Github user zentol commented on the issue:
https://github.com/apache/flink/pull/2207
This would print the following:
```
./bin/yarn-session.sh -n 5 -s 4 -jm 512
Error while starting the YARN Client: The JobManager memory (512) is below
the minimum required memory amount of 768 MB
java.lang.IllegalArgumentException: The JobManager memory (512) is below
the minimum required memory amount of 768 MB
at
org.apache.flink.yarn.AbstractYarnClusterDescriptor.setJobManagerMemory(AbstractYarnClusterDescriptor.java:166)
at
org.apache.flink.yarn.cli.FlinkYarnSessionCli.createDescriptor(FlinkYarnSessionCli.java:287)
at
org.apache.flink.yarn.cli.FlinkYarnSessionCli.run(FlinkYarnSessionCli.java:563)
at
org.apache.flink.yarn.cli.FlinkYarnSessionCli.main(FlinkYarnSessionCli.java:445)
```
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