hi when I do some hive basic query like "select * from table" using  Mapred execution engine, my job is failing with these kind of errors:   upon execution:   Yarn Logs: Error: could not find or load main class 800   RM logs: == USER=user OPERATION=Application Finished - Failed TARGET=RMAppManager RESULT=FAILURE DESCRIPTION=App failed with state: FAILED PERMISSIONS=Application application_1591667296620_0286 failed 2 times due to AM Container for appattempt_1591667296620_0286_000002 exited with exitCode: 1 Failing this attempt.Diagnostics: [2020-06-10 12:14:43.978]Exception from container-launch. Container id: container_1591667296620_0286_02_000001 Exit code: 1 [2020-06-10 12:14:43.979]Container exited with a non-zero exit code 1. Error file: prelaunch.err. Last 4096 bytes of prelaunch.err : Last 4096 bytes of stderr : Error: Could not find or load main class 800 [2020-06-10 12:14:43.981]Container exited with a non-zero exit code 1. Error file: prelaunch.err. Last 4096 bytes of prelaunch.err : Last 4096 bytes of stderr : Error: Could not find or load main class 800 For more detailed output, check the application tracking page: https://clouderacluster:8088/cluster/app/application_1591667296620_0286 Then click on links to logs of each attempt. . Failing the application. APPID=application_1591667296620_0286   ... View more