{"action":"created","issue":{"url":"https://api.github.com/repos/zcash/zcash/issues/1652","repository_url":"https://api.github.com/repos/zcash/zcash","labels_url":"https://api.github.com/repos/zcash/zcash/issues/1652/labels{/name}","comments_url":"https://api.github.com/repos/zcash/zcash/issues/1652/comments","events_url":"https://api.github.com/repos/zcash/zcash/issues/1652/events","html_url":"https://github.com/zcash/zcash/issues/1652","id":185473049,"number":1652,"title":"> 50% block rejections on RC2 testnet","user":{"login":"timolson","id":1697115,"avatar_url":"https://avatars.githubusercontent.com/u/1697115?v=3","gravatar_id":"","url":"https://api.github.com/users/timolson","html_url":"https://github.com/timolson","followers_url":"https://api.github.com/users/timolson/followers","following_url":"https://api.github.com/users/timolson/following{/other_user}","gists_url":"https://api.github.com/users/timolson/gists{/gist_id}","starred_url":"https://api.github.com/users/timolson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/timolson/subscriptions","organizations_url":"https://api.github.com/users/timolson/orgs","repos_url":"https://api.github.com/users/timolson/repos","events_url":"https://api.github.com/users/timolson/events{/privacy}","received_events_url":"https://api.github.com/users/timolson/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/zcash/zcash/labels/needs%20prioritization","name":"needs prioritization","color":"d8ff04"},{"url":"https://api.github.com/repos/zcash/zcash/labels/PoW%20and%20mining","name":"PoW and mining","color":"903b00"}],"state":"open","locked":false,"assignee":{"login":"str4d","id":4993799,"avatar_url":"https://avatars.githubusercontent.com/u/4993799?v=3","gravatar_id":"","url":"https://api.github.com/users/str4d","html_url":"https://github.com/str4d","followers_url":"https://api.github.com/users/str4d/followers","following_url":"https://api.github.com/users/str4d/following{/other_user}","gists_url":"https://api.github.com/users/str4d/gists{/gist_id}","starred_url":"https://api.github.com/users/str4d/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/str4d/subscriptions","organizations_url":"https://api.github.com/users/str4d/orgs","repos_url":"https://api.github.com/users/str4d/repos","events_url":"https://api.github.com/users/str4d/events{/privacy}","received_events_url":"https://api.github.com/users/str4d/received_events","type":"User","site_admin":false},"assignees":[{"login":"str4d","id":4993799,"avatar_url":"https://avatars.githubusercontent.com/u/4993799?v=3","gravatar_id":"","url":"https://api.github.com/users/str4d","html_url":"https://github.com/str4d","followers_url":"https://api.github.com/users/str4d/followers","following_url":"https://api.github.com/users/str4d/following{/other_user}","gists_url":"https://api.github.com/users/str4d/gists{/gist_id}","starred_url":"https://api.github.com/users/str4d/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/str4d/subscriptions","organizations_url":"https://api.github.com/users/str4d/orgs","repos_url":"https://api.github.com/users/str4d/repos","events_url":"https://api.github.com/users/str4d/events{/privacy}","received_events_url":"https://api.github.com/users/str4d/received_events","type":"User","site_admin":false}],"milestone":null,"comments":2,"created_at":"2016-10-26T18:29:00Z","updated_at":"2016-10-27T12:07:45Z","closed_at":null,"body":"We are getting more than 50% of our blocks on RC2 testnet rejected.  If we point to RC1 then everything looks good.\r\n\r\nThe response from `submitblock` is `{\"result\":\"inconclusive\",\"error\":null,\"id\":1}`.  We have verified that we are using the correct `previousblockhash` and there is a time gap between when we submit and when the next \"real\" block is found, so I do not think it's a problem with stales.\r\n\r\nWe do use `getblocktemplate` with `coinbasevalue` and `getblocksubsidy`, so there are some related PR's and issues:\r\nhttps://github.com/zcash/zcash/pull/1602\r\nhttps://github.com/zcash/zcash/issues/1424\r\n\r\nHere's an example `submitblock` which resulted in an `inconclusive` response and which was rejected by the network: http://pastebin.com/FSe2AkTa\r\n\r\nWe have enabled more debugging on zcashd to try to track this down.  We are also trying to set up a private RC2 testnet to debug."},"comment":{"url":"https://api.github.com/repos/zcash/zcash/issues/comments/256623018","html_url":"https://github.com/zcash/zcash/issues/1652#issuecomment-256623018","issue_url":"https://api.github.com/repos/zcash/zcash/issues/1652","id":256623018,"user":{"login":"timolson","id":1697115,"avatar_url":"https://avatars.githubusercontent.com/u/1697115?v=3","gravatar_id":"","url":"https://api.github.com/users/timolson","html_url":"https://github.com/timolson","followers_url":"https://api.github.com/users/timolson/followers","following_url":"https://api.github.com/users/timolson/following{/other_user}","gists_url":"https://api.github.com/users/timolson/gists{/gist_id}","starred_url":"https://api.github.com/users/timolson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/timolson/subscriptions","organizations_url":"https://api.github.com/users/timolson/orgs","repos_url":"https://api.github.com/users/timolson/repos","events_url":"https://api.github.com/users/timolson/events{/privacy}","received_events_url":"https://api.github.com/users/timolson/received_events","type":"User","site_admin":false},"created_at":"2016-10-27T12:07:45Z","updated_at":"2016-10-27T12:07:45Z","body":"We ran against public testnet last night.  We submitted a block which zcashd reported as \"inconclusive\", then zcashd no longer updated the blockheight (at least via GBT) and kept reporting block 2680 from GBT, causing our miner to mine stale blocks from then onwards.  Here is a log of our communication with zcashd: http://pastebin.com/D5W6n0JJ\r\nI'll get our log from zcashd as soon as Salt is awake…"}}
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