[FLINK-32241] UnsupportedFileSystemException when using the ABFS Hadoop driver for checkpointing in Flink 1.17

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.17.0, 1.17.1
• Component/s: FileSystems, Runtime / Checkpointing

Environment

Flink 1.17.1

Hadoop 3.3.4

Flink Operator 1.4.0

Kubernetes 1.24

• Assignee: Unassigned
• Reporter: Anton Ippolitov
• Created: 01/Jun/23 13:34
• Updated: 03/Jan/24 09:09

Description

https://issues.apache.org/jira/browse/HADOOP-18707 introduced a new functionality in the ABFS Hadoop client which buffers data on local disk by default.

It looks like this breaks with Flink 1.17 in a scenario where:

• ABFS is used for checkpointing
• JobManager HA is enabled
• First JobManager leader dies and a stand-by JobManager takes over

I can reliably reproduce this with Flink 1.17.1 running on Kubernetes by simply killing the JM leader pod. Once the stand-by JobManager takes over, all checkpoints consistently fail with the following error:

org.apache.flink.runtime.checkpoint.CheckpointException: Failure to finalize checkpoint. at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.finalizeCheckpoint(CheckpointCoordinator.java:1424) at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.completePendingCheckpoint(CheckpointCoordinator.java:1310) at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.receiveAcknowledgeMessage(CheckpointCoordinator.java:1202) at org.apache.flink.runtime.scheduler.ExecutionGraphHandler.lambda$acknowledgeCheckpoint$1(ExecutionGraphHandler.java:89) at org.apache.flink.runtime.scheduler.ExecutionGraphHandler.lambda$processCheckpointCoordinatorMessage$3(ExecutionGraphHandler.java:119) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: org.apache.hadoop.fs.UnsupportedFileSystemException: No FileSystem for scheme "file" at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:3443) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3466) at org.apache.hadoop.fs.FileSystem.access$300(FileSystem.java:174) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3574) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3521) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:540) at org.apache.hadoop.fs.FileSystem.getLocal(FileSystem.java:496) at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:316) at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:393) at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:165) at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:146) at org.apache.hadoop.fs.store.DataBlocks$DiskBlockFactory.createTmpFileForWrite(DataBlocks.java:980) at org.apache.hadoop.fs.store.DataBlocks$DiskBlockFactory.create(DataBlocks.java:960) at org.apache.hadoop.fs.azurebfs.services.AbfsOutputStream.createBlockIfNeeded(AbfsOutputStream.java:262) at org.apache.hadoop.fs.azurebfs.services.AbfsOutputStream.<init>(AbfsOutputStream.java:173) at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.createFile(AzureBlobFileSystemStore.java:580) at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.create(AzureBlobFileSystem.java:301) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1195) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1175) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1064) at org.apache.flink.fs.azure.common.hadoop.HadoopFileSystem.create(HadoopFileSystem.java:154) at org.apache.flink.fs.azure.common.hadoop.HadoopFileSystem.create(HadoopFileSystem.java:37) at org.apache.flink.core.fs.PluginFileSystemFactory$ClassLoaderFixingFileSystem.create(PluginFileSystemFactory.java:170) at org.apache.flink.runtime.state.filesystem.FSDataOutputStreamWrapper.<init>(FSDataOutputStreamWrapper.java:42) at org.apache.flink.runtime.state.filesystem.FsCheckpointMetadataOutputStream.getOutputStreamWrapper(FsCheckpointMetadataOutputStream.java:179) at org.apache.flink.runtime.state.filesystem.FsCheckpointMetadataOutputStream.<init>(FsCheckpointMetadataOutputStream.java:64) at org.apache.flink.runtime.state.filesystem.FsCheckpointStorageLocation.createMetadataOutputStream(FsCheckpointStorageLocation.java:116) at org.apache.flink.runtime.checkpoint.PendingCheckpoint.finalizeCheckpoint(PendingCheckpoint.java:330) at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.finalizeCheckpoint(CheckpointCoordinator.java:1410) ... 7 common frames omitted

I am not exactly sure why this works with the first JM and why all of a sudden the local Hadoop FS implementation cannot be loaded on a stand-by JM... I am running with default settings when it comes to Hadoop FS etc.

Anyway, I found a workaround thanks to https://issues.apache.org/jira/browse/SPARK-43188: simply setting fs.azure.data.blocks.buffer to array seems to solve the issue. So this is minor priority.

Issue Links

• is related to: FLINK-30635 Fail to recover for row-format when writing to OSS using FileSystemTable connector