报错内容

flink 执行 jar 时，报如下错误：

org.apache.flink.client.program.ProgramInvocationException: Job failed. (JobID: b67d4b36791bb6d1be532323b4f77162)
	at org.apache.flink.client.program.rest.RestClusterClient.submitJob(RestClusterClient.java:268)
	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:486)
	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:474)
	at org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:62)
	at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:816)
	at org.apache.flink.api.java.DataSet.collect(DataSet.java:413)
	at org.apache.flink.api.java.DataSet.print(DataSet.java:1652)
	at org.apache.flink.examples.java.wordcount.WordCount.main(WordCount.java:88)
	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:498)
	at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:529)
	at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:421)
	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:426)
	at org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:816)
	at org.apache.flink.client.cli.CliFrontend.runProgram(CliFrontend.java:290)
	at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:216)
	at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1053)
	at org.apache.flink.client.cli.CliFrontend.lambda$main$11(CliFrontend.java:1129)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1836)
	at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
	at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1129)
Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
	at org.apache.flink.runtime.jobmaster.JobResult.toJobExecutionResult(JobResult.java:146)
	at org.apache.flink.client.program.rest.RestClusterClient.submitJob(RestClusterClient.java:265)
	... 24 more
Caused by: java.io.IOException: Error opening the Input Split file:/opt/module/logs/student.txt [0,144]: /opt/module/logs/student.txt (没有那个文件或目录)
	at org.apache.flink.api.common.io.FileInputFormat.open(FileInputFormat.java:824)
	at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:470)
	at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:47)
	at org.apache.flink.runtime.operators.DataSourceTask.invoke(DataSourceTask.java:170)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.FileNotFoundException: /opt/module/logs/student.txt (没有那个文件或目录)
	at java.io.FileInputStream.open0(Native Method)
	at java.io.FileInputStream.open(FileInputStream.java:195)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at org.apache.flink.core.fs.local.LocalDataInputStream.<init>(LocalDataInputStream.java:50)
	at org.apache.flink.core.fs.local.LocalFileSystem.open(LocalFileSystem.java:142)
	at org.apache.flink.api.common.io.FileInputFormat$InputSplitOpenThread.run(FileInputFormat.java:996)

问题原因

1. 输入路径确实不存在该文件；
2. 输入路径的文件并不在 flink 集群的 TaskManager 上，而放在了 JobManager 节点上了。

解决方式

1. 对于不存在的文件，修改为有该文件的路径；
2. 如果 flink 输入文件的是本地文件，则需要将该文件放在 TaskManager 节点上（即 slaves 节点）；