node stalled

[NanuIjaz]

Hi team,

I saw this in node logs, can you please take a look and suggest what could be the problem?

cardano-node-ogmios investigation.log

[carbolymer]

What's the node version? Is this reproducible - if yes, how?

[CarlosLopezDeLara]

Is this on a testnet?

[NanuIjaz]

@CarlosLopezDeLara Hi Carlos, yes testnet.

[NanuIjaz]

@carbolymer 10.1.4 , testnet.

[NanuIjaz]

we upgraded the node version to 10.5.3 , and see this

[cardano-:cardano.node.PeerSelection:Notice:363] [2025-11-25 07:31:26.86 UTC] TraceChurnTimeout 500.406715567s IncreasedEstablishedBigLedgerPeers 0
[cardano-:cardano.node.PeerSelection:Notice:361] [2025-11-25 07:31:26.86 UTC] TraceTargetsChanged (PeerSelectionTargets {targetNumberOfRootPeers = 60, targetNumberOfKnownPeers = 150, targetNumberOfEstablishedPeers = 3, targetNumberOfActivePeers = 2, targetNumberOfKnownBigLedgerPeers = 15, targetNumberOfEstablishedBigLedgerPeers = 10, targetNumberOfActiveBigLedgerPeers = 1}) (PeerSelectionTargets {targetNumberOfRootPeers = 60, targetNumberOfKnownPeers = 150, targetNumberOfEstablishedPeers = 3, targetNumberOfActivePeers = 1, targetNumberOfKnownBigLedgerPeers = 15, targetNumberOfEstablishedBigLedgerPeers = 10, targetNumberOfActiveBigLedgerPeers = 1})
[cardano-:cardano.node.InboundGovernor:Info:355] [2025-11-25 07:31:26.86 UTC] TrInboundGovernorCounters (Counters {coldPeersRemote = 0, idlePeersRemote = 1, warmPeersRemote = 0, hotPeersRemote = 0})
[cardano-:cardano.node.PublicRootPeers:Info:100684] [2025-11-25 07:31:26.86 UTC] TracePublicRootFailure "preprod-node.play.dev.cardano.org" TimeoutExpired

[VSGic]

Yes, we have the same issue on preview testnet, upgraded to 10.5.3, node still is stuck.

[liv-io]

In Preview I was able to recover the nodes by changing these two options:

config.json

-  "ConsensusMode": "GenesisMode",
+  "ConsensusMode": "PraosMode",

topology.json

-  "peerSnapshotFile": "cardano-node/peer-snapshot.json",

• Restart cardano-node
• Wait until it is synced 100% cardano-cli query tip --testnet-magic 2 | jq -r .syncProgress
• Revert the config changes above
• Restart cardano-node

Hope this helps.

[VSGic]

@liv-io thanks, looks good now

[NanuIjaz]

Will this work for mainnet as well? @liv-io

[liv-io]

@NanuIjaz Yes, I believe it should work. Edit: mainnet is still in PraosMode anyway:
https://github.com/cardano-foundation/cardano-configurations/blob/main/network/mainnet/cardano-node/config.json#L8

Make sure to have the bootstrap nodes configured in your topology.json:
https://github.com/cardano-foundation/cardano-configurations/blob/main/network/mainnet/cardano-node/topology.json#L2