[FLINK-21889] source:canal-cdc , sink:upsert-kafka, print "select * from sinkTable", throw NullException

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Not A Problem
• Affects Version/s: 1.12.1
• Fix Version/s: 1.12.3
• Component/s: Connectors / Kafka

Environment

flink 1.12.1

• Assignee: Unassigned
• Reporter: Carl
• Created: 20/Mar/21 13:56
• Updated: 13/Apr/21 09:18
• Resolved: 13/Apr/21 09:18

Description

sourceTable:canal-cdc , sinkTable:upsert-kafka, print the result of  executesql("select * from sinkTable"), or print the result of RetractStream for sinkTable program will throw a NullException

if print the result of  executesql("select * from sourceTable")  or use some other operator to trigger the program，it will not throw the NullException。

program:

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.EnvironmentSettings;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;
import org.apache.flink.types.Row;

public class JIRA {

public static void main(String[] args) throws Exception {
 StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
 EnvironmentSettings envSettings = EnvironmentSettings.newInstance().inStreamingMode().useBlinkPlanner().build();
 StreamTableEnvironment tEnv = StreamTableEnvironment.create(env, envSettings);

tEnv.executeSql(" CREATE TABLE source_appl (\n" +
 " appl_seq STRING,\n" +
 " op_ts TIMESTAMP(3),\n" +
 " state STRING,\n" +
 " prod_no STRING,\n" +
 " area_no STRING,\n" +
 " amount BIGINT,\n" +
 " pt TIMESTAMP(3)\n" +
 " ) WITH (\n" +
 " 'connector' = 'kafka',\n" +
 " 'topic' = 'flink-OggJsonDemo-sinkKafkaDDL',\n" +
 " 'properties.bootstrap.servers' = '10.164.xxx.xxx:9092,10.164.xxx.xxx:9092,10.164.xxx.xxx:9092',\n" +
 " 'properties.group.id' = 'test-02',\n" +
 " 'scan.startup.mode' = 'latest-offset',\n" +
 " 'value.format' = 'canal-json'\n" +
 " )");

tEnv.executeSql(" CREATE TABLE sink_appl (\n" +
 " state STRING,\n" +
 " sumv BIGINT,\n" +
 " PRIMARY KEY(state) NOT ENFORCED\n" +
 " ) WITH (\n" +
 " 'connector' = 'upsert-kafka',\n" +
 " 'topic' = 'flink-OggJsonDemo-sinkKafkaDDL-Agg',\n" +
 " 'properties.bootstrap.servers' = '10.164.xxx.xxx:9092,10.164.xxx.xxx:9092,10.164.xxx.xxx:9092',\n" +
 " 'key.format' = 'json',\n" +
 " 'value.format' = 'json'\n" +
 " )");

tEnv.executeSql("insert into sink_appl select state,sum(amount) as sumv from source_appl group by state");

// tEnv.toRetractStream(tEnv.sqlQuery("select * from sink_appl"), Row.class).print();
 tEnv.executeSql("select * from sink_appl").print();

env.execute();
 }
}

Exception:

 

+----+--------------------------------+----------------------+| op |                          state |                 sumv |+----+--------------------------------+----------------------+Exception in thread "main" java.lang.RuntimeException: Failed to fetch next result at org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:109) at org.apache.flink.streaming.api.operators.collect.CollectResultIterator.hasNext(CollectResultIterator.java:80) at org.apache.flink.table.planner.sinks.SelectTableSinkBase$RowIteratorWrapper.hasNext(SelectTableSinkBase.java:117) at org.apache.flink.table.api.internal.TableResultImpl$CloseableRowIteratorWrapper.hasNext(TableResultImpl.java:350) at org.apache.flink.table.utils.PrintUtils.printAsTableauForm(PrintUtils.java:149) at org.apache.flink.table.api.internal.TableResultImpl.print(TableResultImpl.java:154) at org.carl.demo.flink.connector.kafka.ogg.GroupAggregateOggJsonDemo.main(GroupAggregateOggJsonDemo.java:30)Caused by: java.io.IOException: Failed to fetch job execution result at org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:169) at org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.next(CollectResultFetcher.java:118) at org.apache.flink.streaming.api.operators.collect.CollectResultIterator.nextResultFromFetcher(CollectResultIterator.java:106) ... 6 moreCaused by: 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:1928) at org.apache.flink.streaming.api.operators.collect.CollectResultFetcher.getAccumulatorResults(CollectResultFetcher.java:167) ... 8 moreCaused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed. at org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:144) at org.apache.flink.runtime.minicluster.MiniClusterJobClient.lambda$getJobExecutionResult$2(MiniClusterJobClient.java:117) at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616) at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:591) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488) at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1975) at org.apache.flink.runtime.rpc.akka.AkkaInvocationHandler.lambda$invokeRpc$0(AkkaInvocationHandler.java:238) at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774) at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750) at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488) at java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1975) at org.apache.flink.runtime.concurrent.FutureUtils$1.onComplete(FutureUtils.java:1046) at akka.dispatch.OnComplete.internal(Future.scala:264) at akka.dispatch.OnComplete.internal(Future.scala:261) at akka.dispatch.japi$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:73) 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$WorkQueue.runTask(ForkJoinPool.java:1339) at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by NoRestartBackoffTimeStrategy at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:118) at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:80) at org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:233) at org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:224) at org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:215) at org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:665) at org.apache.flink.runtime.scheduler.SchedulerNG.updateTaskExecutionState(SchedulerNG.java:89) at org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:447) at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:306) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:213) at org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:77) at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:159) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) at scala.PartialFunction$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 moreCaused by: *java.lang.NullPointerException at java.lang.String.<init>(String.java:566) at org.apache.flink.formats.json.JsonRowDataDeserializationSchema.deserialize(JsonRowDataDeserializationSchema.java:104) at org.apache.flink.formats.json.JsonRowDataDeserializationSchema.deserialize(JsonRowDataDeserializationSchema.java:46) at org.apache.flink.api.common.serialization.DeserializationSchema.deserialize(DeserializationSchema.java:82) at org.apache.flink.streaming.connectors.kafka.table.DynamicKafkaDeserializationSchema.deserialize(DynamicKafkaDeserializationSchema.java:119) at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.partitionConsumerRecordsHandler(KafkaFetcher.java:179) at org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher.runFetchLoop(KafkaFetcher.java:142) at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:826) at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110) at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66) at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:241)*
Process finished with exit code -1

Issue Links

• relates to: FLINK-20321 Get NPE when using AvroDeserializationSchema to deserialize null input