org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: No operators defined in streaming topology. Cannot execute.

The program finished with the following exception:

org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: No operators defined in streaming topology. Cannot execute.
	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.cli.CliFrontend.executeProgram(CliFrontend.java:812)
	at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:246)
	at org.apache.flink.client.cli.CliFrontend.parseAndRun(CliFrontend.java:1054)
	at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:1132)
	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.contexts.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
	at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1132)

报错代码代码基于flink1.1.4.4：

 for (String s : sqls) {
            System.out.println("start to run sql:" + s);
            if (executeSetDialect(tableEnv, s)) {
                continue;
            }
            tableEnv.executeSql(s);
        }
       tableEnv.execute(name);

解决办法：

Flink TableEnvironment 使用 executeSql() 方法已经执行了sql语句，不需要再使用execute()方法。运行execute()方法时，没有待执行的sql语句，因此会抛出此错误。

解决办法：删除tableEnv.execute();即可。