java - 尝试通过嵌入式 Jetty 服务器运行 Ktor 应用程序时如何避免 java.lang.ExceptionInInitializerError？

Question

我正在通过嵌入式 Jetty 服务器运行我的 Ktor Web 应用程序。该应用程序在 IDE 中运行良好。但是，一旦我用 shadowJar 打包并运行生成的 fat jar，Jetty 服务器就会遇到 NoClassDefFoundError。我相信 NoClassDefFoundError 是由 ExceptionInInitializerError 引起的，这是由于 PreEncodedHttpField 内部的 Jetty 静态初始化内部的 ArrayIndexOutOfBoundsException 引起的。IDE内部怎么不会出现这个错误？从 fat jar 运行 Ktor 应用程序时如何避免它？

02-06-2018 00:27:59.093 [qtp859617558-17] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.093 [qtp859617558-24] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.099 [qtp859617558-26] DEBUG org.eclipse.jetty.io.IdleTimeout - SocketChannelEndPoint@2d8b0948{/0:0:0:0:0:0:0:1:50406<->/0:0:0:0:0:0:0:1:9000,OPEN,fill=-,flush=-,to=10/30000}{io=0/0,kio=0,kro=0}-><null> idle timeout check, elapsed: 6 ms, remaining: 29994 ms
02-06-2018 00:27:59.099 [qtp859617558-17] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.099 [qtp859617558-24] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.099 [qtp859617558-26] DEBUG o.eclipse.jetty.io.AbstractEndPoint - onOpen SocketChannelEndPoint@2d8b0948{/0:0:0:0:0:0:0:1:50406<->/0:0:0:0:0:0:0:1:9000,OPEN,fill=-,flush=-,to=15/30000}{io=0/0,kio=0,kro=0}-><null>
02-06-2018 00:27:59.099 [qtp859617558-17] DEBUG o.e.j.u.t.Invocable$InvocableExecutor - org.eclipse.jetty.util.thread.Invocable$InvocableExecutor@4dfc073a invoked org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@543935e4
02-06-2018 00:27:59.099 [qtp859617558-24] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@5689f60
02-06-2018 00:27:59.099 [qtp859617558-17] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@707b1a44/org.eclipse.jetty.io.ManagedSelector$SelectorProducer@7132a9dc/PRODUCING/1/1 produce exit
02-06-2018 00:27:59.099 [qtp859617558-26] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.099 [qtp859617558-17] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$$Lambda$26/86506638@2c7106d9
02-06-2018 00:27:59.100 [qtp859617558-26] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.100 [qtp859617558-26] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@5ce56a5a
02-06-2018 00:27:59.093 [qtp859617558-20] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.095 [qtp859617558-22] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.ExceptionInInitializerError: null
at org.eclipse.jetty.server.HttpConnection.<clinit>(HttpConnection.java:54)
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
at org.eclipse.jetty.http.PreEncodedHttpField.<clinit>(PreEncodedHttpField.java:71)
... 9 common frames omitted
02-06-2018 00:27:59.094 [qtp859617558-23] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.102 [qtp859617558-23] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.102 [qtp859617558-23] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@752bc090
02-06-2018 00:27:59.102 [qtp859617558-20] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.102 [qtp859617558-20] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@1985be4c
02-06-2018 00:27:59.103 [qtp859617558-22] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.ExceptionInInitializerError: null
at org.eclipse.jetty.server.HttpConnection.<clinit>(HttpConnection.java:54)
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
at org.eclipse.jetty.http.PreEncodedHttpField.<clinit>(PreEncodedHttpField.java:71)
... 9 common frames omitted
02-06-2018 00:27:59.103 [qtp859617558-22] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@3416caab
02-06-2018 00:27:59.103 [qtp859617558-18-acceptor-0@178f268a-ServerConnector@cfbc8e8{HTTP/1.1,[http/1.1, h2c]}{0.0.0.0:9000}] DEBUG org.eclipse.jetty.io.ManagedSelector - Queued change org.eclipse.jetty.io.ManagedSelector$Accept@6cf5cd13 on org.eclipse.jetty.io.ManagedSelector@440e3ce6 id=0 keys=1 selected=0
02-06-2018 00:27:59.108 [qtp859617558-16] DEBUG org.eclipse.jetty.io.ManagedSelector - Selector loop woken up from select, 0/0 selected
02-06-2018 00:27:59.108 [qtp859617558-16] DEBUG org.eclipse.jetty.io.ManagedSelector - Running action org.eclipse.jetty.io.ManagedSelector$Accept@6cf5cd13
02-06-2018 00:27:59.108 [qtp859617558-16] DEBUG org.eclipse.jetty.io.ManagedSelector - Queued change org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@44ae85a2 on org.eclipse.jetty.io.ManagedSelector@440e3ce6 id=0 keys=1 selected=0
02-06-2018 00:27:59.108 [qtp859617558-16] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@3e67f5f2/org.eclipse.jetty.io.ManagedSelector$SelectorProducer@fd53053/PRODUCING/1/1->IDLE/0/1 EPC! org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@44ae85a2
02-06-2018 00:27:59.109 [qtp859617558-19] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@3e67f5f2/org.eclipse.jetty.io.ManagedSelector$SelectorProducer@fd53053/PRODUCING/0/1 produce non-blocking
02-06-2018 00:27:59.109 [qtp859617558-19] DEBUG org.eclipse.jetty.io.ManagedSelector - Selector loop waiting on select
02-06-2018 00:27:59.109 [qtp859617558-16] DEBUG o.e.j.util.thread.QueuedThreadPool - queue EatWhatYouKill@3e67f5f2/org.eclipse.jetty.io.ManagedSelector$SelectorProducer@fd53053/PRODUCING/0/1
02-06-2018 00:27:59.109 [qtp859617558-16] DEBUG o.e.j.u.t.Invocable$InvocableExecutor - org.eclipse.jetty.util.thread.Invocable$InvocableExecutor@5ba4a467 invoke  org.eclipse.jetty.io.ManagedSelector$CreateEndPoint@44ae85a2
02-06-2018 00:27:59.109 [qtp859617558-16] DEBUG org.eclipse.jetty.io.IdleTimeout - SocketChannelEndPoint@56d0b70c{/0:0:0:0:0:0:0:1:50414<->/0:0:0:0:0:0:0:1:9000,OPEN,fill=-,flush=-,to=0/30000}{io=0/0,kio=0,kro=0}-><null> idle timeout check, elapsed: 0 ms, remaining: 30000 ms
02-06-2018 00:27:59.110 [qtp859617558-16] DEBUG o.eclipse.jetty.io.AbstractEndPoint - onOpen SocketChannelEndPoint@56d0b70c{/0:0:0:0:0:0:0:1:50414<->/0:0:0:0:0:0:0:1:9000,OPEN,fill=-,flush=-,to=0/30000}{io=0/0,kio=0,kro=0}-><null>
02-06-2018 00:27:59.110 [qtp859617558-16] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.113 [qtp859617558-26] DEBUG o.e.j.util.thread.QueuedThreadPool - run EatWhatYouKill@3e67f5f2/org.eclipse.jetty.io.Man053/PRODUCING/0/1
02-06-2018 00:27:59.113 [qtp859617558-26] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@3e67f5f2/org.eclipse.jetty.io.ManagedSRODUCING/0/1 run
02-06-2018 00:27:59.116 [qtp859617558-16] DEBUG org.eclipse.jetty.io.ManagedSelector -
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jetty.server.HttpConnection
at org.eclipse.jetty.server.HttpConnectionFactory.newConnection(HttpConnectionFactory.java:85)
at org.eclipse.jetty.server.ServerConnector$ServerConnectorManager.newConnection(ServerConnector.java:482)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:424)
at org.eclipse.jetty.io.ManagedSelector.access$1600(ManagedSelector.java:61)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:603)
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
at java.lang.Thread.run(Thread.java:748)
02-06-2018 00:27:59.119 [qtp859617558-16] DEBUG o.e.j.u.t.Invocable$InvocableExecutor - org.eclipse.jetty.util.thread.Invocable$Invocablepse.jetty.io.ManagedSelector$CreateEndPoint@44ae85a2
02-06-2018 00:27:59.119 [qtp859617558-16] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@3e67f5f2/org.eclipse.jetty.io.ManagedSRODUCING/1/1 produce exit
02-06-2018 00:27:59.119 [qtp859617558-16] DEBUG o.e.j.util.thread.QueuedThreadPool - ran org.eclipse.jetty.io.ManagedSelector$$Lambda$26/

我的毕业文件：

buildscript {
    ext.kotlin_version = '1.2.21'
    ext.ktorVersion = '0.9.1'

    repositories {
        mavenCentral()
        jcenter()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "com.github.jengelman.gradle.plugins:shadow:2.0.2"
    }
}

apply plugin: 'com.github.johnrengelman.shadow'
apply plugin: 'java'
apply plugin: 'kotlin'
apply plugin: 'application'

mainClassName = 'routing.MainKt'
shadowJar {
    baseName = 'baseName'
    classifier = null
    version = null
}

sourceCompatibility = 1.8
compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

kotlin {
    experimental {
        coroutines "enable"
    }
}

repositories {
    mavenCentral()
    jcenter()
    maven { url "https://dl.bintray.com/kotlin/kotlinx" }
    maven { url "https://dl.bintray.com/kotlin/ktor" }
    maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
}

dependencies {
    // Core Kotlin libs
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"

    // Core Ktor libs
    def withoutKotlin = {
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jdk8'
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jdk7'
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-reflect'
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jre8'
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jre7'
    }
    implementation "io.ktor:ktor-server-core:$ktorVersion", withoutKotlin
    implementation "io.ktor:ktor-server-netty:$ktorVersion", withoutKotlin
    implementation "io.ktor:ktor-freemarker:$ktorVersion", withoutKotlin
    implementation "io.ktor:ktor-locations:$ktorVersion", withoutKotlin

    .... More dependencies
}

score 12 · Accepted Answer

将以下内容添加到您的 Gradle 构建脚本中：

import com.github.jengelman.gradle.plugins.shadow.transformers.ServiceFileTransformer
shadowJar {
    transform(ServiceFileTransformer) {
        path = 'META-INF/services'
        include 'org.eclipse.jetty.http.HttpFieldPreEncoder'
    }
}

我最终发现 shadowJar 默认情况下没有将我的“META-INF”文件合并在一起。这是一个问题，因为当 Jetty 服务器启动时，它会引用“META-INF/services/org.eclipse.jetty.http.HttpFieldPreEncoder”来加载正确的 HttpField 编码器。由于我的服务文件没有正确合并，所以只加载了 Http2 编码器。这反过来又导致 JVM 在 Jetty 尝试静态初始化 PreEncodedHttpField 时抛出 java.lang.ExceptionInInitializerError 错误，进而导致 Jetty 的 HttpConnection 中出现 NoClassDefError

我从这里和这里找到了提示

java - 尝试通过嵌入式 Jetty 服务器运行 Ktor 应用程序时如何避免 java.lang.ExceptionInInitializerError？

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