallable.invoke(CargoContainerAdapter.java:136)
	at hudson.FilePath.act(FilePath.java:1198)
	at hudson.FilePath.act(FilePath.java:1181)
	at hudson.plugins.deploy.CargoContainerAdapter.redeployFile(CargoContainerAdapter.java:133)
	at hudson.plugins.deploy.PasswordProtectedAdapterCargo.redeployFile(PasswordProtectedAdapterCargo.java:95)
	at hudson.plugins.deploy.DeployPublisher.perform(DeployPublisher.java:113)
	at jenkins.tasks.SimpleBuildStep.perform(SimpleBuildStep.java:123)
	at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:80)
	at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:47)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:818)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:767)
	at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.post2(MavenModuleSetBuild.java:1072)
	at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:711)
	at hudson.model.Run.execute(Run.java:1918)
	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:543)
	at hudson.model.ResourceController.execute(ResourceController.java:101)
	at hudson.model.Executor.run(Executor.java:442)
Build step 'Deploy war/ear to a container' marked build as failure
Finished: FAILURE

강사님 톰캣 서버 연동 강의를 따라했는데, 오류가 발생합니다! 아무리 시도해봐도 해결이 안나서 올려봅니다. 혹시 해결책을 알 수 있을까요..?