the word 'emfile' indicates the immediate problem is one of file permissions. 
The user that couchdb is running as is unable to open the shards/5... file. So 
you probably need a recursive chmod/chown session to fix up ownership and 
permissions.

Secondly, you have changed the names of 2 nodes. This is ... unwise. All 
clustered databases address their data files using the node names, so what 
you've effectively done is delete 2 of the 3 copies of your databases, which 
would explain the weird inconsistencies.

I wrote a stackoverflow post a while ago on how to correctly move an individual 
shard which explains some of the internals: 
https://stackoverflow.com/questions/6676972/moving-a-shard-from-one-bigcouch-server-to-another-for-balancing.

For your situation, I believe you will need to update all the documents in the 
_dbs database and substitute your old node names for the new node names. I 
strongly advise you take a backup of everything you can.

For others observing this thread, I strongly advise against renaming nodes like 
this, it can only lead to trouble, and potentially data loss.

B.

> On 16 Aug 2018, at 19:25, Arif Khan <[email protected]> wrote:
> 
> emfile

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