使用 Intellij IDEA 重新加载远程 Spring Boot 应用程序时出现异常

Posted 2023-02-27

【中文标题】使用 Intellij IDEA 重新加载远程 Spring Boot 应用程序时出现异常

【英文标题】：Exception on reloading remote spring boot application with Intellij IDEA

【发布时间】：2016-11-08 10:00:24

【问题描述】：

我正在尝试使用 spring devtools、docker 和 IntelliJ 设置远程 spring-boot 环境。一切都从这个article开始。不幸的是，它随机失败并出现异常。配置下方：

Dockerfile

FROM        java:8

EXPOSE      8888

WORKDIR     /app

ADD         build.gradle    /app/build.gradle
ADD         gradlew         /app/gradlew
ADD         gradle          /app/gradle

ADD         src             /app/src

RUN         ["chmod", "+x", "/app/gradlew"]

docker-compose.yml

backend:
  build: .
  env_file: environment
  ports:
    - "8888:8888"
  volumes:
    - ./.gradle-docker:/root/.gradle
  command: "/app/gradlew clean bootRun"
  links:
    - db

db:
  image:  postgres:9.5.3
  env_file: environment
  ports:
    - "5454:5432"

整个应用程序从命令行启动：docker-compose build 和 docker-compose up 命令。

在 IntelliJ 中，我准备了以下 java 应用程序配置：

docker:8888 是 docker-machine 的 IP 和 spring 应用程序使用的端口。配置运行后输出如下：

/\\ / ___'_ __ _ _(_)_ __  __ _          ___               _      \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` |        | _ \___ _ __  ___| |_ ___ \ \ \ \
\\/  ___)| |_)| | | | | || (_| []::::::[]   / -_) '  \/ _ \  _/ -_) ) ) ) )
 '  |____| .__|_| |_|_| |_\__, |        |_|_\___|_|_|_\___/\__\___|/ / / /
=========|_|==============|___/===================================/_/_/_/
:: Spring Boot Remote ::  (v1.3.5.RELEASE)

2016-07-06 12:48:51.997  INFO 17731 --- [           main] o.s.b.devtools.RemoteSpringApplication   : Starting RemoteSpringApplication v1.3.5.RELEASE on opal-mac.local with PID 17731 (/Users/opal/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-devtools/1.3.5.RELEASE/ab035bdc1e6297ff4c8676edd93ed307b11353c2/spring-boot-devtools-1.3.5.RELEASE.jar started by opal in /Users/opal/projects/backend)
2016-07-06 12:48:52.013  INFO 17731 --- [           main] o.s.b.devtools.RemoteSpringApplication   : No active profile set, falling back to default profiles: default
2016-07-06 12:48:52.106  INFO 17731 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@441772e: startup date [Wed Jul 06 12:48:52 CEST 2016]; root of context hierarchy
2016-07-06 12:48:54.016  WARN 17731 --- [           main] o.s.b.d.r.c.RemoteClientConfiguration    : The connection to http://docker:8888 is insecure. You should use a URL starting with 'https://'.
2016-07-06 12:48:54.419  WARN 17731 --- [           main] o.s.b.d.a.OptionalLiveReloadServer       : Unable to start LiveReload server
2016-07-06 12:48:54.499  INFO 17731 --- [           main] o.s.b.devtools.RemoteSpringApplication   : Started RemoteSpringApplication in 3.793 seconds (JVM running for 5.004)

不幸的是，对代码进行了一些更改后，出现以下异常：

2016-07-06 12:49:29.141  INFO 17731 --- [   File Watcher] o.s.b.d.r.c.ClassPathChangeUploader      : Uploaded 1 class resource
2016-07-06 12:49:31.056  INFO 17731 --- [   File Watcher] o.s.b.d.r.c.ClassPathChangeUploader      : Uploaded 1 class resource
Exception in thread "File Watcher" java.lang.IllegalStateException: java.net.ConnectException: Connection refused
    at org.springframework.boot.devtools.remote.client.ClassPathChangeUploader.onApplicationEvent(ClassPathChangeUploader.java:107)
    at org.springframework.boot.devtools.remote.client.ClassPathChangeUploader.onApplicationEvent(ClassPathChangeUploader.java:56)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:381)
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:335)
    at org.springframework.boot.devtools.classpath.ClassPathFileChangeListener.publishEvent(ClassPathFileChangeListener.java:68)
    at org.springframework.boot.devtools.classpath.ClassPathFileChangeListener.onChange(ClassPathFileChangeListener.java:64)
    at org.springframework.boot.devtools.filewatch.FileSystemWatcher.fireListeners(FileSystemWatcher.java:230)
    at org.springframework.boot.devtools.filewatch.FileSystemWatcher.updateSnapshots(FileSystemWatcher.java:223)
    at org.springframework.boot.devtools.filewatch.FileSystemWatcher.scan(FileSystemWatcher.java:183)
    at org.springframework.boot.devtools.filewatch.FileSystemWatcher.access$100(FileSystemWatcher.java:41)
    at org.springframework.boot.devtools.filewatch.FileSystemWatcher$1.run(FileSystemWatcher.java:150)
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
    at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:80)
    at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
    at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
    at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:93)
    at org.springframework.boot.devtools.remote.client.HttpHeaderInterceptor.intercept(HttpHeaderInterceptor.java:57)
    at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:85)
    at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:69)
    at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
    at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
    at org.springframework.boot.devtools.remote.client.ClassPathChangeUploader.onApplicationEvent(ClassPathChangeUploader.java:102)
    ... 12 more

在 docker 和 IntelliJ 中：

2016-07-06 12:49:29.141  INFO 17731 --- [   File Watcher] o.s.b.d.r.c.ClassPathChangeUploader      : Uploaded 1 class resource

logs 我看到上下文已重新加载。可能是什么问题？

【问题讨论】：

与docker:8888 的连接似乎不可靠。第一个Uploaded 1 class resource 无异常表示更改已成功上传。第二个，仅在两秒钟后，显示无法建立连接。在此过程中，在 Docker 中运行的应用程序会记录什么（如果有的话）？

@AndyWilkinson 在 Docker 中运行的第一个更新应用程序开始重新加载后。然后进行第二次更新，导致 Connection denied 因为当时没有上下文。

很抱歉让你绕圈子，现在我明白了发生了什么，很明显这是 DevTools 中的一个错误。我打开了github.com/spring-projects/spring-boot/issues/6339

【参考方案1】：

Spring boot 的 DevTools 中有一个 bug，这意味着如果您在由先前更改触发的重启仍在进行时对应用程序进行更改，则上传更改的尝试将失败。我认为我们可能需要更新 DevTools 以重试上传尝试。

与此同时，唯一的“解决方案”是在您看到由于java.net.ConnectException: Connection refused 而导致的故障时停止并重新启动您的RemoteSpringApplication。

【讨论】：

非常感谢！我能帮忙吗？另外：是否有任何估计的时间来提供修复？