[Backlogmanager] [FIWARE-JIRA] (HELP-16140) [fiware-stackoverflow] Cygnus doesn' t persist data because: " namespace name generated is too long > 127"

[Fernando Lopez (JIRA)]

     [ https://jira.fiware.org/browse/HELP-16140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fernando Lopez reassigned HELP-16140:
-------------------------------------

    Assignee: José Ignacio Carretero Guarde

> [fiware-stackoverflow] Cygnus doesn't persist data because: "namespace name generated is too long >127"
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HELP-16140
>                 URL: https://jira.fiware.org/browse/HELP-16140
>             Project: Help-Desk
>          Issue Type: Monitor
>          Components: FIWARE-TECH-HELP
>            Reporter: Backlog Manager
>            Assignee: José Ignacio Carretero Guarde
>              Labels: fiware, fiware-cygnus
>
> Created question in FIWARE Q/A platform on 09-09-2019 at 23:09
> {color: red}Please, ANSWER this question AT{color} https://stackoverflow.com/questions/57861531/cygnus-doesnt-persist-data-because-namespace-name-generated-is-too-long-127
> +Question:+
> Cygnus doesn't persist data because: "namespace name generated is too long >127"
> +Description:+
> After some days breaking my head because cygnus persist randomly the updates, I have found in the logs that the size of a generated name space is too long.
> I'm working on Centos 7
> my entities use the standard type: BikeHireDockingStation
> The error says that the namespace generate is too long (127 caracteres). It generates 167:
> sth_malaga.sth_/_urn:ngsi-ld:BikeHireDockingStation:10_BikeHireDockingStation.aggr.$_id.entityId_1__id.entityType_1__id.attrName_1__id.resolution_1__id.origin_1
> but even if I change the type to bike, the size is 124.
> here you can see the part of the log error that I obtain when I call:
> $ docker container logs fiware-cygnus
> time=2019-09-09T21:14:14.176Z | lvl=ERROR | corr=N/A | trans=N/A | srv=N/A | 
> subsrv=N/A | comp=cygnus-ngsi | op=processRollbackedBatches | 
> msg=com.telefonica.iot.cygnus.sinks.NGSISink[399] : CygnusPersistenceError. -, 
> Command failed with error 67: 'namespace name generated from index name 
> "sth_malaga.sth_/_urn:ngsi-ld:BikeHireDockingStation:10_BikeHireDockingStation.aggr.$_id.entityId_1__id.entityType_1__id.attrName_1__id.resolution_1__id.origin_1"
>  is too long (127 byte max)' on server mongo-db:27017. 
> The full response is { "ok" : 0.0, "errmsg" : "namespace name generated from index name 
> \"sth_malaga.sth_/_urn:ngsi-ld:BikeHireDockingStation:10_BikeHireDockingStation.aggr.$_id.entityId_1__id.entityType_1__id.attrName_1__id.resolution_1__id.origin_1\" 
> is too long (127 byte max)", "code" : 67, "codeName" : "CannotCreateIndex" }.
>  Stack trace: 
> [com.telefonica.iot.cygnus.sinks.NGSISTHSink$STHAggregator.persist(NGSISTHSink.java:374), 
> com.telefonica.iot.cygnus.sinks.NGSISTHSink.persistBatch(NGSISTHSink.java:108), 
> com.telefonica.iot.cygnus.sinks.NGSISink.processRollbackedBatches(NGSISink.java:391), 
> com.telefonica.iot.cygnus.sinks.NGSISink.process(NGSISink.java:373), 
> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:67), 
> org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:145), java.lang.Thread.run(Thread.java:748)]
> Is it possible that the maximum size for a type is 5? (with 5 the size of the namespace is 126)
> Can you help me to solve this problem?



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