Spring boot application main方法执行两次->端口已在使用中
来源：爱站网时间：2021-09-16编辑：网友分享
这是我第一次从头开始配置Spring Boot应用程序，并且有2天的时间我一直在困扰着这个问题。当我尝试启动应用程序时，它看起来像是...
问题描述
这是我第一次从头开始配置Spring Boot应用程序，并且有2天的时间我一直在困扰着这个问题。当我尝试启动该应用程序时，它看起来好像试图启动两次，并且每次我收到一个错误消息，即该端口已在使用中，但是该过程并未停止，并且如果我尝试使用邮递员调用终结点计算机，作品。
这是控制台输出：
Starting Gradle Daemon...
Connected to the target VM, address: '127.0.0.1:61857', transport: 'socket'
Gradle Daemon started in 1 s 473 ms
> Task :processResources UP-TO-DATE
> Task :compileJava UP-TO-DATE
> Task :classes UP-TO-DATE
Connected to the VM started by ':VcrawlPortalBackendApplication.main()' (localhost:61879). Open the debugger session tab
> Task :VcrawlPortalBackendApplication.main()
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.4.RELEASE)
2020-02-25 15:48:19.817 INFO 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : Starting VcrawlPortalBackendApplication on VOQCLUJWEBTS with PID 471912
2020-02-25 15:48:19.822 DEBUG 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : Running with Spring Boot v2.2.4.RELEASE, Spring v5.2.3.RELEASE
2020-02-25 15:48:19.823 INFO 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : The following profiles are active: dev
2020-02-25 15:48:22.237 DEBUG 471912 --- [ restartedMain] c.v.v.config.DatabaseConfiguration : Configuring Datasource
.........
2020-02-25 15:48:25.065 INFO 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : Started VcrawlPortalBackendApplication in 6.273 seconds (JVM running for 6.994)
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.4.RELEASE)
2020-02-25 15:48:25.178 INFO 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : Starting VcrawlPortalBackendApplication on VOQCLUJWEBTS with PID 471912
2020-02-25 15:48:25.179 DEBUG 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : Running with Spring Boot v2.2.4.RELEASE, Spring v5.2.3.RELEASE
2020-02-25 15:48:25.179 INFO 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : The following profiles are active: dev
2020-02-25 15:48:25.765 DEBUG 471912 --- [ restartedMain] c.v.v.config.DatabaseConfiguration : Configuring Datasource
2020-02-25 15:48:25.904 INFO 471912 --- [ restartedMain] c.v.v.VcrawlPortalBackendApplication : Running with Spring profile(s) : [dev]
2020-02-25 15:48:26.166 ERROR 471912 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Web server failed to start. Port 8187 was already in use.
Action:
Identify and stop the process that's listening on port 8187 or configure this application to listen on another port.
此日志都在同一运行中。
这是我的build.gradle文件：
plugins {
id 'org.springframework.boot' version '2.2.4.RELEASE'
id 'io.spring.dependency-management' version '1.0.9.RELEASE'
id 'java'
id 'war'
}
bootWar {
mainClassName = 'com.voquz.vcrawlportalbackend.VcrawlPortalBackendApplication'
excludeDevtools = true
}
springBoot {
mainClassName = 'com.voquz.vcrawlportalbackend.VcrawlPortalBackendApplication'
}
bootRun {
sourceResources sourceSets.main
if (System.getProperty('DEBUG', 'false') == 'true') {
jvmArgs '-Xdebug',
'-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=9009'
}
}
if (project.hasProperty('prod')) {
apply from: 'profile_prod.gradle'
} else if (project.hasProperty('uat')) {
apply from: 'profile_uat.gradle'
} else {
apply from: 'profile_dev.gradle'
}
group = 'com.voquz.vcrawl-portal-backend'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
implementation ('org.springframework.boot:spring-boot-starter-web') {
exclude group: 'org.springframework.boot', module: 'spring-boot-starter-tomcat'
}
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'org.liquibase:liquibase-core'
implementation 'com.fasterxml.jackson.datatype:jackson-datatype-hibernate4'
implementation 'org.hibernate:hibernate-core'
providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
testImplementation('org.springframework.boot:spring-boot-starter-test') {
exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
}
testImplementation 'org.springframework.security:spring-security-test'
compile group: 'com.microsoft.sqlserver', name: 'mssql-jdbc', version: '8.2.0.jre8'
compile 'com.github.sabomichal:liquibase-mssql:1.5'
compile group: 'com.hynnet', name: 'sqljdbc-chs', version: '4.0.2206.100'
}
compileJava.dependsOn(processResources)
clean {
delete "target"
}
task stage(dependsOn: 'bootRepackage') {
}
这里是开发配置文件的build.gradle文件：
ext {
logbackLoglevel = "DEBUG"
}
dependencies {
compile group: 'org.springframework.boot', name: 'spring-boot-devtools'
compile group: 'org.springframework.boot', name: 'spring-boot-starter-tomcat', version: '2.2.4.RELEASE'
}
bootRun {
args = ["--spring.profiles.active=dev"]
}
task setProdProperties(dependsOn: bootRun) {
doFirst {
System.setProperty('spring.profiles.active', 'dev')
}
}
processResources {
filesMatching('**/logback-spring.xml') {
filter {
it.replace('@logback.loglevel@', logbackLoglevel)
}
}
}
和主要班级：
@SpringBootApplication
@EnableConfigurationProperties({LiquibaseProperties.class})
public class VcrawlPortalBackendApplication {
private static final Logger log = LoggerFactory.getLogger(VcrawlPortalBackendApplication.class);
@Autowired
private Environment environment;
public static void main(String[] args) throws UnknownHostException {
SpringApplication app = new SpringApplication(VcrawlPortalBackendApplication.class);
SimpleCommandLinePropertySource source = new SimpleCommandLinePropertySource(args);
addDefaultProfile(app, source);
SpringApplication.run(VcrawlPortalBackendApplication.class, args);
Environment env = app.run(args).getEnvironment();
log.info("Access URLs:\n----------------------------------------------------------\n\t" +
"Local: \t\thttp://127.0.0.1:{}\n\t" +
"External: \thttp://{}:{}\n----------------------------------------------------------",
env.getProperty("server.port"),
InetAddress.getLocalHost().getHostAddress(),
env.getProperty("server.port"));
}
/**
* If no profile has been configured, set by default the "dev" profile.
*/
private static void addDefaultProfile(SpringApplication app, SimpleCommandLinePropertySource source) {
if (!source.containsProperty("spring.profiles.active") &&
!System.getenv().containsKey("SPRING_PROFILES_ACTIVE")) {
app.setAdditionalProfiles(Constants.SPRING_PROFILE_DEVELOPMENT);
}
}
@PostConstruct
public void initApplication() {
if (environment.getActiveProfiles().length == 0) {
log.warn("No Spring profile configured, running with default configuration");
} else {
log.info("Running with Spring profile(s) : {}", Arrays.toString(environment.getActiveProfiles()));
Collection activeProfiles = Arrays.asList(environment.getActiveProfiles());
if (activeProfiles.contains(Constants.SPRING_PROFILE_DEVELOPMENT) && activeProfiles.contains(Constants.SPRING_PROFILE_PRODUCTION)) {
log.error("You have misconfigured your application! " +
"It should not run with both the 'dev' and 'prod' profiles at the same time.");
}
if (activeProfiles.contains(Constants.SPRING_PROFILE_DEVELOPMENT) && activeProfiles.contains(Constants.SPRING_PROFILE_UAT)) {
log.error("You have misconfigured your application! " +
"It should not run with both the 'dev' and 'uat' profiles at the same time.");
}
if (activeProfiles.contains(Constants.SPRING_PROFILE_PRODUCTION) && activeProfiles.contains(Constants.SPRING_PROFILE_UAT)) {
log.error("You have misconfigured your application! " +
"It should not run with both the 'prod' and 'uat' profiles at the same time.");
}
}
}
}
我的想法是我的构建文件有问题，但找不到解决方案。有没有人遇到过同样的问题？有解决方案的主意吗？预先感谢。
思路一：
您两次调用SpringApplication::run静态方法。
首先使用SpringApplication.run(VcrawlPortalBackendApplication.class, args);及其来自初始化的SpringApplication实例Environment env = app.run(args).getEnvironment();的它们
思路二：
您的应用程序已在端口8187上开始执行。由于您已设置run方法的重复调用，因此它再次尝试在端口8187上开始执行。解决方案->删除运行函数的重复调用。
