YARN-8798. [Submarine] Job should not be submitted if --input_path option is missing. (Zhankun Tang via wangda)

Change-Id: I7ae0e44eb5179b04a6ac861ec1c65f3b18c38f0f
(cherry picked from commit 143d74775b)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-submarine/src/main/java/org/apache/hadoop/yarn/submarine/client/cli/param/RunJobParameters.java

@@ -62,6 +62,12 @@ public class RunJobParameters extends RunParameters {
     if (parsedCommandLine.getOptionValue(CliConstants.N_WORKERS) != null) {
       nWorkers = Integer.parseInt(
           parsedCommandLine.getOptionValue(CliConstants.N_WORKERS));
+      // Only check null value.
+      // Training job shouldn't ignore INPUT_PATH option
+      // But if nWorkers is 0, INPUT_PATH can be ignored because user can only run Tensorboard
+      if (null == input && 0 != nWorkers) {
+        throw new ParseException("\"--" + CliConstants.INPUT_PATH + "\" is absent");
+      }
     }
 
     int nPS = 0;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-submarine/src/test/java/org/apache/hadoop/yarn/submarine/client/cli/TestRunJobCliParsing.java

@@ -19,6 +19,7 @@
 
 package org.apache.hadoop.yarn.submarine.client.cli;
 
+import org.apache.commons.cli.ParseException;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.api.records.ResourceInformation;
@@ -135,6 +136,44 @@ public class TestRunJobCliParsing {
     Assert.assertTrue(jobRunParameters.isWaitJobFinish());
   }
 
+  @Test
+  public void testNoInputPathOptionSpecified() throws Exception {
+    RunJobCli runJobCli = new RunJobCli(getMockClientContext());
+    String expectedErrorMessage = "\"--" + CliConstants.INPUT_PATH + "\" is absent";
+    String actualMessage = "";
+    try {
+      runJobCli.run(
+          new String[]{"--name", "my-job", "--docker_image", "tf-docker:1.1.0",
+              "--checkpoint_path", "hdfs://output",
+              "--num_workers", "1", "--worker_launch_cmd", "python run-job.py",
+              "--worker_resources", "memory=4g,vcores=2", "--tensorboard",
+              "true", "--verbose", "--wait_job_finish"});
+    } catch (ParseException e) {
+      actualMessage = e.getMessage();
+      e.printStackTrace();
+    }
+    Assert.assertEquals(expectedErrorMessage, actualMessage);
+  }
+
+  /**
+   * when only run tensorboard, input_path is not needed
+   * */
+  @Test
+  public void testNoInputPathOptionButOnlyRunTensorboard() throws Exception {
+    RunJobCli runJobCli = new RunJobCli(getMockClientContext());
+    boolean success = true;
+    try {
+      runJobCli.run(
+          new String[]{"--name", "my-job", "--docker_image", "tf-docker:1.1.0",
+              "--num_workers", "0", "--tensorboard", "--verbose",
+              "--tensorboard_resources", "memory=2G,vcores=2",
+              "--tensorboard_docker_image", "tb_docker_image:001"});
+    } catch (ParseException e) {
+      success = false;
+    }
+    Assert.assertTrue(success);
+  }
+
   @Test
   public void testLaunchCommandPatternReplace() throws Exception {
     RunJobCli runJobCli = new RunJobCli(getMockClientContext());