title: There is no Logs and Stdout in Flink WebUI
body: <p>Recently I have started a cluster of flink with Docker-compose.Here is my file:</p>
  
  <pre><code>version: "2.1"
  services:
    jobmanager:
      image: flink:1.9.2-scala_2.11
      expose:
        - "6123"
      ports:
        - "8081:8081"
      command: jobmanager
      environment:
        - JOB_MANAGER_RPC_ADDRESS=jobmanager
  
    taskmanager:
      image: flink:1.9.2-scala_2.11
      expose:
        - "6121"
        - "6122"
      depends_on:
        - jobmanager
      command: taskmanager
      links:
        - "jobmanager:jobmanager"
      environment:
        - JOB_MANAGER_RPC_ADDRESS=jobmanager
  </code></pre>
  
  <p>I started it with "docker-compose up -d --scale taskmanager=3" to assign 3 taskmanagers.
  I have passed the WordCount Demo and when I input some words in the bash there is no error occurs.</p>
  
  <p>However, I just cannot see the logs and stdout from the WebUI
  <a href="https://i.stack.imgur.com/G90Gr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/G90Gr.png" alt="WebUI"></a></p>