使用 Intellij IDEA 重新加载远程 Spring Boot 应用程序的异常

Question

我正在尝试使用 spring devtools、 docker 和 IntelliJ设置远程 spring-boot 环境。一切从这篇文章开始。不幸的是，它随机失败，但有一个例外。下面是配置：

文件

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:8888spring 应用程序使用的 docker-machine 和端口的 IP在哪里。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，在对代码进行一些更改后，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

日志我看到上下文已重新加载。可能是什么问题？

Answer 1

Spring boot 的 DevTools 中存在一个错误，这意味着如果在由先前更改触发的重新启动仍在进行中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。

同时，唯一的“解决方案”是RemoteSpringApplication在您看到由于java.net.ConnectException: Connection refused.