如何在Spring Boot应用程序启动时启动H2 TCP服务器？（spring boot启动端口）

25-02-12 16

在这篇文章中，我们将为您详细介绍如何在SpringBoot应用程序启动时启动H2TCP服务器？的内容，并且讨论关于springboot启动端口的相关问题。此外，我们还会涉及一些关于java–sprin

在这篇文章中，我们将为您详细介绍如何在Spring Boot应用程序启动时启动H2 TCP服务器？的内容，并且讨论关于spring boot启动端口的相关问题。此外，我们还会涉及一些关于java – spring-boot应用程序无法启动、java – Spring-boot应用程序无法在docker内启动时启动、java – 在SpringBoot应用程序启动时捕获Hibernate异常？、java – 测试启动Spring-boot应用程序的知识，以帮助您更全面地了解这个主题。

本文目录一览：

如何在Spring Boot应用程序启动时启动H2 TCP服务器？（spring boot启动端口）
java – spring-boot应用程序无法启动
java – Spring-boot应用程序无法在docker内启动时启动
java – 在SpringBoot应用程序启动时捕获Hibernate异常？
java – 测试启动Spring-boot应用程序

如何在Spring Boot应用程序启动时启动H2 TCP服务器？（spring boot启动端口）

通过将以下行添加到SpringBootServletInitializer主方法中，可以在将应用程序作为Spring Boot应用程序运行时启动H2
TCP服务器（文件中的数据库）：

@SpringBootApplicationpublic class NatiaApplication extends SpringBootServletInitializer {    public static void main(String[] args) {        Server.createTcpServer().start();        SpringApplication.run(NatiaApplication.class, args);    }}

但是，如果我在Tomcat上运行WAR文件，则该文件将不起作用，因为未调用main方法。有没有更好的通用方法，如何在初始化bean之前在应用程序启动时启动H2
TCP服务器？我使用Flyway（autoconfig），它在“连接被拒绝：连接”失败，可能是因为服务器未运行。谢谢。

答案1

小编典典

这个解决方案对我有用。如果该应用程序作为Spring
Boot应用程序运行，并且在Tomcat上运行，它将启动H2服务器。将H2服务器创建为Bean无效，因为Flyway
Bean是较早创建的，并且在“连接被拒绝”时失败。

@SpringBootApplication@Logpublic class NatiaApplication extends SpringBootServletInitializer {    public static void main(String[] args) {        startH2Server();        SpringApplication.run(NatiaApplication.class, args);    }    @Override    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {        startH2Server();        return application.sources(NatiaApplication.class);    }    private static void startH2Server() {        try {            Server h2Server = Server.createTcpServer().start();            if (h2Server.isRunning(true)) {                log.info("H2 server was started and is running.");            } else {                throw new RuntimeException("Could not start H2 server.");            }        } catch (SQLException e) {            throw new RuntimeException("Failed to start H2 server: ", e);        }    }}

java – spring-boot应用程序无法启动

我最近开始使用 spring-boot开发一个web应用程序,anf,按照官方网站上的指南,设法创建这两个文件：

的pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>spring</groupId>
  <artifactId>app</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>app</name>
  <url>http://maven.apache.org</url>

  <properties>
    <start-class>com.spring.app.Application</start-class>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.1.8.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>

Application.java

@Configuration
@EnableAutoConfiguration
@ComponentScan
public class Application {

    public static void main(String[] args) {
        ApplicationContext ctx = SpringApplication.run(Application.class,args);

        System.out.println("Let's inspect the beans provided by Spring Boot:");

        String[] beanNames = ctx.getBeanDeFinitionNames();
        Arrays.sort(beanNames);
        for (String beanName : beanNames) {
            System.out.println(beanName);
        }
    }

}

但是当我尝试用java -jar appname运行应用程序时,我得到错误：找不到主类：com.spring.app.Application.程序将退出,并在终端：线程“main”中的异常java.lang.NoClassDefFoundError：com / spring / app / Application.

我做错了什么？

解决方法

你的pom.xml中有2件事要做.

首先将start-class更改为您的应用程序类.
第二,将超酷的Spring Boot maven builder添加到你的pom中.

像这样的东西：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.sample</groupId>
<artifactId>beanlist</artifactId>
<version>1.0-SNAPSHOT</version>

<properties>
    <start-class>com.sample.Application</start-class>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.1.8.RELEASE</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

</project

然后使用“mvn install”创建你的jar.你的代码运行得很好.

java – Spring-boot应用程序无法在docker内启动时启动

我在docker容器中运行一个简单的spring-boot应用程序.在启动时是否以java -jar MY_JAR.jar或mvn spring-boot：run开始运行应用程序将始终挂起以下点：

2014-12-22 23:26:58.957  INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

这是捕获,我只能在DigitalOcean(1cpu,1GB MEM)的Ubuntu 14.04盒子上重现这一点,即使它在容器内运行.在我的本地机器(mac)上一切正常.

Dockerfile：

FROM java:8
ADD target/MY_SERVICE-1.0-SNAPSHOT.jar /data/svc.jar
EXPOSE 8080
CMD ["java", "-jar", "/data/svc.jar"]

我试过的事情

>为JVM提供更多内存(占机器总数的75％)
>根据建议here安装已伪造的库
>每个其他版本的java我都可以得到我的动手

有什么建议么？

谢谢你的帮助.

整个日志(以–debug开头)：

[Text Art Omitted]

 :: Spring Boot ::       (v1.1.10.RELEASE)

2014-12-22 19:22:58.375  INFO 20816 --- [           main] com.spectrom.uploadService.Main          : Starting Main on spectrom-services with PID 20816 (/root/spectrom-upload-service/target/upload-service-1.0-SNAPSHOT.jar started by root in /root/spectrom-upload-service)
2014-12-22 19:22:58.392 DEBUG 20816 --- [           main] o.s.boot.SpringApplication               : Loading source class com.spectrom.uploadService.Main
2014-12-22 19:22:58.671 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'file:./config/application.yaml' resource not found
2014-12-22 19:22:58.673 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'file:./config/application.properties' resource not found
2014-12-22 19:22:58.674 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'file:./config/application.yml' resource not found
2014-12-22 19:22:58.675 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'file:./application.yaml' resource not found
2014-12-22 19:22:58.675 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'file:./application.properties' resource not found
2014-12-22 19:22:58.676 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'file:./application.yml' resource not found
2014-12-22 19:22:58.677 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'classpath:/config/application.yaml' resource not found
2014-12-22 19:22:58.678 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'classpath:/config/application.properties' resource not found
2014-12-22 19:22:58.679 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'classpath:/config/application.yml' resource not found
2014-12-22 19:22:58.679 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'classpath:/application.yaml' resource not found
2014-12-22 19:22:58.680 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Loaded config file 'classpath:/application.properties'
2014-12-22 19:22:58.681 DEBUG 20816 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Skipped config file 'classpath:/application.yml' resource not found
2014-12-22 19:22:58.693  INFO 20816 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@ddd51a7: startup date [Mon Dec 22 19:22:58 EST 2014]; root of context hierarchy
2014-12-22 19:22:58.708 DEBUG 20816 --- [           main] ationConfigEmbeddedWebApplicationContext : Bean factory for org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@ddd51a7: org.springframework.beans.factory.support.DefaultListablebeanfactory@47649f10: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalrequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,main]; root of factory hierarchy
2014-12-22 19:23:00.964  INFO 20816 --- [           main] o.s.b.f.s.DefaultListablebeanfactory     : Overriding bean deFinition for bean 'beanNameViewResolver': 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]]
2014-12-22 19:23:02.480 DEBUG 20816 --- [           main] ationConfigEmbeddedWebApplicationContext : Unable to locate MessageSource with name 'messageSource': using default [org.springframework.context.support.DelegatingMessageSource@177df6c1]
2014-12-22 19:23:02.481 DEBUG 20816 --- [           main] ationConfigEmbeddedWebApplicationContext : Using ApplicationEventMulticaster [org.springframework.context.event.SimpleApplicationEventMulticaster@4ed304f3]
2014-12-22 19:23:03.647 DEBUG 20816 --- [           main] .t.TomcatEmbeddedServletContainerFactory : Code archive: /root/spectrom-upload-service/target/upload-service-1.0-SNAPSHOT.jar
2014-12-22 19:23:03.648 DEBUG 20816 --- [           main] .t.TomcatEmbeddedServletContainerFactory : Code archive: /root/spectrom-upload-service/target/upload-service-1.0-SNAPSHOT.jar
2014-12-22 19:23:03.648 DEBUG 20816 --- [           main] .t.TomcatEmbeddedServletContainerFactory : None of the document roots [src/main/webapp, public, static] point to a directory and will be ignored.
2014-12-22 19:23:03.691  INFO 20816 --- [           main] .t.TomcatEmbeddedServletContainerFactory : Server initialized with port: 8080
2014-12-22 19:23:04.855  INFO 20816 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2014-12-22 19:23:04.856  INFO 20816 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/7.0.57
2014-12-22 19:23:05.008  INFO 20816 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2014-12-22 19:23:05.009  INFO 20816 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 6326 ms
2014-12-22 19:23:06.928  INFO 20816 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean        : Mapping servlet: 'dispatcherServlet' to [/]
2014-12-22 19:23:06.933  INFO 20816 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

^ c之后：

^C2014-12-22 19:24:28.771  INFO 20816 --- [       Thread-2] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@ddd51a7: startup date [Mon Dec 22 19:22:58 EST 2014]; root of context hierarchy
2014-12-22 19:24:28.815  WARN 20816 --- [       Thread-2] ationConfigEmbeddedWebApplicationContext : Exception thrown from LifecycleProcessor on context close

java.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@ddd51a7: startup date [Mon Dec 22 19:22:58 EST 2014]; root of context hierarchy
    at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:359)
    at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:890)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.doClose(EmbeddedWebApplicationContext.java:141)
    at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:811)

挂起时的线程转储：

2014-12-23 01:09:58
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode):

"localhost-startStop-1" #13 daemon prio=5 os_prio=0 tid=0x00007f56c431a800 nid=0x12 runnable [0x00007f56e0bec000]
   java.lang.Thread.State: RUNNABLE
    at java.io.FileInputStream.readBytes(Native Method)
    at java.io.FileInputStream.read(FileInputStream.java:246)
    at sun.security.provider.SeedGenerator$URLSeedGenerator.getSeedBytes(SeedGenerator.java:539)
    at sun.security.provider.SeedGenerator.generateSeed(SeedGenerator.java:144)
    at sun.security.provider.SecureRandom$SeederHolder.<clinit>(SecureRandom.java:203)
    at sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:221)
    - locked <0x00000000f10478f8> (a sun.security.provider.SecureRandom)
    at java.security.SecureRandom.nextBytes(SecureRandom.java:457)
    - locked <0x00000000f1047c18> (a java.security.SecureRandom)
    at java.security.SecureRandom.next(SecureRandom.java:480)
    at java.util.Random.nextInt(Random.java:329)
    at org.apache.catalina.util.SessionIdGenerator.createSecureRandom(SessionIdGenerator.java:246)
    at org.apache.catalina.util.SessionIdGenerator.getRandomBytes(SessionIdGenerator.java:183)
    at org.apache.catalina.util.SessionIdGenerator.generateSessionId(SessionIdGenerator.java:153)
    at org.apache.catalina.session.ManagerBase.startInternal(ManagerBase.java:573)
    at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:485)
    - locked <0x00000000f0fa82e0> (a org.apache.catalina.session.StandardManager)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    - locked <0x00000000f0fa82e0> (a org.apache.catalina.session.StandardManager)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5501)
    - locked <0x00000000f68e5d68> (a org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedContext)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    - locked <0x00000000f68e5d68> (a org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedContext)
    at org.apache.catalina.core.ContainerBase$startChild.call(ContainerBase.java:1575)
    at org.apache.catalina.core.ContainerBase$startChild.call(ContainerBase.java:1565)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"Tomcat-startStop-1" #12 daemon prio=5 os_prio=0 tid=0x00007f56c8405000 nid=0x11 waiting on condition [0x00007f56f4103000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000000f69aa980> (a java.util.concurrent.FutureTask)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
    at java.util.concurrent.FutureTask.get(FutureTask.java:191)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    - locked <0x00000000f68505c0> (a org.apache.catalina.core.StandardHost)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)
    - locked <0x00000000f68505c0> (a org.apache.catalina.core.StandardHost)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    - locked <0x00000000f68505c0> (a org.apache.catalina.core.StandardHost)
    at org.apache.catalina.core.ContainerBase$startChild.call(ContainerBase.java:1575)
    at org.apache.catalina.core.ContainerBase$startChild.call(ContainerBase.java:1565)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

"DestroyJavaVM" #10 prio=5 os_prio=0 tid=0x00007f56f0009800 nid=0x7 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"main" #9 prio=5 os_prio=0 tid=0x00007f56f0159800 nid=0x10 waiting on condition [0x00007f56f4cf0000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000000f69aac08> (a java.util.concurrent.FutureTask)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
    at java.util.concurrent.FutureTask.get(FutureTask.java:191)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    - locked <0x00000000f68d1648> (a org.apache.catalina.core.StandardEngine)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
    - locked <0x00000000f68d1648> (a org.apache.catalina.core.StandardEngine)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    - locked <0x00000000f68d1648> (a org.apache.catalina.core.StandardEngine)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    - locked <0x00000000f68d1648> (a org.apache.catalina.core.StandardEngine)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    - locked <0x00000000f6850418> (a org.apache.catalina.core.StandardService)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
    - locked <0x00000000f6850590> (a [Lorg.apache.catalina.Service;)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    - locked <0x00000000f683f5d8> (a org.apache.catalina.core.StandardServer)
    at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:85)
    - locked <0x00000000f68c4660> (a org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:74)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:377)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:153)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:148)
    - locked <0x00000000f5dd9708> (a org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:121)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)
    - locked <0x00000000f5de2550> (a java.lang.Object)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
    at com.spectrom.uploadService.Main.main(Main.java:17)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
    at java.lang.Thread.run(Thread.java:745)

"Service Thread" #7 daemon prio=9 os_prio=0 tid=0x00007f56f00cd000 nid=0xe runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C1 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x00007f56f00ca000 nid=0xd waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x00007f56f00c8000 nid=0xc waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal dispatcher" #4 daemon prio=9 os_prio=0 tid=0x00007f56f00c6000 nid=0xb waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00007f56f009a000 nid=0xa in Object.wait() [0x00007f56f5500000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000f5bb8068> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:142)
    - locked <0x00000000f5bb8068> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:158)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" #2 daemon prio=10 os_prio=0 tid=0x00007f56f0097800 nid=0x9 in Object.wait() [0x00007f56f5601000]
   java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000000f5bb8220> (a java.lang.ref.Reference$Lock)
    at java.lang.Object.wait(Object.java:502)
    at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:157)
    - locked <0x00000000f5bb8220> (a java.lang.ref.Reference$Lock)

"VM Thread" os_prio=0 tid=0x00007f56f0090800 nid=0x8 runnable

"VM Periodic Task Thread" os_prio=0 tid=0x00007f56f00dc800 nid=0xf waiting on condition

JNI global references: 29

Heap
 def new generation   total 13696K, used 12232K [0x00000000f2014-12-22 23:26:58.957  INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

00, 0x00000000f14d0000, 0x00000000f5950000)

  eden space 12224K,  88% used [0x00000000f
2014-12-22 23:26:58.957  INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

00, 0x00000000f1082050, 0x00000000f11f0000)

  from space 1472K, 100% used [0x00000000f11f0000, 0x00000000f1360000, 0x00000000f1360000)

  to   space 1472K,   0% used [0x00000000f1360000, 0x00000000f1360000, 0x00000000f14d0000)

 tenured generation   total 30240K, used 20916K [0x00000000f5950000, 0x00000000f76d8000, 0x0000000100000000)

   the space 30240K,  69% used [0x00000000f5950000, 0x00000000f6dbd1b0, 0x00000000f6dbd200, 0x00000000f76d8000)

 Metaspace       used 23431K, capacity 23620K, committed 23728K, reserved 1071104K

  class space    used 2909K, capacity 2974K, committed 2992K, reserved 1048576K

解决方法:

得到它了！一旦我安装在主机上,该过程立即向前移动,并且弹簧启动正常.一旦我对docker如何与主机上的hasged交互进行更多研究,我将发布更多内容.

总之,在主机上发出的以下命令将解决问题：

apt-get install haveged -y

如果有人对此有详细的了解,请随时发布！

我目前还不了解的是,为什么主机需要额外的代码,并且所有东西都没有在docker容器中被隔离.

java – 在SpringBoot应用程序启动时捕获Hibernate异常？

我正在尝试使用 Spring Boot 1.2.6和HibernateJpaAutoConfiguration.它很棒;这就是它“神奇地”由entityManager创建,并使用我的spring.jpa.*属性为我开箱即用.

但是,在数据库错误(凭据无效,数据库无法访问等)的情况下,我找不到一种在启动时捕获Hibernate异常的简洁方法.

我想我可以捕获所有BeanCreationException并检查根本原因,但这似乎是一个非常黑客：

ConfigurableApplicationContext context;
    try {
        SpringApplication app = new SpringApplication(Application.class);
        context = app.run(args);
    } catch (Exception e) {
        // check if it is a DB error.  
        if( ExceptionUtils.getRootCause(e) instanceof( HibernateException ) ){
            System.out.println( "You are having trouble with the DB: " + ExceptionUtils.getRootCauseMessage(e) );
        }
    }
    finally{
        // finished so close the context
        if( context != null )
            context.close();
    }

在不失去使用自动配置的能力的情况下,是否有更干净/更简洁的方法？另外,如果没有解析错误消息,有没有办法确定Hibernate / DB错误是什么(即：无效的信用证,未经验证的数据库等).

解决方法

您可以尝试捕获JDBCConnectionException,而不是捕获非常通用的HibernateException.这是用于数据库连接问题的HibernateException的子类(包括不正确的数据库设置).

https://docs.jboss.org/hibernate/orm/4.3/javadocs/org/hibernate/exception/JDBCConnectionException.html

java – 测试启动Spring-boot应用程序

我有一个JUnit测试,在测试后启动一个 spring-boot应用程序(在我的例子中,主类是 SpringTestDemoApp)：

@WebIntegrationTest
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = SpringTestDemoApp.class)
public class SpringTest {

    @Test
    public void test() {
        // Test http://localhost:8080/ (with Selenium)
    }
}

使用spring-boot 1.3.3.RELEASE一切正常.尽管如此,注释@WebIntegrationTest和@SpringApplicationConfiguration已在spring-boot 1.5.2.RELEASE中删除.我试图将代码重构为新版本,但我无法做到.通过以下测试,我的应用程序在测试之前未启动,http://localhost:8080返回404：

@RunWith(springrunner.class)
@SpringBoottest(classes = SpringTestDemoApp.class)
@WebAppConfiguration
public class SpringTest {

    @Test
    public void test() {
        // The same test than before
    }

}

如何重构我的测试以使其在spring-boot 1.5中工作？

解决方法

@SpringBoottest中的webEnvironment选项非常重要.它可以采用NONE,MOCK,RANDOM_PORT,DEFINED_PORT等值.

> NONE只会创建spring bean而不是任何模拟servlet环境.
> MOCK将创建spring bean和模拟servlet环境.
> RANDOM_PORT将在随机端口上启动实际的servlet容器;这可以使用@LocalServerPort自动装配.
> DEFINED_PORT将获取属性中定义的端口并使用它启动服务器.

如果未定义任何webEnvironment,则默认值为RANDOM_PORT.所以应用程序可能会在不同的端口为您启动.

尝试将其覆盖为DEFINED_PORT,或尝试自动装配端口号并尝试在该端口上运行测试.

关于如何在Spring Boot应用程序启动时启动H2 TCP服务器？和spring boot启动端口的介绍已经告一段落，感谢您的耐心阅读，如果想了解更多关于java – spring-boot应用程序无法启动、java – Spring-boot应用程序无法在docker内启动时启动、java – 在SpringBoot应用程序启动时捕获Hibernate异常？、java – 测试启动Spring-boot应用程序的相关信息，请在本站寻找。

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