异常问题描述：
[ERROR] Failed to connect to server [ERROR] java.io.IOException [ERROR] com.alibabacloud.commons.ssh.sshj.SshjConnectionManager.createAndConnectAndAuthClient(SshjConnectionManager.java:136) [ERROR] com.alibabacloud.commons.ssh.sshj.SshjConnectionManager.makeConnection(SshjConnectionManager.java:60) [ERROR] com.alibabacloud.commons.ssh.sshj.SshjConnectionManager.makeConnection(SshjConnectionManager.java:29) [ERROR] com.alibabacloud.commons.task.SshUploadTask.run(SshUploadTask.java:75) [ERROR] com.alibabacloud.intellij.runner.host.HostRunProfileState$2.run(HostRunProfileState.java:134) [ERROR] com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:932) [ERROR] com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsync$5(CoreProgressManager.java:434) [ERROR] com.intellij.openapi.progress.impl.ProgressRunner.lambda$null$3(ProgressRunner.java:233) [ERROR] com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:166) [ERROR] com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:627) [ERROR] com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:572) [ERROR] com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:61) [ERROR] com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:153) [ERROR] com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:233) [ERROR] java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590) [ERROR] java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [ERROR] java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [ERROR] java.lang.Thread.run(Thread.java:745) [ERROR] null
解决方式：
进入 File -> Settings -> Alibaba Cloud Toolkit -> Appearance & Behavior -> System Settings
将 SSH Library 选择 JSch 即可
保存配置即可
进行测试：
打包：
包上传：
最后，感谢 阿里 ，是他们帮我解决的。
IntelliJ IDEA 使用 Cloud Toolkit 出现Failed to connect to server的报错
原文：https://www.cnblogs.com/zhangzhonghui/p/13606452.html