Код: Выделить всё
from title_flink_stream import TITLE_FLINK_STREAM
from pyflink.common import WatermarkStrategy, Types, SimpleStringSchema, Row
from pyflink.common.typeinfo import RowTypeInfo
from pyflink.datastream import StreamExecutionEnvironment
from pyflink.datastream.connectors.jdbc import JdbcConnectionOptions, JdbcExecutionOptions, JdbcSink
from pyflink.datastream.connectors.kafka import KafkaSource, KafkaOffsetsInitializer
from pyflink.datastream.functions import MapFunction
from pyflink.datastream.functions import MapFunction
import configparser
import os
config = configparser.ConfigParser()
path = os.path.dirname(__file__)
os.chdir(path)
config.read('resources/SystemConfig.ini')
env = StreamExecutionEnvironment.get_execution_environment()
env.set_parallelism(1)
env.add_jars('file:///home/joseph/flink/jars/flink-connector-kafka-3.1.0-1.18.jar',
'file:///home/joseph/flink/jars/kafka-clients-3.8.0.jar',
'file:///home/joseph/flink/jars/flink-connector-jdbc-3.1.2-1.18.jar',
'file:///home/joseph/flink/jars/mysql-connector-j-8.3.0.jar')
class CustomCsvMapFunction(MapFunction):
def map(self, value):
str_list = value.split(',')
# return Types.ROW(str_list)
if str_list[0] != '' and str_list[1] != '':
return Row(date=str_list[0], value=float(str_list[1]), state=str_list[2], id=str_list[3], title=str_list[4], frequency_short=str_list[5],\
units_short=str_list[6], seasonal_adjustment_short=str_list[7])
kafka_brokerlist = config['KAFKA_CONFIG']['kafka.brokerlist']
mysql_user = config['MYSQL_CONFIG']['mysql.user']
mysql_password = config['MYSQL_CONFIG']['mysql.password']
mysql_host_url = config['MYSQL_CONFIG']['mysql.host.url']
type_name = ['date','value','state','id','title','frequency_short','units_short','seasonal_adjustment_short']
type_schema = [Types.STRING(), Types.FLOAT(), Types.STRING(), Types.STRING(), Types.STRING(), Types.STRING(), Types.STRING(), Types.STRING()]
output_type = Types.ROW_NAMED(type_name, type_schema)
type_info = RowTypeInfo(type_schema, type_name)
source = KafkaSource.builder() \
.set_bootstrap_servers(kafka_brokerlist) \
.set_topics('topic_' + 'exportGoods') \
.set_starting_offsets(KafkaOffsetsInitializer.earliest()) \
.set_value_only_deserializer(SimpleStringSchema()) \
.build()
ds = env.from_source(source, WatermarkStrategy.no_watermarks(), "Kafka Source")
csv_ds = ds.filter(lambda str: not(str.startswith('date'))).map(CustomCsvMapFunction(), output_type=output_type)
# csv_ds.print()
jdbcConnOptions = JdbcConnectionOptions.JdbcConnectionOptionsBuilder()\
.with_url(mysql_host_url)\
.with_driver_name('com.mysql.cj.jdbc.Driver')\
.with_user_name(mysql_user)\
.with_password(mysql_password)\
.build()
jdbcExeOptions = JdbcExecutionOptions.builder()\
.with_batch_interval_ms(1000)\
.with_batch_size(200)\
.with_max_retries(5)\
.build()
csv_ds.add_sink(
JdbcSink.sink(
'INSERT INTO ' + 'tbl_' + 'exportGoods' + ' VALUES(?, ?, ?, ?, ?, ?, ?, ?)',
type_info, jdbcConnOptions, jdbcExeOptions))
env.execute('Flink Save2 MySQL')
env.close()
Код: Выделить всё
for flink_stream in TITLE_FLINK_STREAM:
source = KafkaSource.builder() \
.set_bootstrap_servers(kafka_brokerlist) \
.set_topics('topic_' + flink_stream.suffix) \
.set_starting_offsets(KafkaOffsetsInitializer.earliest()) \
.set_value_only_deserializer(SimpleStringSchema()) \
.build()
ds = env.from_source(source, WatermarkStrategy.no_watermarks(), "Kafka Source")
csv_ds = ds.filter(lambda str: not(str.startswith('date'))).map(CustomCsvMapFunction(), output_type=output_type)
# csv_ds.print()
jdbcConnOptions = JdbcConnectionOptions.JdbcConnectionOptionsBuilder()\
.with_url(mysql_host_url)\
.with_driver_name('com.mysql.cj.jdbc.Driver')\
.with_user_name(mysql_user)\
.with_password(mysql_password)\
.build()
jdbcExeOptions = JdbcExecutionOptions.builder()\
.with_batch_interval_ms(1000)\
.with_batch_size(200)\
.with_max_retries(5)\
.build()
csv_ds.add_sink(
JdbcSink.sink(
'INSERT INTO ' + 'tbl_' + flink_stream.suffix + ' VALUES(?, ?, ?, ?, ?, ?, ?, ?)',
type_info, jdbcConnOptions, jdbcExeOptions))
env.execute('Flink Save2 MySQL')
env.close()
Код: Выделить всё
Exception in thread read_grpc_client_inputs:
Traceback (most recent call last):
File "/usr/lib/python/anaconda3/lib/python3.11/threading.py", line 1045, in _bootstrap_inner
self.run()
File "/usr/lib/python/anaconda3/lib/python3.11/threading.py", line 982, in run
self._target(*self._args, **self._kwargs)
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/apache_beam/runners/worker/data_plane.py", line 669, in
target=lambda: self._read_inputs(elements_iterator),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/apache_beam/runners/worker/data_plane.py", line 652, in _read_inputs
for elements in elements_iterator:
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/grpc/_channel.py", line 543, in __next__
return self._next()
^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/grpc/_channel.py", line 969, in _next
raise self
grpc._channel._MultiThreadedRendezvous:
Exception in thread read_grpc_client_inputs:
Traceback (most recent call last):
File "/usr/lib/python/anaconda3/lib/python3.11/threading.py", line 1045, in _bootstrap_inner
self.run()
File "/usr/lib/python/anaconda3/lib/python3.11/threading.py", line 982, in run
self._target(*self._args, **self._kwargs)
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/apache_beam/runners/worker/data_plane.py", line 669, in
target=lambda: self._read_inputs(elements_iterator),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/apache_beam/runners/worker/data_plane.py", line 652, in _read_inputs
for elements in elements_iterator:
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/grpc/_channel.py", line 543, in __next__
return self._next()
^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/grpc/_channel.py", line 969, in _next
raise self
grpc._channel._MultiThreadedRendezvous:
Exception in thread read_grpc_client_inputs:
Traceback (most recent call last):
File "/usr/lib/python/anaconda3/lib/python3.11/threading.py", line 1045, in _bootstrap_inner
self.run()
File "/usr/lib/python/anaconda3/lib/python3.11/threading.py", line 982, in run
self._target(*self._args, **self._kwargs)
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/apache_beam/runners/worker/data_plane.py", line 669, in
target=lambda: self._read_inputs(elements_iterator),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/apache_beam/runners/worker/data_plane.py", line 652, in _read_inputs
for elements in elements_iterator:
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/grpc/_channel.py", line 543, in __next__
return self._next()
^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/grpc/_channel.py", line 969, in _next
raise self
grpc._channel._MultiThreadedRendezvous:
Traceback (most recent call last):
File "/home/joseph/VSCode_Workspace/etl-stream-python/com/aaa/etl/jdbctest.py", line 116, in
env.execute('Flink Save2 MySQL')
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/pyflink/datastream/stream_execution_environment.py", line 824, in execute
return JobExecutionResult(self._j_stream_execution_environment.execute(j_stream_graph))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/py4j/java_gateway.py", line 1322, in __call__
return_value = get_return_value(
^^^^^^^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/pyflink/util/exceptions.py", line 146, in deco
return f(*a, **kw)
^^^^^^^^^^^
File "/home/joseph/VSCode_Workspace/.venv-etl/lib/python3.11/site-packages/py4j/protocol.py", line 326, in get_return_value
raise Py4JJavaError(
py4j.protocol.Py4JJavaError: An error occurred while calling o10.execute.
: 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$3(MiniClusterJobClient.java:141)
at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
at org.apache.flink.runtime.rpc.pekko.PekkoInvocationHandler.lambda$invokeRpc$1(PekkoInvocationHandler.java:268)
at java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:863)
at java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:841)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
at org.apache.flink.util.concurrent.FutureUtils.doForward(FutureUtils.java:1287)
at org.apache.flink.runtime.concurrent.ClassLoadingUtils.lambda$null$1(ClassLoadingUtils.java:93)
at org.apache.flink.runtime.concurrent.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:68)
at org.apache.flink.runtime.concurrent.ClassLoadingUtils.lambda$guardCompletionWithContextClassLoader$2(ClassLoadingUtils.java:92)
at java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:863)
at java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:841)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
at org.apache.flink.runtime.concurrent.pekko.ScalaFutureUtils$1.onComplete(ScalaFutureUtils.java:47)
at org.apache.pekko.dispatch.OnComplete.internal(Future.scala:310)
at org.apache.pekko.dispatch.OnComplete.internal(Future.scala:307)
at org.apache.pekko.dispatch.japi$CallbackBridge.apply(Future.scala:234)
at org.apache.pekko.dispatch.japi$CallbackBridge.apply(Future.scala:231)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
at org.apache.flink.runtime.concurrent.pekko.ScalaFutureUtils$DirectExecutionContext.execute(ScalaFutureUtils.java:65)
at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:72)
at scala.concurrent.impl.Promise$DefaultPromise.$anonfun$tryComplete$1(Promise.scala:288)
at scala.concurrent.impl.Promise$DefaultPromise.$anonfun$tryComplete$1$adapted(Promise.scala:288)
at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:288)
at org.apache.pekko.pattern.PromiseActorRef.$bang(AskSupport.scala:629)
at org.apache.pekko.pattern.PipeToSupport$PipeableFuture$$anonfun$pipeTo$1.applyOrElse(PipeToSupport.scala:34)
at org.apache.pekko.pattern.PipeToSupport$PipeableFuture$$anonfun$pipeTo$1.applyOrElse(PipeToSupport.scala:33)
at scala.concurrent.Future.$anonfun$andThen$1(Future.scala:536)
at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:33)
at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:33)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
at org.apache.pekko.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:73)
at org.apache.pekko.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:110)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
at org.apache.pekko.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:110)
at org.apache.pekko.dispatch.TaskInvocation.run(AbstractDispatcher.scala:59)
at org.apache.pekko.dispatch.ForkJoinExecutorConfigurator$PekkoForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:57)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)
Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by NoRestartBackoffTimeStrategy
at org.apache.flink.runtime.executiongraph.failover.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:219)
at org.apache.flink.runtime.executiongraph.failover.ExecutionFailureHandler.handleFailureAndReport(ExecutionFailureHandler.java:166)
at org.apache.flink.runtime.executiongraph.failover.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:121)
at org.apache.flink.runtime.scheduler.DefaultScheduler.recordTaskFailure(DefaultScheduler.java:281)
at org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:272)
at org.apache.flink.runtime.scheduler.DefaultScheduler.onTaskFailed(DefaultScheduler.java:265)
at org.apache.flink.runtime.scheduler.SchedulerBase.onTaskExecutionStateUpdate(SchedulerBase.java:787)
at org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:764)
at org.apache.flink.runtime.scheduler.SchedulerNG.updateTaskExecutionState(SchedulerNG.java:83)
at org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:515)
at jdk.internal.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at org.apache.flink.runtime.rpc.pekko.PekkoRpcActor.lambda$handleRpcInvocation$1(PekkoRpcActor.java:318)
at org.apache.flink.runtime.concurrent.ClassLoadingUtils.runWithContextClassLoader(ClassLoadingUtils.java:83)
at org.apache.flink.runtime.rpc.pekko.PekkoRpcActor.handleRpcInvocation(PekkoRpcActor.java:316)
at org.apache.flink.runtime.rpc.pekko.PekkoRpcActor.handleRpcMessage(PekkoRpcActor.java:229)
at org.apache.flink.runtime.rpc.pekko.FencedPekkoRpcActor.handleRpcMessage(FencedPekkoRpcActor.java:88)
at org.apache.flink.runtime.rpc.pekko.PekkoRpcActor.handleMessage(PekkoRpcActor.java:174)
at org.apache.pekko.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:33)
at org.apache.pekko.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:29)
at scala.PartialFunction.applyOrElse(PartialFunction.scala:127)
at scala.PartialFunction.applyOrElse$(PartialFunction.scala:126)
at org.apache.pekko.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:29)
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:175)
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:176)
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:176)
at org.apache.pekko.actor.Actor.aroundReceive(Actor.scala:547)
at org.apache.pekko.actor.Actor.aroundReceive$(Actor.scala:545)
at org.apache.pekko.actor.AbstractActor.aroundReceive(AbstractActor.scala:229)
at org.apache.pekko.actor.ActorCell.receiveMessage(ActorCell.scala:590)
at org.apache.pekko.actor.ActorCell.invoke(ActorCell.scala:557)
at org.apache.pekko.dispatch.Mailbox.processMailbox(Mailbox.scala:280)
at org.apache.pekko.dispatch.Mailbox.run(Mailbox.scala:241)
at org.apache.pekko.dispatch.Mailbox.exec(Mailbox.scala:253)
... 5 more
Caused by: java.io.IOException: Failed to deserialize consumer record due to
at org.apache.flink.connector.kafka.source.reader.KafkaRecordEmitter.emitRecord(KafkaRecordEmitter.java:56)
at org.apache.flink.connector.kafka.source.reader.KafkaRecordEmitter.emitRecord(KafkaRecordEmitter.java:33)
at org.apache.flink.connector.base.source.reader.SourceReaderBase.pollNext(SourceReaderBase.java:203)
at org.apache.flink.streaming.api.operators.SourceOperator.emitNext(SourceOperator.java:422)
at org.apache.flink.streaming.runtime.io.StreamTaskSourceInput.emitNext(StreamTaskSourceInput.java:68)
at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:638)
at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:231)
at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:973)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:917)
at org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:970)
at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:949)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:763)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:575)
at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: Could not forward element to next operator
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:92)
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:50)
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:29)
at org.apache.flink.streaming.runtime.tasks.SourceOperatorStreamTask$AsyncDataOutputToOutput.emitRecord(SourceOperatorStreamTask.java:310)
at org.apache.flink.streaming.api.operators.source.SourceOutputWithWatermarks.collect(SourceOutputWithWatermarks.java:110)
at org.apache.flink.connector.kafka.source.reader.KafkaRecordEmitter$SourceOutputWrapper.collect(KafkaRecordEmitter.java:67)
at org.apache.flink.api.common.serialization.DeserializationSchema.deserialize(DeserializationSchema.java:84)
at org.apache.flink.connector.kafka.source.reader.deserializer.KafkaValueOnlyDeserializationSchemaWrapper.deserialize(KafkaValueOnlyDeserializationSchemaWrapper.java:51)
at org.apache.flink.connector.kafka.source.reader.KafkaRecordEmitter.emitRecord(KafkaRecordEmitter.java:53)
... 14 more
Caused by: org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: Could not forward element to next operator
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:92)
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:50)
at org.apache.flink.streaming.runtime.tasks.ChainingOutput.collectAndCheckIfChained(ChainingOutput.java:90)
at org.apache.flink.streaming.runtime.tasks.ChainingOutput.collectAndCheckIfChained(ChainingOutput.java:40)
at org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:83)
at org.apache.flink.streaming.runtime.tasks.BroadcastingOutputCollector.collect(BroadcastingOutputCollector.java:34)
at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:52)
at org.apache.flink.streaming.api.operators.python.process.collector.RunnerOutputCollector.collect(RunnerOutputCollector.java:52)
at org.apache.flink.streaming.api.operators.python.process.AbstractExternalOneInputPythonFunctionOperator.emitResult(AbstractExternalOneInputPythonFunctionOperator.java:133)
at org.apache.flink.streaming.api.operators.python.process.AbstractExternalPythonFunctionOperator.emitResults(AbstractExternalPythonFunctionOperator.java:142)
at org.apache.flink.streaming.api.operators.python.process.AbstractExternalPythonFunctionOperator.invokeFinishBundle(AbstractExternalPythonFunctionOperator.java:101)
at org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator.checkInvokeFinishBundleByCount(AbstractPythonFunctionOperator.java:292)
at org.apache.flink.streaming.api.operators.python.process.AbstractExternalOneInputPythonFunctionOperator.processElement(AbstractExternalOneInputPythonFunctionOperator.java:146)
at org.apache.flink.streaming.api.operators.python.process.ExternalPythonProcessOperator.processElement(ExternalPythonProcessOperator.java:112)
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:75)
... 22 more
Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.flink.types.Row.getFieldNames(boolean)" because "from" is null
at org.apache.flink.api.java.typeutils.runtime.RowSerializer.copy(RowSerializer.java:137)
at org.apache.flink.api.java.typeutils.runtime.RowSerializer.copy(RowSerializer.java:69)
at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:74)
Подробнее здесь: https://stackoverflow.com/questions/790 ... link-types
