Error Handling inside Internet Computer

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SubnetOverSubscribed: StatusCode 101

This error is raised when installing a new canister or increasing memory allocation in the canister, and no compute allocation or memory capacity is left in the subnet.

MaxNumberOfCanistersReached: StatusCode 102

There is an option in the NNS registry to set a max limit on the number of canisters in a subnet. When a new canister is created, the subnet checks if this maximum limit is reached and throws an error accordingly. Currently, we don’t limit the number of canisters in a subnet.

CanisterOutputQueueFull: StatusCode 201

This is for inter-canister calls. You will see this if your canister is seeing a lot of outgoing calls. It may be around 500 messages per queue. There is a separate queue for each canister.

IngressMessageTimeout: StatusCode 202

Timeout is 5 minutes. This can happen if the system is quite loaded.