Flink envía una tarea para acceder a HDFS e informa de un error. El UnsupportedFileSystemSchemeExceptionmensaje de error es el siguiente:
-
No se pudo encontrar una implementación de sistema de archivos para el esquema 'hdfs'. El esquema no es compatible directamente con Flink y no se pudo cargar ningún sistema de archivos Hadoop para admitir este esquema.
-
org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Hadoop no está en la ruta de clases / dependencias
Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Hadoop is not in the classpath/dependencies.
at org.apache.flink.core.fs.UnsupportedSchemeFactory.create(UnsupportedSchemeFactory.java:58)
at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:446)
... 29 more
2020-10-18 22:25:31,370 ERROR org.apache.flink.runtime.webmonitor.handlers.JarRunHandler - Unhandled exception.
org.apache.flink.runtime.client.JobSubmissionException: Failed to submit job.
at org.apache.flink.runtime.dispatcher.Dispatcher.lambda$internalSubmitJob$3(Dispatcher.java:336)
at java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:822)
at java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:797)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:44)
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.RuntimeException: org.apache.flink.runtime.client.JobExecutionException: Could not set up JobManager
at org.apache.flink.util.function.CheckedSupplier.lambda$unchecked$0(CheckedSupplier.java:36)
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
... 6 more
Caused by: org.apache.flink.runtime.client.JobExecutionException: Could not set up JobManager
at org.apache.flink.runtime.jobmaster.JobManagerRunnerImpl.<init>(JobManagerRunnerImpl.java:152)
at org.apache.flink.runtime.dispatcher.DefaultJobManagerRunnerFactory.createJobManagerRunner(DefaultJobManagerRunnerFactory.java:84)
at org.apache.flink.runtime.dispatcher.Dispatcher.lambda$createJobManagerRunner$6(Dispatcher.java:379)
at org.apache.flink.util.function.CheckedSupplier.lambda$unchecked$0(CheckedSupplier.java:34)
... 7 more
Caused by: org.apache.flink.util.FlinkRuntimeException: Failed to create checkpoint storage at checkpoint coordinator side.
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.<init>(CheckpointCoordinator.java:282)
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.<init>(CheckpointCoordinator.java:205)
at org.apache.flink.runtime.executiongraph.ExecutionGraph.enableCheckpointing(ExecutionGraph.java:486)
at org.apache.flink.runtime.executiongraph.ExecutionGraphBuilder.buildGraph(ExecutionGraphBuilder.java:338)
at org.apache.flink.runtime.scheduler.SchedulerBase.createExecutionGraph(SchedulerBase.java:255)
at org.apache.flink.runtime.scheduler.SchedulerBase.createAndRestoreExecutionGraph(SchedulerBase.java:227)
at org.apache.flink.runtime.scheduler.SchedulerBase.<init>(SchedulerBase.java:215)
at org.apache.flink.runtime.scheduler.DefaultScheduler.<init>(DefaultScheduler.java:120)
at org.apache.flink.runtime.scheduler.DefaultSchedulerFactory.createInstance(DefaultSchedulerFactory.java:105)
at org.apache.flink.runtime.jobmaster.JobMaster.createScheduler(JobMaster.java:278)
at org.apache.flink.runtime.jobmaster.JobMaster.<init>(JobMaster.java:266)
at org.apache.flink.runtime.jobmaster.factories.DefaultJobMasterServiceFactory.createJobMasterService(DefaultJobMasterServiceFactory.java:98)
at org.apache.flink.runtime.jobmaster.factories.DefaultJobMasterServiceFactory.createJobMasterService(DefaultJobMasterServiceFactory.java:40)
at org.apache.flink.runtime.jobmaster.JobManagerRunnerImpl.<init>(JobManagerRunnerImpl.java:146)
... 10 more
Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Could not find a file system implementation for scheme 'hdfs'. The scheme is not directly support
ed by Flink and no Hadoop file system to support this scheme could be loaded.
at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:450)
at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:362)
at org.apache.flink.core.fs.Path.getFileSystem(Path.java:298)
at org.apache.flink.runtime.state.filesystem.FsCheckpointStorage.<init>(FsCheckpointStorage.java:64)
at org.apache.flink.runtime.state.filesystem.FsStateBackend.createCheckpointStorage(FsStateBackend.java:490)
at org.apache.flink.contrib.streaming.state.RocksDBStateBackend.createCheckpointStorage(RocksDBStateBackend.java:477)
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.<init>(CheckpointCoordinator.java:279)
... 23 more
Motivo: la versión de Flink utilizada no contiene dependencias relacionadas con Hadoop
Solución:
- 1. Vaya al sitio web oficial de hadoop para descargar las dependencias relacionadas y agréguelas al directorio lib de Hadoop
- https://flink.apache.org/downloads.html
- 2. Exportar el directorio conf de hadoop
Información relacionada:
https://stackoverflow.com/questions/48784558/flink-no-filesystem-for-scheme-hdfs
La dirección de descarga del paquete jar está directamente en:
https://repo.maven.apache.org/maven2/org/apache/flink/flink-shaded-hadoop-2-uber/2.7.5-7.0/flink-shaded -hadoop-2- uber-2.7.5-7.0.jar