Error close failed in file object destructor during stream ingestion

I was trying to do stream ingestion but it gives me an error: close failed in file object destructor. I have added my server.json file and was just trying to ingest some basic data while following the tutorial on druid.io. I am not sure where I went wrong. I am extremely sorry if it is a stupid question but I am beginner and trying to understand druid.
The data I was trying to input was

{“time”: “2018-03-08T15:04:10Z”, “ulr”: “/foo/bar”, “use”: “alice”, “latency”: 32}

{“time”: “2018-03-08T15:04:10Z”, “ulr”: “/”, “user”: “bob”, “latency”: 11}

{“time”: “2018-03-08T15:04:10Z”, “url”: “/foo/bar”, “user”: “bob”, “latencyMs”: 45}

The server.json file is:

{

“dataSources” : {

"pageview1" : {

  "spec" : {

    "dataSchema" : {

      "dataSource" : "pageview1",

      "parser" : {

        "type" : "string",

        "parseSpec" : {

          "timestampSpec" : {

            "column" : "time",

            "format" : "auto"

          },

          "dimensionsSpec" : {

            "dimensions" : ["url", "user"],

            "dimensionExclusions" : [

            ]

          },

          "format" : "json"

        }

      },

      "granularitySpec" : {

        "type" : "uniform",

        "segmentGranularity" : "hour",

        "queryGranularity" : "none"

      },

      "metricsSpec" : [

        {

          "type" : "count",

          "name" : "views"

        },

        {

          "name" : "latency",

          "type" : "doubleSum",

          "fieldName" : "latency"

        }

      ]

    },

    "ioConfig" : {

      "type" : "realtime"

    },

    "tuningConfig" : {

      "type" : "realtime",

      "maxRowsInMemory" : "100000",

      "intermediatePersistPeriod" : "PT10M",

      "windowPeriod" : "PT10M"

    }

  },

  "properties" : {

    "task.partitions" : "1",

    "task.replicants" : "1"

  }

}

},

“properties” : {

"zookeeper.connect" : "localhost",

"druid.discovery.curator.path" : "/druid/discovery",

"druid.selectors.indexing.serviceName" : "druid/overlord",

"http.port" : "8200",

"http.threads" : "8"

}

}

``