jm + postmortems + split-brain   1

Stellar/Ripple suffer a failure of their consensus system, resulting in a split-brain failure
Prof. Mazières’s research indicated some risk that consensus could fail, though we were nor certain if the required circumstances for such a failure were realistic. This week, we discovered the first instance of a consensus failure. On Tuesday night, the nodes on the network began to disagree and caused a fork of the ledger. The majority of the network was on ledger chain A. At some point, the network decided to switch to ledger chain B. This caused the roll back of a few hours of transactions that had only been recorded on chain A. We were able to replay most of these rolled back transactions on chain B to minimize the impact. However, in cases where an account had already sent a transaction on chain B the replay wasn’t possible.
consensus  distcomp  stellar  ripple  split-brain  postmortems  outages  ledger-fork  payment 
december 2014 by jm

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