panic error when mocking http request > kafka topic

[openrory]

Hi there,

When I try to mock kafka publising to a topic based on a an HTTP GET request, I get the following error:
INFO[0012] try to publish to kafka err="<nil>" out_message= payload="{ \"kafka\": \"OK\", \"data\": {} " topic=hello_kafka_out echo: http: panic serving 172.17.0.1:60042: runtime error: invalid memory address or nil pointer dereference goroutine 6 [running]: net/http.(*conn).serve.func1(0xc000224000) /usr/local/go/src/net/http/server.go:1769 +0x139 panic(0xab7e00, 0x11c9e20) /usr/local/go/src/runtime/panic.go:522 +0x1b5 github.com/checkr/openmock.(*kafkaClient).sendMessage(0x0, 0xc0001dc220, 0xf, 0xc000288480, 0x112, 0x120, 0x0, 0x0) /go/src/github.com/checkr/openmock/kafka.go:43 +0x170 github.com/checkr/openmock.ActionPublishKafka.Perform(0xc0001dc220, 0xf, 0xc000158120, 0x112, 0x0, 0x0, 0xc9b8c0, 0xc00020a070, 0xc00020c4e0, 0x0, ...) /go/src/github.com/checkr/openmock/handle_actions.go:123 +0x1cd github.com/checkr/openmock.(*Mock).DoActions(0xc0000a1ee0, 0xc9b8c0, 0xc00020a070, 0xc00020c4e0, 0x0, 0x0, 0xc0001dc2b0, 0x5, 0x0, 0x0, ...) /go/src/github.com/checkr/openmock/handle_actions.go:28 +0x192 github.com/checkr/openmock.MocksArray.DoActions(0xc0001bd4e0, 0x2, 0x2, 0xc9b8c0, 0xc00020a070, 0xc00020c4e0, 0x0, 0x0, 0xc0001dc2b0, 0x5, ...) /go/src/github.com/checkr/openmock/handle_actions.go:14 +0x96 github.com/checkr/openmock.(*OpenMock).startHTTP.func2.1(0xc9b8c0, 0xc00020a070, 0x20, 0xafbe60) /go/src/github.com/checkr/openmock/http.go:42 +0x2c2 github.com/labstack/echo.(*Echo).Add.func1(0xc9b8c0, 0xc00020a070, 0x2, 0xc79180) /go/src/github.com/checkr/openmock/vendor/github.com/labstack/echo/echo.go:482 +0x87 github.com/labstack/echo/middleware.BodyDumpWithConfig.func1.1(0xc9b8c0, 0xc00020a070, 0x11f3300, 0x3) /go/src/github.com/checkr/openmock/vendor/github.com/labstack/echo/middleware/body_dump.go:81 +0x375 github.com/dafiti/echo-middleware.LogrusWithConfig.func1.1(0xc9b8c0, 0xc00020a070, 0x3, 0xc0000380a4) /go/src/github.com/checkr/openmock/vendor/github.com/dafiti/echo-middleware/logrus.go:97 +0x119 github.com/labstack/echo.(*Echo).ServeHTTP(0xc000208000, 0xc84fc0, 0xc00024c000, 0xc000226300) /go/src/github.com/checkr/openmock/vendor/github.com/labstack/echo/echo.go:594 +0x227 net/http.serverHandler.ServeHTTP(0xc0001fc000, 0xc84fc0, 0xc00024c000, 0xc000226300) /usr/local/go/src/net/http/server.go:2774 +0xa8 net/http.(*conn).serve(0xc000224000, 0xc86e00, 0xc000076240) /usr/local/go/src/net/http/server.go:1878 +0x851 created by net/http.(*Server).Serve /usr/local/go/src/net/http/server.go:2884 +0x2f4

My template is as follows:
`
- key: test_kafka_1
kind: Behavior
expect:
http:
method: GET
path: /ping
kafka:
topic: hello_kafka_in
actions:
- publish_kafka:
topic: hello_kafka_out
payload: >
{
"kafka": "OK",
"data": {}

- key: test_kafka_2
kind: Behavior
expect:
http:
method: GET
path: /ping
kafka:
topic: hello_kafka_in
actions:
- publish_kafka:
topic: hello_kafka_out
payload: >
{
"kafka": "OK",
"data": {"base_tug":2.0,"avg_delta_tug":0.0,"ship_dim_pca_0":-0.021482626865567126,"ship_dim_pca_1":0.10497156370907207,"bs_ok":0,"hs_ok":0,"loc_score":0.002597402597402597,"ship_group":"Stukgoedschepen","wind_speed":4.0},
"nb_tug": 2.0
}`

Did I do any wrong here?