错误描述：
通过Flink的UI中的Submit New Job菜单添加jar包的时候提示报错。报错信息的关键字是“The LocalStreamEnvironment cannot be used when submitting a program through a client, or running in a TestEnvironment context”，最关键的是“LocalStreamEnvironment”。
我的Flink服务是单机版启动。
问题原因就是以下这两行代码的区别，报错是因为我用的是“createLocalEnvironment()”
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
// ExecutionEnvironment env = ExecutionEnvironment.createLocalEnvironment();
// getExecutionEnvironment()方法可以根据flink运用程序如何提交判断出是那种模式提交，Local本地提交，Cluster标是standalone提交，Yarn提交好像是YarnCluster
解决办法：使用ExecutionEnvironment.getExecutionEnvironment()
//StreamExecutionEnvironment env = StreamExecutionEnvironment.createLocalEnvironment();
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();以下是详细的内容。
FlinkUI中点击Submit后，弹出的Message完整异常信息参考：
org.apache.flink.runtime.rest.handler.RestHandlerException: Could not execute application.
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleRequest$1(JarRunHandler.java:110)
at java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:822)
at java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:797)
at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1595)
at java.lang.Thread.run(Thread.java:748) Caused by: java.util.concurrent.CompletionException: org.apache.flink.util.FlinkRuntimeException: Could not execute application.
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1592)
... 1 more Caused by: org.apache.flink.util.FlinkRuntimeException: Could not execute application.
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.tryExecuteJobs(DetachedApplicationRunner.java:88)
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.run(DetachedApplicationRunner.java:70)
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleRequest$0(JarRunHandler.java:104)
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
... 1 more Caused by: org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: The LocalStreamEnvironment cannot be used when submitting a program through a client, or running in a TestEnvironment context.
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:372)
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222)
at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114)
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.tryExecuteJobs(DetachedApplicationRunner.java:84)
... 4 more Caused by: org.apache.flink.api.common.InvalidProgramException: The LocalStreamEnvironment cannot be used when submitting a program through a client, or running in a TestEnvironment context.
at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.validateAndGetConfiguration(LocalStreamEnvironment.java:57)
at org.apache.flink.streaming.api.environment.LocalStreamEnvironment.<init>(LocalStreamEnvironment.java:52)
at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.createLocalEnvironment(StreamExecutionEnvironment.java:2259)
at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.createLocalEnvironment(StreamExecutionEnvironment.java:2247)
at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.createLocalEnvironment(StreamExecutionEnvironment.java:2230)
at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.createLocalEnvironment(StreamExecutionEnvironment.java:2218)
at com.xx.XXApplication.main(XXApplication.java:39)
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:355)其实异常信息里面已经提示了关键信息，但是初次接触Flink没有意识到，就是里面的
at com.xx.XXApplication.main(XXApplication.java:39)
39行的代码就是
StreamExecutionEnvironment env = StreamExecutionEnvironment.createLocalEnvironment();
后来参考的网上的信息才意识到问题的根本原因。记录一下，以供参考。
网上还有很多类似的异常信息，需要仔细查看里面的关键字，一定要仔细，问题的原因就在异常信息里面。
以下信息给了我启发
“The RemoteEnvironment cannot be used when submitting a program through a client, or running in a TestEnvironment context.” 这个异常的关键字是“RemoteEnvironment ”
stackoverflow上的一个问答是关于这个异常的，给了我参考。文章来源：https://www.toymoban.com/news/detail-423913.html
https://stackoverflow.com/questions/62876301/the-remoteenvironment-cannot-be-used-when-submitting-a-program-through-a-client文章来源地址https://www.toymoban.com/news/detail-423913.html
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