Newsfeed error

Question

been struggling with the dist. cache and appfabric - but all is up and running now
But still I don't see any newsfeed - when I try to add a status message from the Portal I get this: 
The operation failed because an internal error occurred. Internal type name: Microsoft.Office.Server.Microfeed.MicrofeedException. Internal error code 14
that's according to this
http://www.dotnetspark.com/kb/6127-internal-error-codes-sharepoint-2013-microfeed.aspx
Invalid_Content_Null_Or_Empty  
- but how do I resolve this error?  
- the UPSA - is this causing this error or?
The newsfeed isn't showing on the Mysite WebApplication as well...
In the event log I see 
The Execute method of job definition Microsoft.Office.Server.UserProfiles.LMTRepopulationJob (ID eeb8b69ff0426) threw an exception. More information is included below.
Unexpected exception in FeedCacheService.IsRepopulationNeeded: Cache cluster is down, restart the cache cluster and Retry.
but a Get-Cachehost says both is UP ?  and the caching services is running - so what's going on? 

Answer 1

The Execute method of job definition Microsoft.Office.Server.UserProfiles.LMTRepopulationJob (ID eeb8b69ff0426) threw an exception. More information is included below.
Unexpected exception in FeedCacheService.IsRepopulationNeeded: Cache cluster is down, restart the cache cluster and Retry.
Hi,
From the error message, I'd suggest you restart the app fabric service and test the issue again:
Restart-Service AppFabricCachingService
If the issue persists, please refer to the article below and reprovision the Distributed Cache Service using these steps:
1.Run the PowerShell command to stop Distributed Cache Service on all the SharePoint servers one by one.
Stop-SPDistributedCacheServiceInstance -Graceful
2.Remove the Distributed Cache Service instance from all the SharePoint  servers one by one.
Remove-SPDistributedCacheServiceInstance
3.Run the PSCONFIG wizard on all the SharePoint servers
4.Add the Distributed Cache Service instance back to the SharePoint servers
Add-SPDistributedCacheServiceInstance
http://blogs.technet.com/b/saantil/archive/2013/03/31/distributed-cache-in-sharepoint-2013-quot-unexpected-exception-in-feedcacheservice-isrepopulationneeded-cache-cluster-is-down-restart-the-cache-cluster-and-retry-quot.aspx
Regards,
Rebecca Tu
TechNet Community Support
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