# Troubleshooting

Here are some common problems that you may run into when running a validator node.

# Validator has 0 voting power

Your validator has become auto-unbonded. In Soju and Columbus networks, we unbond validators if they do not vote on 50 of the last 100 blocks. Since blocks are proposed every ~2 seconds, a validator unresponsive for ~100 seconds will become unbonded. This usually happens when your terrad process crashes.

Here's how you can return the voting power back to your validator. First, if terrad is not running, start it up again:

terrad start

Wait for your full node to catch up to the latest block. Next, run the following command. Note that <terra> is the address of your validator account, and <name> is the name of the validator account. You can find this info by running terracli keys list.

terracli tx slashing unjail <terra> --chain-id=<chain_id> --from=<from>

WARNING

If you don't wait for terrad to sync before running unjail, you will receive an error message telling you your validator is still jailed.

Lastly, check your validator again to see if your voting power is back.

terracli status

You may notice that your voting power is less than it used to be. That's because you got slashed for downtime!

# terrad crashes from "too many open files"

The default number of files Linux can open (per-process) is 1024. terrad is known to open more than 1024 files. This causes the process to crash. A quick fix is to run ulimit -n 4096 (increase the number of open files allowed) and then restart the process with terrad start. If you are using systemd or another process manager to launch terrad this may require some configuration at that level. A sample systemd file to fix this issue is below:

# /etc/systemd/system/terrad.service
[Unit]
Description=Terra Columbus Node
After=network.target

[Service]
Type=simple
User=ubuntu
WorkingDirectory=/home/ubuntu
ExecStart=/home/ubuntu/go/bin/terrad start
Restart=on-failure
RestartSec=3
LimitNOFILE=4096

[Install]
WantedBy=multi-user.target