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Troubleshooting Rollapp

Welcome to the Troubleshooting section of Dymension Wiki 🛠

This documentation is dedicated to resolving common errors, bugs, and issues that arise when interacting with the Rollapp on Dymension. This resource is specifically designed to provide instant resolution to these common issues.

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To share your own troubleshooting solutions, simply click "Edit this page" below, add your solution using Markdown, and initiate a pull request for review.

Visit Introduction page for more information.

Error: [grpc]: tcp 0.0.0.0:9091: address already in use​

  • Error: 
Error: [grpc] failed to serve: listen tcp 0.0.0.0:9091: bind: address already in use
  • Solution: usually this means other node use 9091 port.

Check open ports:

sudo lsof -nP -iTCP -sTCP:LISTEN

If the ports are occupied by another node, reinstall the rollapp on the new server with default ports.

Or all the ports the rollapp is using are configurable on this server. The available keys are: rollapp-rpc-port, lc-gateway-port, lc-rpc-port, rollapp-jsonrpc-port, rollapp-ws-port and rollapp-grpc-port.

roller config set rollapp-rpc-port 6969

Firewall status is inactive​

  • Problem:

On a server with a working rollapp, you need to configure a firewall and open ports 26657, 8545, 1317 (by default).

Check firewall status:

sudo ufw status

If we get inactive, we solve it below.

  • Solution:

To allow opening a connection on port 26657:

sudo ufw allow 26657

Reload the firewall service:

sudo ufw reload

Check the status of the firewall:

sudo ufw status

Similar to other ports:

sudo ufw allow 8545
sudo ufw allow 1317

Cannot connect via SSH after configured firewall​

  • Problem:

After opening ports and configuring the firewall, I cannot connect to the server via SSH.

  • Solution:

Verify OpenSSH installation on your system:

sudo apt list --installed | grep openssh-server

You can skip this step if the OpenSSH server is installed on your system:

sudo apt-get update
sudo apt install openssh-server

Check the ssh service status:

sudo service ssh status

If it is not active, you can start it by running the following command:

sudo service ssh start

To enable the service on system start, you can run the following command:

sudo service enable ssh

It is likely that the server is listening on a different port than the default port 22.

Check which port the OpenSSH server is listening to:

sudo netstat -ltnp | grep sshd

To allow opening a connection on port 22:

sudo ufw allow 22

Reload the firewall service:

sudo ufw reload

Check the status of the firewall:

sudo ufw status

WebSocket connection closed​

  • Error: logs rollapp have error 
WebSocket connection closed

  • Solution:

    • There is an issue with your sequencer.
    • It is necessary to forcefully stop and restart the sequencer.
    • If you do this through the screen, stop all processes.

Relayer status -> creating channel​

  • Error: status relayer is creating channel and logs rollapp have error 
Error sending messages
  • Solution:

You can wait. Or search for overide for some context

Node: store is not initialized​

  • Error: after migrate rollapp
Node: store is not initialized
  • Solution:

You can't migrate with resync.

Failed to query node status​

  • Error: you have error on relayer logs
Failed to query node status
  • Solution:

You can wait. Or try to change rpc.

Change RPC​

nano $HOME/.roller/config.toml
  • API_URL = "https://dymension-api.f5nodes.com"
  • RPC_URL = "https://dymension-rpc.f5nodes.com"
nano $HOME/.roller/relayer/config/config.yaml
  • rpc-addr: https://dymension-rpc.f5nodes.com
nano $HOME/.roller/rollapp/config/dymint.toml
  • node_address = "https://dymension-rpc.f5nodes.com"

Unknown data layer type​

  • Error: after roller run
Unknown data layer type
  • Solution:

Try add archive node to config:

nano $HOME/.roller/relayer/config/config.yaml
  • ARCHIVE_RPC_URL = "https://rpc-dymension-testnet.mzonder.com:443"

Failed to listen on debug address​

  • Error: you have this on rollapp logs
Failed to listen on debug address

  • Solution:

    • You probably run 2 instances of the rollapp.
    • Choose between screen and systemd.
    • Stop one of them.
    • For inexperienced users, it is better to use systemd.

Deleting empty file​

  • Error: rollapp logs get stuck and you have an messages:
INFO: Deleting empty file: /root/.roller/rollapp/data/dymint/004007.vlog
  • Solution:

Try restart this.

If you use screen. Stop with CTRL+C and start again.

If you use systemd:

sudo systemctl restart da-light-client
sudo systemctl restart sequencer
sudo systemctl restart relayer

RPC client connection failed​

  • Error: you see error on portal after connection to rollapp:
RPC client connection failed, please try again later
  • Solution:

It looks like your IP is not responding

Check status node:

curl localhost:26657/status

If you have output {"jsonrpc":"2.0","result":{"node_info":{"protocol_version":{"p2p":"8","block":"11","app":"0"},"id then all good.

Next step is check firewall

If you have output curl: (7) Failed to connect to localhost port ...: Connection refused then restart your da-light client.

Failed to initialize database​

  • Error: you can error on rollapp logs
Error: failed to initialize database: resource temporarily unavailable

  • Solution:

    • You probably run 2 instances of the rollapp.
    • Choose between screen and systemd.
    • Stop one of them.
    • For inexperienced users, it is better to use systemd.

Availability validation failed​

  • Error: 
ERROR   share/light     light/availability.go:88        availability validation failed  {"root": "xxxxxxxxxxxxx", "err": "context deadline exceeded"}
  • Solution:

Try restart your da-light client.

If you use screen. Stop with CTRL+C and start again.

If you use systemd:

sudo systemctl restart da-light-client
sudo systemctl restart sequencer
sudo systemctl restart relayer

Node is unhealthy: insufficient funds​

  • Error: 
ERROR   share/light     light/availability.go:88        availability validation failed  {"root": "xxxxxxxxxxxxx", "err": "context deadline exceeded"}
  • Solution:

You need to request more tokens on your key da-light client.

This can be TIA or AVL, depending on your environment.

Flush not complete​

  • Error: you have error on rolayer logs
warn    Flush not complete     "error": "failed to enqueue pending messages for flush: no ibc messages found
  • Solution:

Flush not complete error can be ignored if your rollapp is fully functional.

If no try to restart services.