WSO2 Analytics: No StreamDefinition for streamId loganalyzer:1.0.0 present in cache

Question

I am using WSO2 APIM 2.5.0 and Analytics 2.1.1.SNAPSHOT along with it. Everything was working fine as I have been using it for some days now.

Suddenly, I have started getting error as below:

  Caused by: org.wso2.carbon.databridge.core.exception.EventConversionException: No StreamDefinition for streamId loganalyzer:1.0.0 present in cache
at 

 org.wso2.carbon.databridge.receiver.thrift.converter.
ThriftEventConverter.createEventList(ThriftEventConverter.java:166)

Then, to analyse it, I restarted the Analytics application and then I found this in the startup

INFO {org.wso2.carbon.application.deployer.internal.ApplicationManager} -  
Deploying Carbon Application : org_wso2_carbon_analytics_apim-
1.0.0.car...
WARN {org.wso2.carbon.application.deployer.internal.ApplicationManager} -  
No artifacts found to be deployed in this server. Ignoring Carbon 
Application : org_wso2_carbon_analytics_apim-1.0.0.car

There were no changes in the carbon apps from both the applications (apim and analytics)

Can some one please let me know why this error started coming and how to resolve this.

Thanks

Answer 1

This may be due to the server roles of analytics serve not matching with the server roles defined in artifact.xml file for each stream. If the roles "DataAnalyticsServer" and "ComplexEventProcessor" doesn't exist as server roles, the analytics artifacts won't be deployed.

To check whether the server roles are there;

1. Login to the APIM analytics server Management Console.

2. Please add the below 2 server roles from Configure > Server Roles > Add New Server Role (if it's not already there).

   DataAnalyticsServer 
   ComplexEventProcessor
   

3. Remove the current ANALYTICS_HOME/tmp folder in the analytics servers. Redeploy the capp

Also check whether the ServerRoles property in ANALYTICS_HOME/repository/conf/carbon.xml contains an entry as shown below. For capps deployment, it identifies the roles that can be acted by the current server.

   <ServerRoles>
        <Role>DataAnalyticsServer</Role>
        <Role>ComplexEventProcessor</Role>
    </ServerRoles>

Is there any reason as to why you are using Analytics 2.1.1 with WSO2 APIM 2.5.0? The recommended approach is to to use Analytics 2.5 with APIM 2.5.0.