Created question in FIWARE Q/A platform on 21-07-2015 at 15:07
Please, ANSWER this question AT https://stackoverflow.com/questions/31540631/fiware-cygnus-no-data-have-been-persisted-in-mongo-db

Question:
Fiware cygnus: no data have been persisted in mongo DB

Description:
I am trying to use cygnus with Mongo DB, but no data have been persisted in the data base.
Here is the notification got in cygnus:

15/07/21 14:48:01 INFO handlers.OrionRestHandler: Starting transaction (1437482681-118-0000000000)
15/07/21 14:48:01 INFO handlers.OrionRestHandler: Received data ({ "subscriptionId" : "55a73819d0c457bb20b1d467", "originator" : "localhost", "contextResponses" : [ { "contextElement" : { "type" : "enocean", "isPattern" : "false", "id" : "enocean:myButtonA", "attributes" : [ { "name" : "ButtonValue", "type" : "", "value" : "ON", "metadatas" : [

] } ] }, "statusCode" :

} ]})
15/07/21 14:48:01 INFO handlers.OrionRestHandler: Event put in the channel (id=1454120446, ttl=10)

Here is my agent configuration:

cygnusagent.sources = http-source
cygnusagent.sinks = OrionMongoSink
cygnusagent.channels = mongo-channel

#=============================================

1. source configuration
2. channel name where to write the notification events
   cygnusagent.sources.http-source.channels = mongo-channel
3. source class, must not be changed
   cygnusagent.sources.http-source.type = org.apache.flume.source.http.HTTPSource
4. listening port the Flume source will use for receiving incoming notifications
   cygnusagent.sources.http-source.port = 5050
5. Flume handler that will parse the notifications, must not be changed
   cygnusagent.sources.http-source.handler = com.telefonica.iot.cygnus.handlers.OrionRestHandler
6. URL target
   cygnusagent.sources.http-source.handler.notification_target = /notify
7. Default service (service semantic depends on the persistence sink)
   cygnusagent.sources.http-source.handler.default_service = def_serv
8. Default service path (service path semantic depends on the persistence sink)
   cygnusagent.sources.http-source.handler.default_service_path = def_servpath
9. Number of channel re-injection retries before a Flume event is definitely discarded (-1 means infinite retries)
   cygnusagent.sources.http-source.handler.events_ttl = 10
10. Source interceptors, do not change
    cygnusagent.sources.http-source.interceptors = ts gi
11. TimestampInterceptor, do not change
    cygnusagent.sources.http-source.interceptors.ts.type = timestamp
12. GroupinInterceptor, do not change
    cygnusagent.sources.http-source.interceptors.gi.type = com.telefonica.iot.cygnus.interceptors.GroupingInterceptor$Builder
13. Grouping rules for the GroupingInterceptor, put the right absolute path to the file if necessary
14. See the doc/design/interceptors document for more details
    cygnusagent.sources.http-source.interceptors.gi.grouping_rules_conf_file = /home/egm_demo/usr/fiware-cygnus/conf/grouping_rules.conf

1. ============================================
2. OrionMongoSink configuration
3. sink class, must not be changed
   cygnusagent.sinks.mongo-sink.type = com.telefonica.iot.cygnus.sinks.OrionMongoSink
4. channel name from where to read notification events
   cygnusagent.sinks.mongo-sink.channel = mongo-channel
5. FQDN/IP:port where the MongoDB server runs (standalone case) or comma-separated list of FQDN/IP:port pairs where the MongoDB replica set members run
   cygnusagent.sinks.mongo-sink.mongo_hosts = 127.0.0.1:27017
6. a valid user in the MongoDB server (or empty if authentication is not enabled in MongoDB)
   cygnusagent.sinks.mongo-sink.mongo_username =
7. password for the user above (or empty if authentication is not enabled in MongoDB)
   cygnusagent.sinks.mongo-sink.mongo_password =
8. prefix for the MongoDB databases
   #cygnusagent.sinks.mongo-sink.db_prefix = kura
9. prefix pro the MongoDB collections
   #cygnusagent.sinks.mongo-sink.collection_prefix = button
10. true is collection names are based on a hash, false for human redable collections
    cygnusagent.sinks.mongo-sink.should_hash = false

1. ============================================
2. mongo-channel configuration
3. channel type (must not be changed)
   cygnusagent.channels.mongo-channel.type = memory
4. capacity of the channel
   cygnusagent.channels.mongo-channel.capacity = 1000
5. amount of bytes that can be sent per transaction
   cygnusagent.channels.mongo-channel.transactionCapacity = 100

Here is my rule :

{
"grouping_rules": [

]
}

Any ideas of what I have missed? Thanks in advance for your help!