The Managed Metadata Service or Connection is currently not available. The Application Pool or Managed Metadata Web Service may not have been started. Please Contact your Administrator.

Hi,

I'm not able to access the term store. I get an below mentioned error.

"The Managed Metadata Service or Connection is currently not available. The Application Pool or Managed Metadata Web Service may not have been started. Please Contact your Administrator. "

Since this is happening on my local machine (Dev environment). I have full control on the term store and the all the site collections.
Hence, this is not a permission issue.

I have checked, the Metadata service is active on the machine. All the application pools in IIS is running.

After reading one of the recommendation on internet, I created a new Managed Metadata Service.
After which I was able access both (old and new) MMS from Central Admin only (highlight the MMS from manage service applications and click Manage ) and not from the site collection (term store management).

Now again its not working after I did an IISRESET.
The managed metadata service (Managed Metadata Service Connection) is grayed out.

ULS Error says:

Failed to create ManageLink for service proxy 'Managed Metadata Service'. Exception: System.TimeoutException: The request channel timed out attempting to send after 00:00:09.9999999. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout. ---> System.TimeoutException: The HTTP request to 'http://mitkar4:32843/7a91ec90b46843e995c144be48d804f0/MetadataWebService.svc' has exceeded the allotted timeout of 00:00:09.9990000. The time allotted to this operation may have been a portion of a longer timeout. ---> System.Net.WebException: The operation has timed out 

Please let me know if you need more information.