Commenting the Optional section for tracking endpoints from the config file vanished the [WARN]. But I used to get another error. Here is the code below
# Optional section for tracking endpoints
# monitoring {
# snowplow {
# collector-uri: "127.0.0.1" #"169.254.169.254" #"{{collectorUri}}"
# collector-port: 8081
# app-id: "CFe23a" #{{enrichAppName}}"
# method: "GET"
# }
# }
Output from the console was
{"line":"125137401scala+stream+collector+akkaactordefault+dispatcher+2INFOakkaeventslf4jSlf4jLogger+Slf4jLoggerstarte","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.924Z"}
{"line":"125137422scala+stream+collector+akkaactordefault+dispatcher+2DEBUGakkaeventEventStream+loggerlog1+Slf4jLoggerstarted","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.937Z"}
{"line":"125137426scala+stream+collector+akkaactordefault+dispatcher+2DEBUGakkaeventEventStream+DefaultLoggersstarted","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.938Z"}
{"line":"125138158scala+stream+collector+akkaactordefault+dispatcher+3DEBUGspraycanserverHttpListener+Bindingto/1721601578080","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.939Z"}
{"line":"125138319scala+stream+collector+akkaactordefault+dispatcher+5DEBUGakkaioTcpListener+BindfailedforTCPchannelonendpoint/1721601578080javanetBindExceptionAddressalreadyinusQ==","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 2 bytes, but only got 1 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.939Z"}
{"line":"125138322scala+stream+collector+akkaactordefault+dispatcher+5WARNspraycanserverHttpListener+Bindto/1721601578080faileQ==","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 2 bytes, but only got 1 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.940Z"}
{"line":"125138333scala+stream+collector+akkaactordefault+dispatcher+5DEBUGakkaioTcpListener+ClosingserverSocketChannelafterbeingstoppec=","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.941Z"}
{"line":"125138339scala+stream+collector+akkaactordefault+dispatcher+4INFOakkaactorLocalActorRef+MessageakkadispatchsysmsgDeathWatchNotificationfromActorakka//scala+stream+collector/system/IO+TCP/selectors/a/01735555150toActorakka//scala+stream+collector/system/IO+TCP/selectors/a/01735555150wasnotdelivered1deadlettersencounteredThisloggingcanbeturnedofforadjustedwithconfigurationsettingsakkalog+dead+lettersandakkalog+dead+letters+during+shutdown","errors":[{"level":"error","message":"Error deserializing raw event: null"}],"failure_tstamp":"2017-07-24T07:21:48.941Z"}
{"line":"125138353ForkJoinPool+2+worker+5ERRORcsscscalastreamScalaCollector+Failurebindingtopors=","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 2 bytes, but only got 1 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.942Z"}
{"line":"javalangRuntimeExceptionCommandFailedBindActorakka//scala+stream+collector/user/handler+547286836/1721601578080100ListNonQ==","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 2 bytes, but only got 1 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.942Z"}
{"line":"atcomsnowplowanalyticssnowplowcollectorsscalastreamScalaCollectoranonfun3applyScalaCollectorAppscala118snowplow+stream+collector+090090=","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.943Z"}
{"line":"atcomsnowplowanalyticssnowplowcollectorsscalastreamScalaCollectoranonfun3applyScalaCollectorAppscala116snowplow+stream+collector+090090=","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.944Z"}
{"line":"atscalaconcurrentFutureanonfunflatMap1applyFuturescala251snowplow+stream+collector+09009","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.944Z"}
{"line":"atscalaconcurrentFutureanonfunflatMap1applyFuturescala249snowplow+stream+collector+09009","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.945Z"}
{"line":"atscalaconcurrentimplCallbackRunnablerunPromisescala32snowplow+stream+collector+09009w==","errors":[{"level":"error","message":"Error deserializing raw event: Cannot read. Remote side has closed. Tried to read 2 bytes, but only got 0 bytes. (This is often indicative of an internal error on the server side. Please check your server logs.)"}],"failure_tstamp":"2017-07-24T07:21:48.945Z"}
Please help me how to resolve the above issue. Sorry for the late reply in response