春天開機webflux應用程序將無法啓動IllegalStateException異常

這裏是我的build.gradle春天開機webflux應用程序將無法啓動IllegalStateException異常

buildscript { 
    ext { 
     springBootVersion = '2.0.0.M2' 
    } 
    repositories { 
     mavenCentral() 
     jcenter() 
     maven { url "https://repo.spring.io/snapshot" } 
     maven { url "https://repo.spring.io/milestone" } 
    } 
    dependencies { 
     classpath "org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}" 
    } 
} 

apply plugin: 'java' 
apply plugin: 'org.springframework.boot' 
apply plugin: 'io.spring.dependency-management' 

sourceCompatibility = 1.8 

repositories { 
    mavenCentral() 
    jcenter() 
    maven { url "https://repo.spring.io/snapshot" } 
    maven { url "https://repo.spring.io/milestone" } 
} 

dependencies { 
    compile 'org.springframework.boot:spring-boot-starter-security', 
      'org.springframework.boot:spring-boot-starter-mail', 
      'org.springframework.boot:spring-boot-starter-validation', 
      'org.springframework.boot:spring-boot-starter-webflux', 
      // support libs 
      'commons-io:commons-io:2.5', 
      'commons-codec:commons-codec:1.10', 
      'org.apache.commons:commons-lang3:3.4', 
      'org.apache.commons:commons-collections4:4.1', 
      //validation 
      'javax.validation:validation-api:1.1.0.Final' 
    compileOnly 'org.springframework.boot:spring-boot-configuration-processor', 
      'org.projectlombok:lombok' 
    testCompile 'org.springframework.boot:spring-boot-starter-test' 
}

當我試圖用java.lang.IllegalStateException: java.lang.NullPointerException
堆棧跟蹤運行的應用程序失敗：通過開始產生

java.lang.IllegalStateException: java.lang.NullPointerException 
    at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.stopAndReleaseReactiveWebServer(ReactiveWebServerApplicationContext.java:152) ~[spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:52) ~[spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:386) [spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at com.getcredit.bankscraper.Application.main(Application.java:10) [main/:na] 
Caused by: java.lang.NullPointerException: null 
    at org.springframework.boot.web.embedded.netty.NettyWebServer.stop(NettyWebServer.java:113) ~[spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.stopAndReleaseReactiveWebServer(ReactiveWebServerApplicationContext.java:148) ~[spring-boot-2.0.0.M2.jar:2.0.0.M2] 
    ... 7 common frames omitted

項目。 spring.io網站。

來源

2017-06-16 Slava Gornostal

你可以發佈代碼，在哪裏創建你的netty服務器和處理器適配器 –

當你切換到'2.0.0.M1' Spring Boot時，你有同樣的問題嗎？ – ledniov

不幸的是，NullPointerException掩蓋了實際的失敗。如果你在'ReactiveWebServerApplicationContext'的第52行用一個斷點調試你的應用程序（https://github.com/spring-projects/spring-boot/blob/v2.0.0.M2/spring-boot/src/main/ java/org/springframework/boot/web/reactive/context/ReactiveWebServerApplicationContext.java＃L52）你應該能夠看到什麼導致你的應用程序無法啓動 –

經過一些測試，我發現了我的問題。這是用@PostConstruct註解的我的bean的init方法中的一個NPE異常。你可以這樣重現這個問題：

@Component 
class Test { 

    String str; 

    @PostConstruct 
    private void init() { 
     System.out.println(str.length()); 
    } 
}

我不明白爲什麼春天拋出如此不清楚的例外。

來源

2017-06-18 12:36:45

春天開機webflux應用程序將無法啓動IllegalStateException異常

回答

相關問題