Hi guys! I continue trying to understand how CouchDB clusters work and trying to build a compelling administration tool that covers basic operations such as adding a node to the cluster, moving a shard from one node to another and so on. It is WIP but already open sourced here: https://github.com/cabify/couchdb-admin
Testing the scale out procedure (add node, make it replicate some shards, remove the shard from the previous location) I've seen the following error : [error] 2017-06-13T15:58:22.299140Z [email protected] <0.2214.3> -------- Error getting security objects for <<"testdb3">>: {error,no_majority} Not only mentioning my testdb3 but also with internal ones such as _global_changes. I mean, I was scaling out testdb3, but errors appeared referring to testdb3 and also _global_changes, but I wasn't scaling out _global_changes. The error appears when I configure a new node as being replica for an existing shard (by adding it to the by_nodes and by_ranges sections of document at _dbs/testdb3) The error appears every few seconds on the new replica logs once for each of the other replicas (3 for testdb3 and 2 for _global_changes at that time) and it also appears on the other nodes' logs but just once every few seconds. The error stops appearing once I remove the maintenance_mode flag on the new replica (because before configuring it as replica I enable that flag so the node doesn't participate in reads. Kudos Adam Kocoloski for your advice here) once pending_changes messages stop appearing on the new replica. I think the error is making the catch_up process not to work properly as my consistency checks fail when this error appears during the procedure (doesn't happen 100% of the times). I've seen it both happening when the new replica node was completely empty but also when it had the data preloaded (via rsync or because it had previously been a replica). I hope so many text helps you out :) Thanks! -- [image: Cabify - Your private Driver] <http://www.cabify.com/> *Carlos Alonso* Data Engineer Madrid, Spain [email protected] Prueba gratis con este código #CARLOSA6319 <https://cabify.com/i/carlosa6319> [image: Facebook] <http://cbify.com/fb_ES>[image: Twitter] <http://cbify.com/tw_ES>[image: Instagram] <http://cbify.com/in_ES>[image: Linkedin] <https://www.linkedin.com/in/mrcalonso> -- Este mensaje y cualquier archivo adjunto va dirigido exclusivamente a su destinatario, pudiendo contener información confidencial sometida a secreto profesional. No está permitida su reproducción o distribución sin la autorización expresa de Cabify. Si usted no es el destinatario final por favor elimínelo e infórmenos por esta vía. This message and any attached file are intended exclusively for the addressee, and it may be confidential. You are not allowed to copy or disclose it without Cabify's prior written authorization. If you are not the intended recipient please delete it from your system and notify us by e-mail.
