Apache Ignite中的Flink Streamer

Question

我正在使用ApacheFlink-1.1.3进行实时流数据分析。我的系统由用于消息队列的Kafka集群、从Kafka分区读取消息并对其进行分析的Flink集群组成，最后我希望将生成的数据转储到Ignite缓存中。对于系统，我使用IgniteSink类将数据放入ignite缓存。版本如下:

Flink1.1.3，
Kafka2.10，点燃2.0.0

当我试图在flink cluster上运行作业时，它给出了以下错误：，

Exception in thread "main" org.apache.flink.client.program.ProgramInvocationException: The program execution failed: Job execution failed.
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:409)
at org.apache.flink.client.program.StandaloneClusterClient.submitJob(StandaloneClusterClient.java:95)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:382)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:374)
at org.apache.flink.streaming.api.environment.RemoteStreamEnvironment.executeRemotely(RemoteStreamEnvironment.java:209)
at org.apache.flink.streaming.api.environment.RemoteStreamEnvironment.execute(RemoteStreamEnvironment.java:173)
at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1429)
at flink_ignite_sink_remote.main(flink_ignite_sink_remote.java:77)
Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply$mcV$sp(JobManager.scala:822)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply(JobManager.scala:768)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply(JobManager.scala:768)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.apache.ignite.sink.flink.IgniteSink$SinkContext$Holder
at org.apache.ignite.sink.flink.IgniteSink$SinkContext.getStreamer(IgniteSink.java:201)
at org.apache.ignite.sink.flink.IgniteSink$SinkContext.access$100(IgniteSink.java:175)
at org.apache.ignite.sink.flink.IgniteSink.invoke(IgniteSink.java:165)
at org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:39)
at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:373)
at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:358)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:346)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:329)
at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
at flink_ignite_sink_remote$Splitter.flatMap(flink_ignite_sink_remote.java:177)
at flink_ignite_sink_remote$Splitter.flatMap(flink_ignite_sink_remote.java:1)
at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:48)
at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:373)
at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:358)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:346)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:329)
at org.apache.flink.streaming.api.operators.StreamSource$NonTimestampContext.collect(StreamSource.java:161)
at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.emitRecord(AbstractFetcher.java:225)
at org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.run(Kafka09Fetcher.java:253)
at java.lang.Thread.run(Thread.java:745)

我已经将Ignite Flink的所有库都包含在我的项目中，但我仍然得到了java。lang.NoClassDefFoundError错误。

Answer 1

使用部署在flink群集上的flink作业时，有两个选项：

1. 生成一个包含所有依赖项的jar文件，并部署该jar
2. 将所有依赖项添加到flink服务器的类路径中，这样它就可以从jar文件中找到这些依赖项

您的问题似乎不是生成一个包含所有依赖项的jar文件，而且这些依赖项不在fink服务器的类路径中。

尝试运行以下mvn命令以生成JAR：

mvn清洁包-Pbuild jar

它可以生成多个罐子，选择胖罐子（越大）

Answer 2

Apache Ignite用户论坛也讨论了这一点：http://apache-ignite-users.70518.x6.nabble.com/Flink-Streamer-td10650.html

Answer 3

我怀疑你用的是一个简单的罐子，而不是超级/胖罐子。

如果您正在使用maven，请尝试shade插件或用于sbt sbt组装。您还可以按照《快速入门指南》中的说明创建项目