Re: [External] Re: [Hyperledger Fabric] Reverting from incorrect capability version

Eryargi, Hakan

Yup exactly that happened.


I made a config update for application capability for version V1_4_3, orderers accepted the block and peers crashed.


Below json path to be more precise:



Fabric binary version is 1.4.4 for both peers and orderers.



From: Yacov Manevich <YACOVM@...>
Sent: Monday, 24 February 2020 12:45
To: Eryargi, Hakan <hakan.eryargi@...>
Cc: fabric@...
Subject: [External] Re: [Hyperledger Fabric] Reverting from incorrect capability version


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Did you manage to reach a situation where the orderers accepted the block but the peers didn't? Were the orderers at a higher software version than the peers?

From:        "Eryargi, Hakan via Lists.Hyperledger.Org" <>
To:        "fabric@..." <fabric@...>
Cc:        fabric@...
Date:        02/24/2020 01:41 PM
Subject:        [EXTERNAL] [Hyperledger Fabric] Reverting from incorrect capability version
Sent by:        fabric@...

Is there a way of reverting from an incorrect capability version? (except restoring the whole Fabric network from a backup)
For example Application capability V1_4_3 does not exist, and when a config update is performed for that version, orderers accept the value but peers crash immediately when they receive the update block from orderer. Making another config update will not help in this case as peers crash immediately when they receive the first update.
If my understanding is correct, this is actually very dangerous behavior. The whole channel may render unusable.
Maybe orderers should not accept the value in the first place?


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