Mixing
Sending a transaction to a cluster with 3 peers
I'm trying to extend my existing single orderer, single peer hyperledger fabric system to 2 orders and 3 peers. I've managed to add a new order so that the system works even if one of the orderers is down.
Now I'm trying to do the same with peers but I'm having difficulties to save a new record on the blockchain, when one of the peers is down.
On saving, I'm using Java SDK to send transaction proposal to all three peers - I receive 2 successful and one failing ProposalResponse - I'm filtering out the failed on and send the collection of successful ones to org.hyperledger.fabric.sdk.Channel#sendTransaction(java.util.Collection<org.hyperledger.fabric.sdk.ProposalResponse>).
The method returns CompletableFuture<TransactionEvent> which I'm subscribing to with whenComplete. I've noticed that when one of the peers is down the future doesn't complete unless the offline peer becomes available again.
Is it how the system is designed? I'd expect fabric and SDK complete a task even if only one peer is available and then let peers update themselves when they become online. Is there some way to achieve a behaviour like that?
Thanks in advance!
EDIT:
I've realized that I'm using sendTransaction with default transaction options that add all peers as event peers so the transaction cannot be finished unless all of them receive the event.
java hyperledger-fabric hyperledger
asked Nov 19 '18 at 15:34
Nav
113314
add a comment |
I'm trying to extend my existing single orderer, single peer hyperledger fabric system to 2 orders and 3 peers. I've managed to add a new order so that the system works even if one of the orderers is down.
Now I'm trying to do the same with peers but I'm having difficulties to save a new record on the blockchain, when one of the peers is down.
On saving, I'm using Java SDK to send transaction proposal to all three peers - I receive 2 successful and one failing ProposalResponse - I'm filtering out the failed on and send the collection of successful ones to org.hyperledger.fabric.sdk.Channel#sendTransaction(java.util.Collection<org.hyperledger.fabric.sdk.ProposalResponse>).
The method returns CompletableFuture<TransactionEvent> which I'm subscribing to with whenComplete. I've noticed that when one of the peers is down the future doesn't complete unless the offline peer becomes available again.
Is it how the system is designed? I'd expect fabric and SDK complete a task even if only one peer is available and then let peers update themselves when they become online. Is there some way to achieve a behaviour like that?
Thanks in advance!
EDIT:
I've realized that I'm using sendTransaction with default transaction options that add all peers as event peers so the transaction cannot be finished unless all of them receive the event.
java hyperledger-fabric hyperledger
asked Nov 19 '18 at 15:34
Nav
113314
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 '18 at 21:43
@adnan.c Tbh I just started working with fabric and completely forgot to look into it - I believe we have some basic policy taken based probably from some tutorial. As 3 peers are there for resilience I'd assume that it shouldn't really need all 3 peers for endorsement - just one would be enough. Is there a way to configure it this way? Right now I have two approaches - passingNOfEvents.createNoEvents()to ` sendTransaction(Collection<ProposalResponse>,TransactionOptions)` or using all successful peers returned withsendTransactionProposalas endorsing peers. Does it make sense?
– Nav
Nov 20 '18 at 1:04
add a comment |
I'm trying to extend my existing single orderer, single peer hyperledger fabric system to 2 orders and 3 peers. I've managed to add a new order so that the system works even if one of the orderers is down.
Now I'm trying to do the same with peers but I'm having difficulties to save a new record on the blockchain, when one of the peers is down.
On saving, I'm using Java SDK to send transaction proposal to all three peers - I receive 2 successful and one failing ProposalResponse - I'm filtering out the failed on and send the collection of successful ones to org.hyperledger.fabric.sdk.Channel#sendTransaction(java.util.Collection<org.hyperledger.fabric.sdk.ProposalResponse>).
The method returns CompletableFuture<TransactionEvent> which I'm subscribing to with whenComplete. I've noticed that when one of the peers is down the future doesn't complete unless the offline peer becomes available again.
Is it how the system is designed? I'd expect fabric and SDK complete a task even if only one peer is available and then let peers update themselves when they become online. Is there some way to achieve a behaviour like that?
Thanks in advance!
EDIT:
I've realized that I'm using sendTransaction with default transaction options that add all peers as event peers so the transaction cannot be finished unless all of them receive the event.
java hyperledger-fabric hyperledger
asked Nov 19 '18 at 15:34
Nav
113314
I'm trying to extend my existing single orderer, single peer hyperledger fabric system to 2 orders and 3 peers. I've managed to add a new order so that the system works even if one of the orderers is down.
Now I'm trying to do the same with peers but I'm having difficulties to save a new record on the blockchain, when one of the peers is down.
On saving, I'm using Java SDK to send transaction proposal to all three peers - I receive 2 successful and one failing ProposalResponse - I'm filtering out the failed on and send the collection of successful ones to org.hyperledger.fabric.sdk.Channel#sendTransaction(java.util.Collection<org.hyperledger.fabric.sdk.ProposalResponse>).
The method returns CompletableFuture<TransactionEvent> which I'm subscribing to with whenComplete. I've noticed that when one of the peers is down the future doesn't complete unless the offline peer becomes available again.
Is it how the system is designed? I'd expect fabric and SDK complete a task even if only one peer is available and then let peers update themselves when they become online. Is there some way to achieve a behaviour like that?
Thanks in advance!
EDIT:
I've realized that I'm using sendTransaction with default transaction options that add all peers as event peers so the transaction cannot be finished unless all of them receive the event.
java hyperledger-fabric hyperledger
java hyperledger-fabric hyperledger
asked Nov 19 '18 at 15:34
Nav
113314
asked Nov 19 '18 at 15:34
Nav
113314
edited Nov 21 '18 at 14:46
asked Nov 19 '18 at 15:34
Nav
113314
asked Nov 19 '18 at 15:34
Nav
113314
asked Nov 19 '18 at 15:34
Nav
113314
113314
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 '18 at 21:43
@adnan.c Tbh I just started working with fabric and completely forgot to look into it - I believe we have some basic policy taken based probably from some tutorial. As 3 peers are there for resilience I'd assume that it shouldn't really need all 3 peers for endorsement - just one would be enough. Is there a way to configure it this way? Right now I have two approaches - passingNOfEvents.createNoEvents()to ` sendTransaction(Collection<ProposalResponse>,TransactionOptions)` or using all successful peers returned withsendTransactionProposalas endorsing peers. Does it make sense?
– Nav
Nov 20 '18 at 1:04
add a comment |
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 '18 at 21:43
@adnan.c Tbh I just started working with fabric and completely forgot to look into it - I believe we have some basic policy taken based probably from some tutorial. As 3 peers are there for resilience I'd assume that it shouldn't really need all 3 peers for endorsement - just one would be enough. Is there a way to configure it this way? Right now I have two approaches - passingNOfEvents.createNoEvents()to ` sendTransaction(Collection<ProposalResponse>,TransactionOptions)` or using all successful peers returned withsendTransactionProposalas endorsing peers. Does it make sense?
– Nav
Nov 20 '18 at 1:04
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 '18 at 21:43
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 '18 at 21:43
@adnan.c Tbh I just started working with fabric and completely forgot to look into it - I believe we have some basic policy taken based probably from some tutorial. As 3 peers are there for resilience I'd assume that it shouldn't really need all 3 peers for endorsement - just one would be enough. Is there a way to configure it this way? Right now I have two approaches - passing
NOfEvents.createNoEvents() to ` sendTransaction(Collection<ProposalResponse>,TransactionOptions)` or using all successful peers returned with sendTransactionProposal as endorsing peers. Does it make sense?– Nav
Nov 20 '18 at 1:04
@adnan.c Tbh I just started working with fabric and completely forgot to look into it - I believe we have some basic policy taken based probably from some tutorial. As 3 peers are there for resilience I'd assume that it shouldn't really need all 3 peers for endorsement - just one would be enough. Is there a way to configure it this way? Right now I have two approaches - passing
NOfEvents.createNoEvents() to ` sendTransaction(Collection<ProposalResponse>,TransactionOptions)` or using all successful peers returned with sendTransactionProposal as endorsing peers. Does it make sense?– Nav
Nov 20 '18 at 1:04
add a comment |
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What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 '18 at 21:43
@adnan.c Tbh I just started working with fabric and completely forgot to look into it - I believe we have some basic policy taken based probably from some tutorial. As 3 peers are there for resilience I'd assume that it shouldn't really need all 3 peers for endorsement - just one would be enough. Is there a way to configure it this way? Right now I have two approaches - passing
NOfEvents.createNoEvents()to ` sendTransaction(Collection<ProposalResponse>,TransactionOptions)` or using all successful peers returned withsendTransactionProposalas endorsing peers. Does it make sense?– Nav
Nov 20 '18 at 1:04