報錯：Flink Hadoop is not in the classpath/dependencies
阿新 • • 發佈：2022-04-18
報錯背景
安裝Flink on yarn叢集，Flink叢集無法啟動。
版本：
flink-1.14.4
hadoop-3.2.3
報錯現象
2022-04-18 10:22:31,395 ERROR org.apache.flink.runtime.entrypoint.ClusterEntrypoint [] - Could not start cluster entrypoint StandaloneSessionClusterEntrypoint. org.apache.flink.runtime.entrypoint.ClusterEntrypointException: Failed to initialize the cluster entrypoint StandaloneSessionClusterEntrypoint. at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.startCluster(ClusterEntrypoint.java:216) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.runClusterEntrypoint(ClusterEntrypoint.java:617) [flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.StandaloneSessionClusterEntrypoint.main(StandaloneSessionClusterEntrypoint.java:59) [flink-dist_2.12-1.14.4.jar:1.14.4] Caused by: java.io.IOException: Could not create FileSystem for highly available storage path (hdfs://flink/ha/default) at org.apache.flink.runtime.blob.BlobUtils.createFileSystemBlobStore(BlobUtils.java:92) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.blob.BlobUtils.createBlobStoreFromConfig(BlobUtils.java:76) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.highavailability.HighAvailabilityServicesUtils.createHighAvailabilityServices(HighAvailabilityServicesUtils.java:121) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.createHaServices(ClusterEntrypoint.java:361) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.initializeServices(ClusterEntrypoint.java:318) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.runCluster(ClusterEntrypoint.java:243) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.lambda$startCluster$1(ClusterEntrypoint.java:193) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:28) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.startCluster(ClusterEntrypoint.java:190) ~[flink-dist_2.12-1.14.4.jar:1.14.4] ... 2 more Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Could not find a file system implementation for scheme 'hdfs'. The scheme is not directly supported by Flink and no Hadoop file system to support this scheme could be loaded. For a full list of supported file systems, please see https://nightlies.apache.org/flink/flink-docs-stable/ops/filesystems/. at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:532) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:409) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.core.fs.Path.getFileSystem(Path.java:274) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.blob.BlobUtils.createFileSystemBlobStore(BlobUtils.java:89) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.blob.BlobUtils.createBlobStoreFromConfig(BlobUtils.java:76) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.highavailability.HighAvailabilityServicesUtils.createHighAvailabilityServices(HighAvailabilityServicesUtils.java:121) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.createHaServices(ClusterEntrypoint.java:361) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.initializeServices(ClusterEntrypoint.java:318) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.runCluster(ClusterEntrypoint.java:243) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.lambda$startCluster$1(ClusterEntrypoint.java:193) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:28) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.startCluster(ClusterEntrypoint.java:190) ~[flink-dist_2.12-1.14.4.jar:1.14.4] ... 2 more Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Hadoop is not in the classpath/dependencies. at org.apache.flink.core.fs.UnsupportedSchemeFactory.create(UnsupportedSchemeFactory.java:55) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:528) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:409) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.core.fs.Path.getFileSystem(Path.java:274) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.blob.BlobUtils.createFileSystemBlobStore(BlobUtils.java:89) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.blob.BlobUtils.createBlobStoreFromConfig(BlobUtils.java:76) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.highavailability.HighAvailabilityServicesUtils.createHighAvailabilityServices(HighAvailabilityServicesUtils.java:121) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.createHaServices(ClusterEntrypoint.java:361) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.initializeServices(ClusterEntrypoint.java:318) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.runCluster(ClusterEntrypoint.java:243) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.lambda$startCluster$1(ClusterEntrypoint.java:193) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:28) ~[flink-dist_2.12-1.14.4.jar:1.14.4] at org.apache.flink.runtime.entrypoint.ClusterEntrypoint.startCluster(ClusterEntrypoint.java:190) ~[flink-dist_2.12-1.14.4.jar:1.14.4] ... 2 more
報錯原因
Flink訪問HDFS需要兩個jar包依賴，Flink自身沒有，需要自己放進去。
flink-shaded-hadoop-3-3.1.1.7.2.9.0-173-9.0.jar
commons-cli-1.5.0.jar
報錯解決
直接在maven倉庫裡搜尋這兩個jar包即可下載：https://mvnrepository.com/
將jar包放入 /flink/lib 目錄下。