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From "Ufuk Celebi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-2381) Possible class not found Exception on failed partition producer
Date Mon, 20 Jul 2015 13:02:06 GMT
Ufuk Celebi created FLINK-2381:
----------------------------------

             Summary: Possible class not found Exception on failed partition producer
                 Key: FLINK-2381
                 URL: https://issues.apache.org/jira/browse/FLINK-2381
             Project: Flink
          Issue Type: Improvement
          Components: Distributed Runtime
    Affects Versions: 0.9, master
            Reporter: Ufuk Celebi
             Fix For: 0.10, 0.9.1


Failing the production of a result partition marks the respective partition as failed with
a ProducerFailedException.

The cause of this exception can be a user defined class, which can only be loaded by the user
code class loader. The network stack fails the shuffle with a RemoteTransportException, which
has the user exception as a cause. When the consuming task receives this exception, this leads
to a class not found exception, because the network stack tries to load the class with the
system class loader.

{code}
+----------+
| FAILING  |
| PRODUCER |
+----------+
     || 
     \/
 ProducerFailedException(CAUSE) via network
     || 
     \/
+----------+
| RECEIVER |
+----------+
{code}

CAUSE is only loadable by the user code class loader.

When trying to deserialize this, RECEIVER fails with a LocalTransportException, which is super
confusing, because the error is not local, but remote.

Thanks to [~rmetzger] for reporting and debugging the issue with the following stack trace:

{code}
Flat Map (26/120)


14:03:00,343 ERROR org.apache.flink.streaming.runtime.tasks.OneInputStreamTask   - Flat Map
(26/120) failed
java.lang.RuntimeException: Could not read next record.
        at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.readNext(OneInputStreamTask.java:71)
        at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.invoke(OneInputStreamTask.java:101)
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:567)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.flink.runtime.io.network.netty.exception.LocalTransportException: java.lang.ClassNotFoundException:
kafka.common.ConsumerRebalanceFailedException
        at org.apache.flink.runtime.io.network.netty.PartitionRequestClientHandler.exceptionCaught(PartitionRequestClientHandler.java:151)
        at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:275)
        at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:253)
        at io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:131)
        at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:275)
        at io.netty.channel.AbstractChannelHandlerContext.notifyHandlerException(AbstractChannelHandlerContext.java:809)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:341)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
        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)
        ... 1 more
Caused by: io.netty.handler.codec.DecoderException: java.lang.ClassNotFoundException: kafka.common.ConsumerRebalanceFailedException
        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:99)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
        ... 12 more
Caused by: java.lang.ClassNotFoundException: kafka.common.ConsumerRebalanceFailedException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:278)
        at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:625)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1612)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1997)
        at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500)
        at java.lang.Throwable.readObject(Throwable.java:914)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1897)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
        at org.apache.flink.runtime.io.network.netty.NettyMessage$ErrorResponse.readFrom(NettyMessage.java:338)
        at org.apache.flink.runtime.io.network.netty.NettyMessage$ .decode(NettyMessage.java:161)
        at org.apache.flink.runtime.io.network.netty.NettyMessage$NettyMessageDecoder.decode(NettyMessage.java:123)
        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)
        ... 13 more
{code}



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