hadoop - 无法将点/检查点flink状态保存到AWS S3存储桶

Question

我正在尝试检查/保存我在EMR上运行的flink状态到AWS上的s3存储桶。请注意:

实例(主节点和核心节点)具有正确设置的IAM角色，以访问s3存储桶及其中的所有目录/文件(AmazonS3FullAccess策略已附加到该角色，没有任何内容可以覆盖它)。

我可以成功使用从属节点和主节点中的aws s3 cp xxx s3://flink-bc/checkpoints将文件复制到存储桶中

使用hdfs进行保存点/检查点工作

如果我将检查点设置为使用hdfs，然后尝试将savepoint设置为s3，则savepoint操作错误看起来像

org.apache.flink.util.FlinkException: Triggering a savepoint for the job 16c162c47f225cddad974056c9494b6d failed.
    at org.apache.flink.client.cli.CliFrontend.triggerSavepoint(CliFrontend.java:723)
    at org.apache.flink.client.cli.CliFrontend.lambda$savepoint$9(CliFrontend.java:701)
    at org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:985)
    at org.apache.flink.client.cli.CliFrontend.savepoint(CliFrontend.java:698)
    at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1065)
    at org.apache.flink.client.cli.CliFrontend.lambda$main$11(CliFrontend.java:1126)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1844)
    at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
    at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1126)
Caused by: java.util.concurrent.CompletionException: java.util.concurrent.CompletionException: org.apache.flink.runtime.checkpoint.CheckpointTriggerException: Failed to trigger savepoint. Decline reason: An Exception occurred while triggering the checkpoint.........
Caused by: java.util.concurrent.CompletionException: org.apache.flink.runtime.checkpoint.CheckpointTriggerException: Failed to trigger savepoint. Decline reason: An Exception occurred while triggering the checkpoint.
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292) 

并且jobmanager记录:

java.io.IOException: Cannot instantiate file system for URI: s3://flink-bc/savepoints
    at org.apache.flink.runtime.fs.hdfs.HadoopFsFactory.create(HadoopFsFactory.java:187)
    at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:399)
    at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:318)
    at org.apache.flink.core.fs.Path.getFileSystem(Path.java:298)
    at org.apache.flink.runtime.state.filesystem.AbstractFsCheckpointStorage.initializeLocationForSavepoint(AbstractFsCheckpointStorage.java:147)
    at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.triggerCheckpoint(CheckpointCoordinator.java:511)
    at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.triggerSavepoint(CheckpointCoordinator.java:370)
    at org.apache.flink.runtime.jobmaster.JobMaster.triggerSavepoint(JobMaster.java:951)

Answer 1

在使用最新的Flink版本(1.10.0)和s3将检查点存储在s3存储桶中时，我遇到了类似的问题。
因此，请找到我提供的详细工作答案here。