我正在尝试配置flink历史服务器。我在这里跟踪了Flink的文件。我可以打开历史服务器，但只能看到已完成的作业，而不能看到正在运行的作业。是我遗漏了什么，还是只是完成的作业显示在历史服务器中。请帮忙。
当前在群集中的作业：
localhost:8081/joboverview

{
    "running": [
        {
            "jid": "e4e6edb76b887054d7aca460b7136937",
            "name": "Filter",
            "state": "RUNNING",
            "start-time": 1505971363801,
            "end-time": -1,
            "duration": 11588615,
            "last-modification": 1505971363832,
            "tasks": {
                "total": 1,
                "pending": 0,
                "running": 1,
                "finished": 0,
                "canceling": 0,
                "canceled": 0,
                "failed": 0
            }
        }
    ],
    "finished": [
        {
            "jid": "ec16f4cf01192268150c750966cefd0d",
            "name": "Flink Java Job at Thu Sep 21 10:52:09 IST 2017",
            "state": "FINISHED",
            "start-time": 1505971329989,
            "end-time": 1505971330746,
            "duration": 757,
            "last-modification": 1505971330746,
            "tasks": {
                "total": 3,
                "pending": 0,
                "running": 0,
                "finished": 3,
                "canceling": 0,
                "canceled": 0,
                "failed": 0
            }
        }
    ]
}

历史服务器中可用的作业
localhost:8082/joboverview

{
    "running": [],
    "finished": [
        {
            "jid": "ec16f4cf01192268150c750966cefd0d",
            "name": "Flink Java Job at Thu Sep 21 10:52:09 IST 2017",
            "state": "FINISHED",
            "start-time": 1505971329989,
            "end-time": 1505971330746,
            "duration": 757,
            "last-modification": 1505971330746,
            "tasks": {
                "total": 3,
                "pending": 0,
                "running": 0,
                "finished": 3,
                "canceling": 0,
                "canceled": 0,
                "failed": 0
            }
        }
    ]
}

flink历史服务器配置：

# ==============================================================================

# HistoryServer

# ==============================================================================

# The HistoryServer is started and stopped via bin/historyserver.sh (start|stop)

# Directory to upload completed jobs to. Add this directory to the list of

# monitored directories of the HistoryServer as well (see below).

jobmanager.archive.fs.dir: hdfs://<hdfs>:8020/sax/flink/jobmanager

# The address under which the web-based HistoryServer listens.

historyserver.web.address: localhost

# The port under which the web-based HistoryServer listens.

historyserver.web.port: 8082

# Comma separated list of directories to monitor for completed jobs.

historyserver.archive.fs.dir: hdfs://<hdfs>:8020/sax/flink/jobmanager

# Interval in milliseconds for refreshing the monitored directories.

historyserver.archive.fs.refresh-interval: 10000