Sending a transaction to a cluster with 3 peers
up vote
2
down vote
favorite
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
add a comment |
up vote
2
down vote
favorite
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
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 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 withsendTransactionProposal
as endorsing peers. Does it make sense?
– Nav
Nov 20 at 1:04
add a comment |
up vote
2
down vote
favorite
up vote
2
down vote
favorite
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
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
edited Nov 21 at 14:46
asked Nov 19 at 15:34
Nav
113314
113314
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 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 withsendTransactionProposal
as endorsing peers. Does it make sense?
– Nav
Nov 20 at 1:04
add a comment |
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 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 withsendTransactionProposal
as endorsing peers. Does it make sense?
– Nav
Nov 20 at 1:04
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 at 21:43
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 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 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 at 1:04
add a comment |
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53377947%2fsending-a-transaction-to-a-cluster-with-3-peers%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
What is the chaincode endorsement policy? Does it need endorsement from all 3 peers?
– adnan.c
Nov 19 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 withsendTransactionProposal
as endorsing peers. Does it make sense?– Nav
Nov 20 at 1:04