多线程向flink集群提交任务失败

Question

Caused by: org.apache.flink.client.program.ProgramInvocationException: The program execution failed: Could not upload the program's JAR files to the JobManager.
at org.apache.flink.client.program.ClusterClient.runDetached(ClusterClient.java:454)
at org.apache.flink.client.program.StandaloneClusterClient.submitJob(StandaloneClusterClient.java:99)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:400)
at org.apache.flink.client.program.DetachedEnvironment.finalizeExecute(DetachedEnvironment.java:76)
at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:345)
... 14 common frames omitted
Caused by: org.apache.flink.runtime.client.JobSubmissionException: Could not upload the program's JAR files to the JobManager.
at org.apache.flink.runtime.client.JobClient.submitJobDetached(JobClient.java:410)
at org.apache.flink.client.program.ClusterClient.runDetached(ClusterClient.java:451)
... 19 common frames omitted
Caused by: java.io.IOException: Could not retrieve the JobManager's blob port.
at org.apache.flink.runtime.blob.BlobClient.uploadJarFiles(BlobClient.java:745)
at org.apache.flink.runtime.jobgraph.JobGraph.uploadUserJars(JobGraph.java:565)
at org.apache.flink.runtime.client.JobClient.submitJobDetached(JobClient.java:407)
... 20 common frames omitted
Caused by: java.io.IOException: PUT operation failed: Could not transfer error message
at org.apache.flink.runtime.blob.BlobClient.putInputStream(BlobClient.java:512)
at org.apache.flink.runtime.blob.BlobClient.put(BlobClient.java:374)
at org.apache.flink.runtime.blob.BlobClient.uploadJarFiles(BlobClient.java:771)
at org.apache.flink.runtime.blob.BlobClient.uploadJarFiles(BlobClient.java:740)
... 22 common frames omitted
Caused by: java.io.IOException: Could not transfer error message
at org.apache.flink.runtime.blob.BlobClient.readExceptionFromStream(BlobClient.java:799)
at org.apache.flink.runtime.blob.BlobClient.receivePutResponseAndCompare(BlobClient.java:537)
at org.apache.flink.runtime.blob.BlobClient.putInputStream(BlobClient.java:508)
... 25 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.ipc.RemoteException
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:64)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2000)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:501)
at java.lang.Throwable.readObject(Throwable.java:914)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1900)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:290)
at org.apache.flink.runtime.blob.BlobClient.readExceptionFromStream(BlobClient.java:795)
... 27 common frames omitted

Answer 1

自己回复一下 对于flink提交任务时 会将任务对应的jar文件上传至远程主机（如何上传因集群部署方式不同而不同），最终存储到hdfs上，然后taskmanager会去hdfs上下载此文件。
上传文件时，会生成对应的文件名，而文件名是根据jar包的字节码生成的（极端的说，即便jar包对应的源代码中多了一个空格，生成的文件名都不会相同）。
所以，同一个jar会生成同样的文件名，而它又在同样的路径中，这时就会出现多线程对同一文件读写，典型的多线程访问同一资源的问题。这也就是导致上述问题的根源。