【Azure Web App】Github Action部署Jar包到App Service报400错误

问题描述

通过github aciton部署azure app service服务的时候，遇见400报错。
报错信息非常简单：

Starting deployment for web app...
Package deployment using OneDeploy initiated.
Error: Failed to deploy web package to App Service.
Error: Deployment Failed, Error: Failed to deploy web package using OneDeploy to App Service.
Bad Request (CODE: 400)

这个问题应该如何调查呢？
 
问题解答

在Github Aciton中，使用 Azure WebApp(azure/webapps-deploy@v3)来部署App Service的应用, 这次部署的是一个jar包。
Github Action  脚本:

- name: Azure WebApp
uses: azure/webapps-deploy@v3
with:
app-name: ''
package: ${{ github.workspace }}/target/*.jar

查看Azure文档，介绍部署java应用时，使用az cli命令，github action和maven 插件都是使用的Kudu OneDeploy接口( https://.scm.chinacloudsites.cn/api/publish?type=jar )

(文档链接：https://docs.azure.cn/zh-cn/app-service/configure-language-java-deploy-run?tabs=linux&pivots=java-tomcat#deploying-your-app)
 
根据以上信息，就尝试使用az webapp deploy命令直接部署jar包应用，发现多了一句错误提示信息：

> az webapp deploy --resource-group  --name  --src-path myjava.jar --type jar
Initiating deployment
Deploying from local path: myjava.jar
An error occurred during deployment. Status Code: 400,
Details: "Artifact type = 'Jar' cannot be deployed to stack = 'TOMCAT'. Site should be configured to run with stack = JAVA",
Please visit https://XXXXXXXXX.scm.chinacloudsites.cn/api/deployments/latest to get more information about your deployment

这句错误消息非常关键(Artifact type = 'Jar' cannot be deployed to stack = 'TOMCAT'. Site should be configured to run with stack = JAVA")。
在查看App Service的配置信息后，Stack果然设置为Tomcat。

因为这里只有两种选项( Tomcat 和Java SE )。于是，修改为Java SE后，再次部署jar包。

成功。
 
当问题解决后，想进一步验证是否是one deploy接口对jar包的强制限制。
恰好kudu也是开源项目，所以，进入github kudu 仓库 (源码：https://github.com/projectkudu/kudu/tree/master )，使用错误消息关键字整库搜索“cannot be deployed to stack”，最终，定位到 PushDeploymentController.cs 中，有如下的验证条件：

• 当部署的文件为Jar时，需要判断目标App Service的Stack只能是JavaSE。如果不是，返回400的状态码
  

 
附录一：使用 curl 命令直接调用接口也可以复现问题，效果和az webapp deploy命令相同

1. curl -X POST \
3.      -u user:password \
5.      -T "/Users/Downloads/xxxxx-0.0.1-SNAPSHOT.jar" \
7.      "https://xxxxx.scm.chinacloudsites.cn/api/publish?type=jar" \
9.      -v
13. * Host xxxxx.scm.chinacloudsites.cn:443 was resolved.
15. * IPv6: (none)
17. * IPv4: 159.27.20.0
19. *   Trying 159.27.20.0:443...
21. * Connected to xxxxx.scm.chinacloudsites.cn (159.27.20.0) port 443
23. * ALPN: curl offers h2,http/1.1
25. * (304) (OUT), TLS handshake, Client hello (1):
27. *  CAfile: /etc/ssl/cert.pem
29. *  CApath: none
31. * (304) (IN), TLS handshake, Server hello (2):
33. * (304) (OUT), TLS handshake, Client hello (1):
35. * (304) (IN), TLS handshake, Server hello (2):
37. * (304) (IN), TLS handshake, Unknown (8):
39. * (304) (IN), TLS handshake, Certificate (11):
41. * (304) (IN), TLS handshake, CERT verify (15):
43. * (304) (IN), TLS handshake, Finished (20):
45. * (304) (OUT), TLS handshake, Finished (20):
47. * SSL connection using TLSv1.3 / AEAD-AES256-GCM-SHA384 / [blank] / UNDEF
49. * ALPN: server accepted http/1.1
51. * Server certificate:
53. *  subject: C=CN; ST=Shanghai; O=Shanghai Blue Cloud Technology Co., Ltd.; CN=*.chinacloudsites.cn
55. *  start date: Dec 19 00:00:00 2025 GMT
57. *  expire date: Jun 17 23:59:59 2026 GMT
59. *  subjectAltName: host "xxxxx.scm.chinacloudsites.cn" matched cert's "*.scm.chinacloudsites.cn"
61. *  issuer: C=US; O=DigiCert Inc; CN=DigiCert Basic RSA CN CA G2
63. *  SSL certificate verify ok.
65. * using HTTP/1.x
67. * Server auth using Basic with user 'deploypoc'
69. > POST /api/publish?type=jar HTTP/1.1
71. > Host: xxxxx.scm.chinacloudsites.cn
73. > Authorization: Basic xxxxxxxxxxxxxxxx
75. > User-Agent: curl/8.7.1
77. > Accept: */*
79. > Content-Length: 25578166
81. > Expect: 100-continue
83. >
85. * Done waiting for 100-continue
87. < HTTP/1.1 400 Bad Request
89. < Content-Type: text/plain; charset=utf-8
91. < Date: Wed, 31 Dec 2025 03:42:36 GMT
93. < Server: Kestrel
95. < Set-Cookie: ARRAffinity=xxxx;Path=/;HttpOnly;Secure;Domain=xxxxx.scm.chinacloudsites.cn
97. < Set-Cookie: ARRAffinitySameSite=xxxxx;Path=/;HttpOnly;SameSite=None;Secure;Domain=xxxxx.scm.chinacloudsites.cn
99. < Transfer-Encoding: chunked
101. <
103. * HTTP error before end of send, stop sending
105. * abort upload after having sent 589824 bytes
107. * Closing connection
109. Artifact type = 'Jar' cannot be deployed to stack = 'TOMCAT'. Site should be configured to run with stack = JAVA%   

复制代码

 
 
参考资料

App Service部署Java应用：https://docs.azure.cn/zh-cn/app-service/configure-language-java-deploy-run?tabs=linux&pivots=java-tomcat#deploying-your-app
Kudu One Deploy Source Code ： https://github.com/projectkudu/kudu/blob/master/Kudu.Services/Deployment/PushDeploymentController.cs#L304
 

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