Hello,
this is probably caused by a known issue in 1.4.1:
https://issues.apache.org/jira/browse/FLINK-8741
This bug is not present in 1.4.0, and it will fixed in 1.4.2 which
should be released within the next days.
As a temporary workaround you can copy your app-assembly-1.0.jar into
the /lib directory.
On 28.02.2018 08:45, Debasish Ghosh wrote:
Hi -
Facing a ClassNotFoundException while running Flink application that
reads from Kafka. This is a modified version of the NYC Taxi App that
reads from Kafka.
I am using Flink 1.4.1 .. The application runs ok with Flink 1.3 ..
Here's the exception ..
java.lang.ClassNotFoundException:
com.lightbend.fdp.sample.flink.app.TaxiRideTSAssigner
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at
org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:73)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1620)
at
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1521)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1781)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
at
org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:393)
at
org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:380)
at
org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:368)
at
org.apache.flink.util.SerializedValue.deserializeValue(SerializedValue.java:58)
at
org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.createPartitionStateHolders(AbstractFetcher.java:521)
at
org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.<init>(AbstractFetcher.java:167)
at
org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.<init>(Kafka09Fetcher.java:89)
at
org.apache.flink.streaming.connectors.kafka.internal.Kafka010Fetcher.<init>(Kafka010Fetcher.java:62)
at
org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer010.createFetcher(FlinkKafkaConsumer010.java:203)
at
org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:564)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:86)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:55)
at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:94)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:264)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
at java.lang.Thread.run(Thread.java:745)
I run the application as follows ..
$ ./bin/flink run
/Users/debasishghosh/flink/source/core/app/target/scala-2.11/app-assembly-1.0.jar
--broker-list localhost:9092 --inTopic taxiin --outTopic taxiout
I verified that the jar contains the class ..
$ jar tvf app-assembly-1.0.jar | grep TaxiRideTSAssigner
2090 Wed Feb 28 12:59:52 IST 2018
com/lightbend/fdp/sample/flink/app/TaxiRideTSAssigner.class
Here are the relevant dependencies in build ..
val flinkScala = "org.apache.flink" %%
"flink-scala" % "1.4.1" % "provided"
val flinkStreamingScala = "org.apache.flink" %%
"flink-streaming-scala" % "1.4.1" % "provided"
val flinkKafka = "org.apache.flink" %%
"flink-connector-kafka-0.11" % "1.4.1" exclude("org.slf4j",
"slf4j-log4j12")
any help ?
regards.
--
Debasish Ghosh
http://manning.com/ghosh2
http://manning.com/ghosh
Twttr: @debasishg
Blog: http://debasishg.blogspot.com
Code: http://github.com/debasishg
