Keeps print log file if failed to call sinks, even after dropping the rule

[jinfahua]

Take following steps to reproduce the problem.

• Stream definition

  create stream 'demo() WITH (FORMAT="JSON", DATASOURCE="devices/")'

• Rule definition

{
  "sql": "SELECT * FROM demo",
  "actions": [
    {
      "log": {}
    },
    {
      "rest": {
        "url": "http://localhost:8888",
        "method": "Get",
        "dataTemplate": "{\"hello\": 3}",
        "sendSingle": true
      }
    }
  ]
}

• Install & start EMQ Broker at localhost:1883
• A web server listen at 8888 port, but server should return 404 if accessing the endpoint (to report an error when call rest sink)
• Use any MQTT client tool to send a JSON message, such as {"temperature": 12, "humidity" : 15}
• Following error message print in the log file

time="2020-05-15T09:02:42+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:02:43+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:02:44+08:00" level=info msg="save cache for rule rule1" file="sink_cache.go:126" rule=rule1
time="2020-05-15T09:02:44+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:02:45+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:02:46+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1

It still print these message even after the rule is drop, bin/cli drop rule rule1

time="2020-05-15T09:03:40+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="sink node sink_log instance 0 done" file="sink_node.go:185" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="unary operator preprocessor_demo instance 0 cancelling...." file="operations.go:153" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="unary operator preprocessor_demo instance 0 done, cancelling future items" file="operations.go:108" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="unary operator project instance 0 cancelling...." file="operations.go:153" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="unary operator project instance 0 done, cancelling future items" file="operations.go:108" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="source demo done" file="source_node.go:119" rule=rule1
time="2020-05-15T09:03:40+08:00" level=info msg="Mqtt Source instance 0 Done" file="mqtt_source.go:175" rule=rule1
time="2020-05-15T09:03:41+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:03:42+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:03:43+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:03:44+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:03:45+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1
time="2020-05-15T09:03:46+08:00" level=warning msg="sink node sink_rest instance 0 publish {\"hello\": 3} error: rest sink fails to err http return code: 404." file="sink_node.go:272" rule=rule1

Any workaround for this? Yes, add retryInterval to avoid keeping trying to re-send the result.

{
  "sql": "SELECT * FROM demo",
  "actions": [
    {
      "log": {}
    },
    {
      "rest": {
        "url": "http://localhost:9443",
        "method": "Get",
        "retryInterval": -1,
        "dataTemplate": "{\"hello\": 3}",
        "sendSingle": true
      }
    }
  ]
}

[jinfahua]

Fixed & close the issue.