Question

我的Flink程序在IntellijIdea中成功运行，但当我将该程序的jar文件提交为jar时，它会显示以下错误

ava.lang.RuntimeException: Could not look up the main(String[]) method from the class org.carleton.cep.monitoring.latest.MobileCEP: org/apache/flink/cep/pattern/conditions/IterativeCondition
    at org.apache.flink.client.program.PackagedProgram.hasMainMethod(PackagedProgram.java:480)
    at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:217)
    at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:148)
    at org.apache.flink.runtime.webmonitor.handlers.JarActionHandler.getJobGraphAndClassLoader(JarActionHandler.java:91)
    at org.apache.flink.runtime.webmonitor.handlers.JarPlanHandler.handleRequest(JarPlanHandler.java:42)
    at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.respondAsLeader(RuntimeMonitorHandler.java:88)
    at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandlerBase.channelRead0(RuntimeMonitorHandlerBase.java:84)
    at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandlerBase.channelRead0(RuntimeMonitorHandlerBase.java:44)
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
    at io.netty.handler.codec.http.router.Handler.routed(Handler.java:62)
    at io.netty.handler.codec.http.router.DualAbstractHandler.channelRead0(DualAbstractHandler.java:57)
    at io.netty.handler.codec.http.router.DualAbstractHandler.channelRead0(DualAbstractHandler.java:20)
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
    at org.apache.flink.runtime.webmonitor.HttpRequestHandler.channelRead0(HttpRequestHandler.java:105)
    at org.apache.flink.runtime.webmonitor.HttpRequestHandler.channelRead0(HttpRequestHandler.java:65)
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
    at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:147)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
    at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
    at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/flink/cep/pattern/conditions/IterativeCondition
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at org.apache.flink.client.program.PackagedProgram.hasMainMethod(PackagedProgram.java:474)
    ... 34 more
Caused by: java.lang.ClassNotFoundException: org.apache.flink.cep.pattern.conditions.IterativeCondition
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 40 more

我已经在清单文件中处理了classpath，之前我也可以使用jar运行。

我的模式代码似乎存在一些问题，如下所示

 // detecting pattern

    Pattern<JoinedEvent, ?> pattern = Pattern.<JoinedEvent>begin("start")
            .subtype(JoinedEvent.class).
                    where(new SimpleCondition<JoinedEvent>() {
                        @Override
                        public boolean filter(JoinedEvent streamEvent) throws Exception {

                            return streamEvent.getRRInterval()>= 10 ;
                        }
                    })

            .subtype(JoinedEvent.class).where(new SimpleCondition<JoinedEvent>() {
                @Override
                public boolean filter(JoinedEvent streamEvent) throws Exception {
                    return streamEvent.getQrsInterval() >= 10 ;
                }
            } )
            .within(Time.milliseconds(WindowLength));

Answer 1

检查依赖项的范围是否设置为compile并且未提供。您可以在pom.xml中设置它，也可以转到“文件＆gt;项目结构＆gt;模块”，然后在右侧看到依赖项选项卡。在该选项卡中，您将看到项目的依赖项。找到flink.cep的依赖项（不确定它是否在核心flink库或其他依赖项中）并将范围设置为compile（如果尚未编译）。然后，正如@MikCode在他的评论中指出的那样，运行mvn clean install以确保一切都已设置并再试一次。

提交jar文件时无法运行Flink作业，但是在Intellij中运行程序

1 个答案: