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  1. Flink
  2. FLINK-4236

Flink Dashboard stops showing list of uploaded jars if main method cannot be looked up

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.0.3
    • Fix Version/s: 1.2.0, 1.1.2
    • Component/s: Job-Submission
    • Labels:
      None

      Description

      The Flink Dashboard stops showing the list of uploaded jars on the job submission page if a jar is uploaded for which the main method cannot be looked up. The HTTP call returns with code 500. See the attached stacktrace:

      java.lang.RuntimeException: Failed to fetch jar list: Could not look up the main(String[]) method from the class de.zalando.[...]]: org/shaded/apache/flink/streaming/api/functions/source/SourceFunction
      at org.apache.flink.runtime.webmonitor.handlers.JarListHandler.handleRequest(JarListHandler.java:122)
      at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.respondAsLeader(RuntimeMonitorHandler.java:135)
      at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.channelRead0(RuntimeMonitorHandler.java:112)
      at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.channelRead0(RuntimeMonitorHandler.java:60)
      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:104)
      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:745)
      Caused by: java.lang.RuntimeException: Could not look up the main(String[]) method from the class de.zalando.[...]]: org/shaded/apache/flink/streaming/api/functions/source/SourceFunction
      at org.apache.flink.client.program.PackagedProgram.hasMainMethod(PackagedProgram.java:479)
      at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:216)
      at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:147)
      at org.apache.flink.runtime.webmonitor.handlers.JarListHandler.handleRequest(JarListHandler.java:103)
      ... 30 more
      Caused by: java.lang.NoClassDefFoundError: org/shaded/apache/flink/streaming/api/functions/source/SourceFunction
      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:473)
      ... 33 more
      Caused by: java.lang.ClassNotFoundException: org.shaded.apache.flink.streaming.api.functions.source.SourceFunction
      at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
      ... 39 more
      

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              • Assignee:
                mxm Maximilian Michels
                Reporter:
                gjy Gary Yao
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                Dates

                • Created:
                  Updated:
                  Resolved: