10:49:45.599 [sync-1] [3ea5ea94-d696-42e7-a5ea-94d69642e7c2] INFO  i.g.g.r.h.i.DefaultReactorHandlerRegistry - Registering a new handler for Api{id='3ea5ea94-d696-42e7-a5ea-94d69642e7c2', name='Hello World', version='1.0'} on path /demo/
10:49:45.967 [vert.x-eventloop-thread-0] [] ERROR i.g.e.client.http.HttpClient - Unable to put template mapping: status[500] template[{
    "mappings": {
        "request": {
            "properties": {
                "@timestamp": {
                    "type": "date"
                },
                "api": {
                    "type": "keyword"
                },
                "api-key": {
                    "type": "keyword",
                    "index": false
                },
                    "api-response-time": {
                    "type": "integer"
                },
                "application": {
                    "type": "keyword"
                },
                "endpoint": {
                    "type": "keyword"
                },
                "gateway": {
                    "type": "keyword"
                },
                "local-address": {
                    "type": "keyword",
                    "index": false
                },
                "message": {
                    "type": "keyword",
                    "index": false
                },
                "method": {
                    "type": "short"
                },
                "plan": {
                    "type": "keyword"
                },
                "proxy-latency": {
                    "type": "integer",
                    "index": false
                },
                "remote-address": {
                    "type": "ip",
                    "index": false
                },
                "geoip" : {
                    "properties": {
                        "continent_name": {
                            "type": "keyword",
                            "index": true
                        },
                        "country_iso_code": {
                            "type": "keyword",
                            "index": true
                        },
                        "region_name": {
                            "type": "keyword",
                            "index": true
                        },
                        "city_name": {
                            "type": "keyword",
                            "index": true
                        },
                        "location": {
                            "type": "geo_point"
                        }
                    }
                },
                "request-content-length": {
                    "type": "integer",
                    "index": false
                },
                "response-content-length": {
                    "type": "integer",
                    "index": false
                },
                "response-time": {
                    "type": "integer"
                },
                "status": {
                    "type": "short"
                },
                "tenant": {
                    "type": "keyword"
                },
                "transaction": {
                    "type": "keyword"
                },
                "uri": {
                    "type": "keyword"
                },
                "path": {
                    "type": "keyword"
                },
                "mapped-path": {
                    "type": "keyword"
                },
                "host": {
                    "type": "keyword"
                }
            }
        },
        "monitor": {
            "properties": {
                "gateway": {
                    "type": "keyword"
                },
                "hostname": {
                    "type": "keyword"
                }
            }
        },
        "log": {
            "properties": {
                "client-request": {
                    "type": "object",
                    "enabled": false
                },
                "client-response": {
                    "type": "object",
                    "enabled": false
                },
                "proxy-request": {
                    "type": "object",
                    "enabled": false
                },
                "proxy-response": {
                    "type": "object",
                    "enabled": false
                }
            }
        },
        "health": {
            "properties": {
                "api": {
                    "type": "keyword"
                },
                "available": {
                    "type": "boolean",
                    "index": false
                },
                "endpoint": {
                    "type": "keyword"
                },
                "gateway": {
                    "type": "keyword"
                },
                "response-time": {
                    "type": "integer"
                },
                "state": {
                    "type": "integer",
                    "index": false
                },
                "steps": {
                    "type": "object",
                    "enabled": false
                },
                "success": {
                    "type": "boolean",
                    "index": false
                }
            }
        }
    },
    "settings": {
        "index.number_of_shards":5,
        "index.number_of_replicas":1,
        "index.refresh_interval": "5s"
    },
    "template": "logs-vn-94016-i-demo-gravitee-*"
}] response[{"error":{"root_cause":[{"type":"runtime_exception","reason":"java.lang.NullPointerException"}],"type":"runtime_exception","reason":"java.lang.NullPointerException","caused_by":{"type":"null_pointer_exception","reason":null}},"status":500}]
10:49:45.994 [vert.x-eventloop-thread-0] [] ERROR i.g.r.e.ElasticsearchReporter - An error occurs while creating index mapping template
io.gravitee.elasticsearch.exception.ElasticsearchException: Unable to put template mapping
        at io.gravitee.elasticsearch.client.http.HttpClient.lambda$putTemplate$5(HttpClient.java:206)
        at io.reactivex.internal.operators.single.SingleFlatMapCompletable$FlatMapCompletableObserver.onSuccess(SingleFlatMapCompletable.java:83)
        at io.vertx.reactivex.core.impl.AsyncResultSingle.lambda$subscribeActual$0(AsyncResultSingle.java:46)
        at io.vertx.reactivex.ext.web.client.HttpRequest$4.handle(HttpRequest.java:367)
        at io.vertx.reactivex.ext.web.client.HttpRequest$4.handle(HttpRequest.java:364)
        at io.vertx.ext.web.client.impl.HttpContext.lambda$null$0(HttpContext.java:125)
        at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:339)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.lang.Thread.run(Thread.java:748)