Yarn and Mesos clusters can not be deployed if plugins dir does not exist

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 The program finished with the following exception:\\n\\norg.apache.flink.client.deployment.ClusterDeploymentException: Couldn't deploy Yarn session cluster\\n\\t
at org.apache.flink.yarn.AbstractYarnClusterDescriptor.deploySessionCluster(AbstractYarnClusterDescriptor.java:385)\\n\\t
at org.apache.flink.yarn.cli.FlinkYarnSessionCli.run(FlinkYarnSessionCli.java:616)\\n\\t
at org.apache.flink.yarn.cli.FlinkYarnSessionCli.lambda$main$3(FlinkYarnSessionCli.java:844)\\n\\t
at java.security.AccessController.doPrivileged(Native Method)\\n\\tat javax.security.auth.Subject.doAs(Subject.java:422)\\n\\t
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1836)\\n\\t
at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)\\n\\t
at org.apache.flink.yarn.cli.FlinkYarnSessionCli.main(FlinkYarnSessionCli.java:844)
Caused by: org.apache.flink.yarn.AbstractYarnClusterDescriptor$YarnDeploymentException: The environment variable 'FLINK_PLUGINS_DIR' is set to '/opt/flink/plugins' but the directory doesn't exist. 
at org.apache.flink.yarn.AbstractYarnClusterDescriptor.addEnvFolderToShipFiles(AbstractYarnClusterDescriptor.java:1540)
at org.apache.flink.yarn.AbstractYarnClusterDescriptor.addEnvironmentFoldersToShipFiles(AbstractYarnClusterDescriptor.java:1531)
at org.apache.flink.yarn.AbstractYarnClusterDescriptor.startAppMaster(AbstractYarnClusterDescriptor.java:704)
at org.apache.flink.yarn.AbstractYarnClusterDescriptor.deployInternal(AbstractYarnClusterDescriptor.java:507)
at