我正在尝试为 GCS 中的 flink 作业配置检查点。
如果我在本地运行测试作业(没有 docker 和任何集群设置),一切正常,但如果我使用 docker-compose 或集群设置运行它并在 flink 仪表板中使用作业部署 fat jar,则一切都会失败并出现错误。
有什么想法吗?
谢谢!
Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Could not find a file system implementation for scheme 'gs'. The scheme is not directly supported by Flink and no Hadoop file system to support this scheme could be loaded.
at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:405)
at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:320)
at org.apache.flink.core.fs.Path.getFileSystem(Path.java:298)
at org.apache.flink.runtime.state.filesystem.FsCheckpointStorage.<init>(FsCheckpointStorage.java:61)
at org.apache.flink.runtime.state.filesystem.FsStateBackend.createCheckpointStorage(FsStateBackend.java:441)
at org.apache.flink.contrib.streaming.state.RocksDBStateBackend.createCheckpointStorage(RocksDBStateBackend.java:379)
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.<init>(CheckpointCoordinator.java:247)
... 33 more
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:64)
at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:401)
环境配置是这样的:
StreamExecutionEnvironment env = applicationContext.getBean(StreamExecutionEnvironment.class);
CheckpointConfig checkpointConfig = env.getCheckpointConfig();
checkpointConfig.setFailOnCheckpointingErrors(false);
checkpointConfig.setCheckpointInterval(10000);
checkpointConfig.setMinPauseBetweenCheckpoints(5000);
checkpointConfig.setMaxConcurrentCheckpoints(1);
checkpointConfig.setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE);
RocksDBStateBackend rocksDBStateBackend = new RocksDBStateBackend(
String.format("gs://checkpoints/%s", jobClass.getSimpleName()), true);
env.setStateBackend((StateBackend) rocksDBStateBackend);
这是我的core-site.xml
file:
<configuration>
<property>
<name>google.cloud.auth.service.account.enable</name>
<value>true</value>
</property>
<property>
<name>google.cloud.auth.service.account.json.keyfile</name>
<value>${user.dir}/key.json</value>
</property>
<property>
<name>fs.gs.impl</name>
<value>com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystem</value>
<description>The FileSystem for gs: (GCS) uris.</description>
</property>
<property>
<name>fs.AbstractFileSystem.gs.impl</name>
<value>com.google.cloud.hadoop.fs.gcs.GoogleHadoopFS</value>
<description>The AbstractFileSystem for gs: (GCS) uris.</description>
</property>
<property>
<name>fs.gs.application.name.suffix</name>
<value>-kube-flink</value>
<description>
Appended to the user-agent header for API requests to GCS to help identify
the traffic as coming from Dataproc.
</description>
</property>
对 gcs-connector 的依赖:
<dependency>
<groupId>com.google.cloud.bigdataoss</groupId>
<artifactId>gcs-connector</artifactId>
<version>1.9.4-hadoop2</version>
</dependency>
UPDATE:
经过一些依赖项的操作后,我已经能够编写检查点了。我当前的设置是:
<dependency>
<groupId>com.google.cloud.bigdataoss</groupId>
<artifactId>gcs-connector</artifactId>
<version>hadoop2-1.9.5</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-statebackend-rocksdb_${scala.version}</artifactId>
<version>1.5.1</version>
</dependency>
我还把flink镜像切换到了版本flink:1.5.2-hadoop28
不幸的是,我仍然无法读取检查点数据,因为我的工作总是无法恢复状态并出现错误:
java.lang.NoClassDefFoundError: com/google/cloud/hadoop/gcsio/GoogleCloudStorageImpl$6
at com.google.cloud.hadoop.gcsio.GoogleCloudStorageImpl.open(GoogleCloudStorageImpl.java:666)
at com.google.cloud.hadoop.gcsio.GoogleCloudStorageFileSystem.open(GoogleCloudStorageFileSystem.java:323)
at com.google.cloud.hadoop.fs.gcs.GoogleHadoopFSInputStream.<init>(GoogleHadoopFSInputStream.java:136)
at com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystemBase.open(GoogleHadoopFileSystemBase.java:1102)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:787)
at org.apache.flink.runtime.fs.hdfs.HadoopFileSystem.open(HadoopFileSystem.java:119)
at org.apache.flink.runtime.fs.hdfs.HadoopFileSystem.open(HadoopFileSystem.java:36)
at org.apache.flink.core.fs.SafetyNetWrapperFileSystem.open(SafetyNetWrapperFileSystem.java:80)
at org.apache.flink.runtime.state.filesystem.FileStateHandle.openInputStream(FileStateHandle.java:68)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend$RocksDBIncrementalRestoreOperation.copyStateDataHandleData(RocksDBKeyedStateBackend.java:1005)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend$RocksDBIncrementalRestoreOperation.transferAllDataFromStateHandles(RocksDBKeyedStateBackend.java:988)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend$RocksDBIncrementalRestoreOperation.transferAllStateDataToDirectory(RocksDBKeyedStateBackend.java:974)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend$RocksDBIncrementalRestoreOperation.restoreInstance(RocksDBKeyedStateBackend.java:758)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend$RocksDBIncrementalRestoreOperation.restore(RocksDBKeyedStateBackend.java:732)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend.restore(RocksDBKeyedStateBackend.java:443)
at org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend.restore(RocksDBKeyedStateBackend.java:149)
at org.apache.flink.streaming.api.operators.BackendRestorerProcedure.attemptCreateAndRestore(BackendRestorerProcedure.java:151)
at org.apache.flink.streaming.api.operators.BackendRestorerProcedure.createAndRestore(BackendRestorerProcedure.java:123)
at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.keyedStatedBackend(StreamTaskStateInitializerImpl.java:276)
at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.streamOperatorStateContext(StreamTaskStateInitializerImpl.java:132)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:227)
at org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:730)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:295)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:703)
at java.lang.Thread.run(Thread.java:748)
我相信这将是最后一个错误......