Flink 1.11 读取kafka注册为表
先上代码：
import org.apache.flink.streaming.api.datastream.DataStream; import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import org.apache.flink.table.api.EnvironmentSettings; import org.apache.flink.table.api.Table; import org.apache.flink.table.api.TableResult; import org.apache.flink.table.api.bridge.java.StreamTableEnvironment; import org.apache.flink.types.Row; /** * @program: flink-tech * @description: 1.11情况下的sql * @author: Mr.Wang * @create: 2020-07-13 09:41 **/ public class TableDemo { /** * 官网API网址：https://ci.apache.org/projects/flink/flink-docs-release-1.11/zh/dev/table/connectors/kafka.html#how-to-create-a-kafka-table * *所有参数： * connector * topic * properties.bootstrap.servers * properties.group.id * format * scan.startup.mode * scan.startup.specific-offsets * scan.startup.timestamp-millis * sink.partitioner * */ private static final String KAFKA_SQL = "CREATE TABLE kafkaTable (\n" + " code STRING," + " total_emp INT" + ") WITH (" + " 'connector' = 'kafka'," + " 'topic' = 'flink_dwd_test1'," + " 'properties.bootstrap.servers' = 'local:9092'," + " 'properties.group.id' = 'test1'," + " 'format' = 'json'," + " 'scan.startup.mode' = 'earliest-offset'" + ")"; public static void main(String[] args) throws Exception { //bink table StreamExecutionEnvironment bsEnv = StreamExecutionEnvironment.getExecutionEnvironment(); EnvironmentSettings bsSettings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build(); StreamTableEnvironment bsTableEnv = StreamTableEnvironment.create(bsEnv, bsSettings); TableResult tableResult = bsTableEnv.executeSql(KAFKA_SQL); Table table = bsTableEnv.sqlQuery("select * from kafkaTable"); DataStreamdsRow = bsTableEnv.toAppendStream(table, Row.class); dsRow.print(); // tableResult.print(); // bsTableEnv.execute("aaa"); bsEnv.execute("aa"); } }
pom依赖：
这里我要多说一点，我开始的时候安装官网的依赖导入执行一直报错，在官网群问过很多次，后来还是通过白斩鸡确认之后，基础代码没问题，是依赖问题，自动上次误删代码之后，我的本地代码各种问题，即使我把各种依赖注释删除，只剩官网的依赖，运行代码还是报错：
Exception in thread "main" java.util.concurrent.ExecutionException: org.apache.flink.runtime.client.JobExecutionException: Job execution failed. at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895) at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1719) at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.execute(LocalStreamEnvironment.java:74) at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1699) at flinksql.TableDemo.main(TableDemo.java:45) Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed. at org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:147) at org.apache.flink.client.program.PerJobMiniClusterFactory$PerJobMiniClusterJobClient.lambda$getJobExecutionResult$2(PerJobMiniClusterFactory.java:186) at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602) at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) at org.apache.flink.runtime.rpc.akka.AkkaInvocationHandler.lambda$invokeRpc$0(AkkaInvocationHandler.java:229) at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760) at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474) at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1962) at org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:892) at akka.dispatch.OnComplete.internal(Future.scala:264) at akka.dispatch.OnComplete.internal(Future.scala:261) at akka.dispatch.japi$CallbackBridge.apply(Future.scala:191) at akka.dispatch.japi$CallbackBridge.apply(Future.scala:188) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36) at org.apache.flink.runtime.concurrent.Executors$DirectExecutionContext.execute(Executors.java:74) at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:44) at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:252) at akka.pattern.PromiseActorRef.$bang(AskSupport.scala:572) at akka.pattern.PipeToSupport$PipeableFuture$$anonfun$pipeTo$1.applyOrElse(PipeToSupport.scala:22) at akka.pattern.PipeToSupport$PipeableFuture$$anonfun$pipeTo$1.applyOrElse(PipeToSupport.scala:21) at scala.concurrent.Future$$anonfun$andThen$1.apply(Future.scala:436) at scala.concurrent.Future$$anonfun$andThen$1.apply(Future.scala:435) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36) at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55) at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:91) at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91) at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91) at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72) at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:90) at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:44) at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by NoRestartBackoffTimeStrategy at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:116) at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:78) at org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:192) at org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:185) at org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:179) at org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:503) at org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:386) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:284) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:199) at org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:74) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:152) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123) at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) at akka.actor.Actor$class.aroundReceive(Actor.scala:517) at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592) at akka.actor.ActorCell.invoke(ActorCell.scala:561) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258) at akka.dispatch.Mailbox.run(Mailbox.scala:225) at akka.dispatch.Mailbox.exec(Mailbox.scala:235) ... 4 more Caused by: java.lang.AbstractMethodError: org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.createFetcher(Lorg/apache/flink/streaming/api/functions/source/SourceFunction$SourceContext;Ljava/util/Map;Lorg/apache/flink/util/SerializedValue;Lorg/apache/flink/streaming/api/operators/StreamingRuntimeContext;Lorg/apache/flink/streaming/connectors/kafka/config/OffsetCommitMode;Lorg/apache/flink/metrics/MetricGroup;Z)Lorg/apache/flink/streaming/connectors/kafka/internals/AbstractFetcher; at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:736) at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100) at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63) at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
好了，上最基础的pom依赖：
org.apache.flink flink-json ${flink.version} org.apache.flink flink-core ${flink.version} org.apache.flink flink-table-api-java-bridge_${scala.binary.version} ${flink.version} org.apache.flink flink-table-api-scala-bridge_${scala.binary.version} ${flink.version} org.apache.flink flink-table-planner_${scala.binary.version} ${flink.version} org.apache.flink flink-table-planner-blink_${scala.binary.version} ${flink.version} org.apache.flink flink-table-common 1.11.0 provided org.apache.flink flink-streaming-scala_${scala.binary.version} ${flink.version} org.apache.flink flink-clients_${scala.binary.version} ${flink.version} org.apache.flink flink-connector-kafka_2.11 1.11.0 provided
最后思考：如果不是官网代码问题，而是自己本地环境依赖有问题怎么解决：
1，代码找别人执行，对比验证
2，新建项目，导入官网基础依赖
3，使用zeppelin在web端测试代码，这样子很靠谱。
4，清空libraries所有依赖
右键项目 maven reimport:
希望对大家有用。