使用spring-boot运行java应用程序，并在digitalocean上运行 [英] Running a java application with spring-boot, and gradle on digitalocean
本文介绍了使用spring-boot运行java应用程序，并在digitalocean上运行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我在eclipse中运行并访问localhost时，这可以正常工作。访问本地主机：端口＃提供所需的输出，但是我注意到eclipse的控制台日志和服务器上运行时的差异。
从eclipse： / p>
2016-01-24 09：42：56.245 INFO 7372 --- [main] Keen.KeenAPICallTester：启动KeenAPICallTester on ** ** - 使用PID 7372（C：\Users\ **** \workspace\ **** - ML\bin由C：\Users\ ***中的****启动） * \workspace\ **** - ML）/ pre>
2016-01-24 09：42：56.247 INFO 7372 --- [main] Keen.KeenAPICallTester：没有活动的配置文件设置，退回到默认配置文件：默认
2016-01-24 09：42：56.299 INFO 7372 --- [main] ationConfigEmbeddedWebApplicationContext：刷新org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@116af24：启动日期[Sun Jan 24 09:42： 56 EST 2016];根目录层次结构
2016-01-24 09：42：56.893 INFO 7372 --- [main] osbfsDefaultListableBeanFactory：用不同的定义覆盖bean'beanNameViewResolver'的bean定义：replace [Root bean：class [null ]。范围=;抽象= FALSE; lazyInit = FALSE; autowireMode = 3; dependencyCheck = 0; autowireCandidate = TRUE;初级= FALSE; factoryBeanName = org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration; factoryMethodName = beanNameViewResolver; initMethodName = NULL; destroyMethodName =（推断）;在[root bean：class [null]）中的类路径资源[org / springframework / boot / autoconfigure / web / ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration.class]]中定义。范围=;抽象= FALSE; lazyInit = FALSE; autowireMode = 3; dependencyCheck = 0; autowireCandidate = TRUE;初级= FALSE; factoryBeanName = org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter; factoryMethodName = beanNameViewResolver; initMethodName = NULL; destroyMethodName =（推断）;在类路径资源中定义[org / springframework / boot / autoconfigure / web / WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter.class]]
2016-01-24 09：42：57.492 INFO 7372 --- [main] sbcetTomcatEmbeddedServletContainer：Tomcat已初始化与端口：9011（http）
2016-01-24 09：42：57.502 INFO 7372 --- [main] o.apache.catalina.core.StandardService：启动服务Tomcat
2016 -01-24 09：42：57.503 INFO 7372 --- [main] org.apache.catalina.core.StandardEngine：启动Servlet引擎：Apache Tomcat / 8.0.30
2016-01-24 09:42： 57.599 INFO 7372 --- [ost-startStop-1] oaccC [Tomcat]。[localhost]。[/]：初始化Spring嵌入式WebApplicationContext
2016-01-24 09：42：57.599 INFO 7372 --- [ ost-startStop-1] osweb.context.ContextLoader：Root WebApplicationContext：初始化在1301 ms完成
2016-01-24 09：42：57.880 INFO 7372 --- [ost-startStop-1] osbceServletRegistrationBean：嘛pping servlet：'dispatcherServlet'到[/]
2016-01-24 09：42：57.883 INFO 7372 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'characterEncodingFilter' / *]
2016-01-24 09：42：57.884 INFO 7372 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'hiddenHttpMethodFilter'到：[/ *]
2016-01-24 09：42：57.884 INFO 7372 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'httpPutFormContentFilter'到：[/ *]
2016-01-24 09： 42：57.885 INFO 7372 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'requestContextFilter'到：[/ *]
2016-01-24 09：42：58.120 INFO 7372 - - [main] swsmmaRequestMappingHandlerAdapter：寻找@ControllerAdvice：org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@116af24：启动日期[Sun Jan 24 09:42:56 EST 2016];根据上下文层次结构
2016-01-24 09：42：58.183 INFO 7372 --- [main] swsmmaRequestMappingHandlerMapping：映射{[/ extractTest]，methods = [GET]，produce = [application / json] }到public java.lang.Object Keen.MLJSONResponseController.testExtractionRequest（）
2016-01-24 09：42：58.184 INFO 7372 --- [main] swsmmaRequestMappingHandlerMapping：映射{[/ inspectAllProjectsTest]，方法= [GET]，generate = [application / json]}到public java.lang.Object Keen.MLJSONResponseController.testInspectionRequest（）
2016-01-24 09：42：58.186 INFO 7372 --- [main] swsmmaRequestMappingHandlerMapping：将{[/ error]}映射到public org.springframework.http.ResponseEntity< java.util.Map< java.lang.String，java.lang.Object>>> org.springframework.boot.autoconfigure.web.BasicErrorController.error（javax.servlet.http.HttpServletRequest）
2016-01-24 09：42：58.186 INFO 7372 --- [main] swsmmaRequestMappingHandlerMapping：映射{ [/ error]，produce = [text / html]}到public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml（javax.servlet.http.HttpServletRequest，javax.servlet .http.HttpServletResponse）
2016-01-24 09：42：58.208 INFO 7372 --- [main] oswshandler.SimpleUrlHandlerMapping：映射URL路径[/ webjars / **]到类型为[class org。 springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-24 09：42：58.208 INFO 7372 --- [main] oswshandler.SimpleUrlHandlerMapping：映射URL路径[/ **]到类型为[ class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2016-01-24 09：42：58.246 INFO 7372 --- [main] oswshandler.Si mpleUrlHandlerMapping：映射的URL路径[/n/favicon.ico]到类型为[class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]的处理程序
2016-01-24 09：42：58.349 INFO 7372 - - [main] osjeaAnnotationMBeanExporter：在启动时注册JMX暴露的bean
2016-01-24 09：42：58.402 INFO 7372 --- [main] sbcetTomcatEmbeddedServletContainer：Tomcat在端口上启动：9011（http ）
2016-01-24 09：42：58.406 INFO 7372 --- [main] Keen.KeenAPICallTester：在2.445秒内启动KeenAPICallTester（JVM运行2.739）
从数字海洋：
09：22：11.190 INFO 29453 --- [main] Keen.KeenAPICallTester：使用PID 29453启动KeenAPICallTester on ****（/ root / java-ml / learn / build / classes / main由root / root / java启动-ml / learning）
2016-01-24 09：22：11.224 INFO 29453 --- [m ain] Keen.KeenAPICallTester：没有活动的配置文件设置，退回到默认配置文件：默认
2016-01-24 09：22：11.949 INFO 29453 --- [main] ationConfigEmbeddedWebApplicationContext：刷新org.springframework.boot.context .embedded.AnnotationConfigEmbeddedWebApplicationContext @ 8b87145：启动日期[Sun Jan 24 09:22:11 EST 2016];根目录层次结构
2016-01-24 09：22：16.874 INFO 29453 --- [main] osbfsDefaultListableBeanFactory：使用不同的定义覆盖bean'beanNameViewResolver'的bean定义：replace [Root bean：class [null ]。范围=;抽象= FALSE; lazyInit = FALSE; autowireMode = 3; dependencyCheck = 0; autowireCandidate = TRUE;初级= FALSE; factoryBeanName = org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration; factoryMethodName = beanNameViewResolver; initMethodName = NULL; destroyMethodName =（推断）;在[root bean：class [null]）中的类路径资源[org / springframework / boot / autoconfigure / web / ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration.class]]中定义。范围=;抽象= FALSE; lazyInit = FALSE; autowireMode = 3; dependencyCheck = 0; autowireCandidate = TRUE;初级= FALSE; factoryBeanName = org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter; factoryMethodName = beanNameViewResolver; initMethodName = NULL; destroyMethodName =（推断）;在类路径资源中定义[org / springframework / boot / autoconfigure / web / WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter.class]]
2016-01-24 09：22：20.350 INFO 29453 --- [main] sbcetTomcatEmbeddedServletContainer：与港口：80（http）
2016-01-24 09：22：20.448 INFO 29453 --- [main] o.apache.catalina.core.StandardService：启动服务Tomcat
2016 -01-24 09：22：20.457 INFO 29453 --- [main] org.apache.catalina.core.StandardEngine：启动Servlet引擎：Apache Tomcat / 8.0.30
2016-01-24 09:22： 21.015 INFO 29453 --- [ost-startStop-1] oaccC [Tomcat]。[localhost]。[/]：初始化Spring嵌入式WebApplicationContext
2016-01-24 09：22：21.016 INFO 29453 --- [ ost-startStop-1] osweb.context.ContextLoader：Root WebApplicationContext：初始化在9086 ms中完成
2016-01-24 09：22：22.582 INFO 29453 --- [ost-startStop-1] osbceServletRegistrationBean ：映射servlet：'dispatcherServlet'到[/]
2016-01-24 09：22：22.613 INFO 29453 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'characterEncodingFilter' [/ *]
2016-01-24 09：22：22.636 INFO 29453 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'hiddenHttpMethodFilter'到：[/ *]
2016-01-24 09：22：22.637 INFO 29453 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'httpPutFormContentFilter'到：[/ *]
2016-01-24 09 ：22：22.637 INFO 29453 --- [ost-startStop-1] osbcembedded.FilterRegistrationBean：映射过滤器：'requestContextFilter'到：[/ *]
我的猜测是，由于某种原因，我的数字海洋服务器不是很好玩与Tomcat或某事。我通过
ufw命令打开端口，检查iptables，安装的apache2（我甚至不知道我是否必须诚实），并确保有配置设置为接受8080和8000端口的出站和入站请求。
我注意到我的请求方法没有被映射，这让我觉得有一些依赖问题。这是我的
build.gradle作为参考。buildscript {
存储库{
mavenCentral（）
}
依赖关系{
classpath（org.springframework.boot：spring-boot-gradle-plugin：1.3.1.RELEASE）
}
}
应用插件：'java'
应用插件：'应用'
应用插件：'eclipse'
应用插件：'idea'
应用插件：'spring-boot'
mainClassName =Keen.KeenAPICallTester
applicationDefaultJvmArgs = [--server.port = 8000 ]
jar {
baseName ='**** - ML'
version ='0.1.0'
}
存储库{
mavenCentral（）
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
依赖项{
compile（org.springframework.boot：spring-boot-starter-web）
testCompile（junit：junit）
编译fileTree（dir：'libs'，include：' * .jar'）
}
任务包装（类型：Wrapper）{
gradleVersion ='2.3'
}
任务（runSimple，dependsOn：'classes '，键入：JavaExec）{
main ='Keen.KeenAPICallTester'
classpath = sourceSets.main.runtimeClasspath
args'--server.port = 8000'
}
我正在处理这个问题有什么问题吗？我还有一个
runSimple命令，以便我可以玩JVM端口运行，但它没有什么区别，即使我把它设置为80，直接到默认的数字海洋IP地址。
我以前在数字海洋上运行过应用程序，通常是通过
ufw并在端口上运行应用程序，然后通过互联网访问它。但是有一些事情正在发生，我想了解。解决方案似乎应用程序被卡住，因为它可能等待
/ dev / random（阻止设备，可能会干涸）。
您可以使用
/ dev / urandom而不是启动你的应用程序传递JVM-param-Djava.security.egd = file：/ dev /./ urandom。
此外，为了深入研究这样奇怪的问题，诸如
jstack或strace可能有帮助。I am trying to build a restful service with eclipse, java, gradle, spring-boot and host it on a digital ocean server. I want to get a JSON response when I access the digital ocean url on a specific port or something, so I can do 123.456.78:90 and see JSON in the browser.
When I run this in eclipse and access localhost, this works fine. Accessing localhost:port# gives the desired output, but I'm noticing differences in the console log from eclipse and when I run it on the server.
From eclipse:
2016-01-24 09:42:56.245 INFO 7372 --- [ main] Keen.KeenAPICallTester : Starting KeenAPICallTester on ****-THINK with PID 7372 (C:\Users\****\workspace\****-ML\bin started by **** in C:\Users\****\workspace\****-ML) 2016-01-24 09:42:56.247 INFO 7372 --- [ main] Keen.KeenAPICallTester : No active profile set, falling back to default profiles: default 2016-01-24 09:42:56.299 INFO 7372 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@116af24: startup date [Sun Jan 24 09:42:56 EST 2016]; root of context hierarchy 2016-01-24 09:42:56.893 INFO 7372 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'beanNameViewResolver' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]] 2016-01-24 09:42:57.492 INFO 7372 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 9011 (http) 2016-01-24 09:42:57.502 INFO 7372 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat 2016-01-24 09:42:57.503 INFO 7372 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.30 2016-01-24 09:42:57.599 INFO 7372 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2016-01-24 09:42:57.599 INFO 7372 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1301 ms 2016-01-24 09:42:57.880 INFO 7372 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/] 2016-01-24 09:42:57.883 INFO 7372 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 2016-01-24 09:42:57.884 INFO 7372 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2016-01-24 09:42:57.884 INFO 7372 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2016-01-24 09:42:57.885 INFO 7372 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*] 2016-01-24 09:42:58.120 INFO 7372 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@116af24: startup date [Sun Jan 24 09:42:56 EST 2016]; root of context hierarchy 2016-01-24 09:42:58.183 INFO 7372 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/extractionTest],methods=[GET],produces=[application/json]}" onto public java.lang.Object Keen.MLJSONResponseController.testExtractionRequest() 2016-01-24 09:42:58.184 INFO 7372 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/inspectAllProjectsTest],methods=[GET],produces=[application/json]}" onto public java.lang.Object Keen.MLJSONResponseController.testInspectionRequest() 2016-01-24 09:42:58.186 INFO 7372 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2016-01-24 09:42:58.186 INFO 7372 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2016-01-24 09:42:58.208 INFO 7372 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2016-01-24 09:42:58.208 INFO 7372 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2016-01-24 09:42:58.246 INFO 7372 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2016-01-24 09:42:58.349 INFO 7372 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2016-01-24 09:42:58.402 INFO 7372 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 9011 (http) 2016-01-24 09:42:58.406 INFO 7372 --- [ main] Keen.KeenAPICallTester : Started KeenAPICallTester in 2.445 seconds (JVM running for 2.739)From Digital Ocean:
2016-01-24 09:22:11.190 INFO 29453 --- [ main] Keen.KeenAPICallTester : Starting KeenAPICallTester on **** with PID 29453 (/root/java-ml/learning/build/classes/main started by root in /root/java-ml/learning) 2016-01-24 09:22:11.224 INFO 29453 --- [ main] Keen.KeenAPICallTester : No active profile set, falling back to default profiles: default 2016-01-24 09:22:11.949 INFO 29453 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@8b87145: startup date [Sun Jan 24 09:22:11 EST 2016]; root of context hierarchy 2016-01-24 09:22:16.874 INFO 29453 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'beanNameViewResolver' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]] 2016-01-24 09:22:20.350 INFO 29453 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 80 (http) 2016-01-24 09:22:20.448 INFO 29453 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat 2016-01-24 09:22:20.457 INFO 29453 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.30 2016-01-24 09:22:21.015 INFO 29453 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2016-01-24 09:22:21.016 INFO 29453 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 9086 ms 2016-01-24 09:22:22.582 INFO 29453 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/] 2016-01-24 09:22:22.613 INFO 29453 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 2016-01-24 09:22:22.636 INFO 29453 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2016-01-24 09:22:22.637 INFO 29453 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2016-01-24 09:22:22.637 INFO 29453 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]My guess is that for some reason my digital ocean server isn't playing nice with Tomcat or something. I opened ports via the
ufwcommand, checked iptables, installed apache2 (I don't even know if I had to to be honest) and made sure that there were configurations set to accept outbound and inbound requests in port 8080 and 8000.I noticed that my request methods are not getting mapped, which makes me think that there is some dependency problem. Here is my
build.gradlefor reference.buildscript { repositories { mavenCentral() } dependencies { classpath("org.springframework.boot:spring-boot-gradle-plugin:1.3.1.RELEASE") } } apply plugin: 'java' apply plugin: 'application' apply plugin: 'eclipse' apply plugin: 'idea' apply plugin: 'spring-boot' mainClassName = "Keen.KeenAPICallTester" applicationDefaultJvmArgs = ["--server.port=8000"] jar { baseName = '****-ML' version = '0.1.0' } repositories { mavenCentral() } sourceCompatibility = 1.8 targetCompatibility = 1.8 dependencies { compile("org.springframework.boot:spring-boot-starter-web") testCompile("junit:junit") compile fileTree(dir: 'libs', include: '*.jar') } task wrapper(type: Wrapper) { gradleVersion = '2.3' } task(runSimple, dependsOn: 'classes', type: JavaExec) { main = 'Keen.KeenAPICallTester' classpath = sourceSets.main.runtimeClasspath args '--server.port=8000' }Is there something wrong with the way I'm handling this? I also have a
runSimplecommand so that I could play with the JVM port run, but it makes no difference, even if I set it to 80 and go straight to the default digital ocean IP address.I've run applications on digital ocean before and usually it was as simple as opening a specific port via
ufwand running the application on the port, then accessing it via the internet. But there's something under the hood that's going on that I would like to understand.解决方案Seems like the application is stuck because it might be waiting for
/dev/random(blocking device, might have run dry).You could use
/dev/urandominstead by starting your application passing the JVM-param-Djava.security.egd=file:/dev/./urandom.See Avoiding JVM Delays Caused by Random Number Generation
Furthermore, to drill down such weird issues, tools such as
jstackorstracemight be of help.这篇关于使用spring-boot运行java应用程序，并在digitalocean上运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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