Zhankun Tang created YARN-8798:
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             Summary: [Submarine] Job should not be submitted if "--input_path" 
option is missing
                 Key: YARN-8798
                 URL: https://issues.apache.org/jira/browse/YARN-8798
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Zhankun Tang
            Assignee: Zhankun Tang
             Fix For: 3.2.0


If a user doesn't set "–input_path" option, the job will still be submitted. 
Here is my command to run the job:
{code:java}
yarn jar 
$HADOOP_BASE_DIR/home/share/hadoop/yarn/hadoop-yarn-submarine-3.2.0-SNAPSHOT.jar
 job run \
 -verbose \
 -wait_job_finish \
 --env DOCKER_JAVA_HOME=/usr/lib/jvm/java-8-oracle \
 --env DOCKER_HADOOP_HDFS_HOME=/hadoop-3.2.0-SNAPSHOT \
 --name tf-job-001 \
 --docker_image tangzhankun/tensorflow \
 --worker_resources memory=4G,vcores=2 \
 --worker_launch_cmd "cd /cifar10_estimator && python cifar10_main.py 
--data-dir=%input_path% --job-dir=%checkpoint_path% --num-gpus=0 
--train-steps=5"{code}
Due to lack of invalidity check, the job is still submitted. We should add a 
check on this.



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