[GitHub] [couchdb] nickva opened a new issue, #4168: Handle read-only remounts (erofs) disk errors better

[GitBox <gi...@apache.org>]

nickva opened a new issue, #4168:
URL: https://github.com/apache/couchdb/issues/4168

   On Linux when disks / filesystems fail they can be remounted as read-only. Disk writes through Erlang's file IO in that case returns an `{errors, erofs}` error. CouchDB doesn't handle a worker returning that error well, and returns 500 responses even if there is a quorum of other workers which are able to satisfy the request.
   
   In cases when quorum logic applies,  we should be able to tolerate a worker returning {erorr, erofs}` and perhaps treat it as a `rexi_EXIT maintenance_mode` error. 
   
   A few places to handle it:
     https://github.com/apache/couchdb/blob/main/src/fabric/src/fabric_doc_update.erl#L61-L114
     https://github.com/apache/couchdb/blob/main/src/fabric/src/fabric_rpc.erl#L155


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