This error occurs when a Terraform provider plugin crashes or fails to communicate via gRPC. It typically indicates the provider encountered an unhandled error and stopped responding to Terraform.
Terraform providers run as separate processes communicating through gRPC protocol. When a provider crashes, times out, or encounters a fatal error, it stops responding to Terraform's requests. This can happen during ConfigureProvider, ReadResource, PlanResourceChange, or ApplyResourceChange operations. The plugin logs contain the actual error details.
Run Terraform with debug output to get more detailed error information:
TF_LOG=DEBUG terraform applyThe plugin logs will contain the actual panic message or error details explaining what went wrong.
Examine the plugin logs carefully. Common issues include:
- runtime error: invalid memory address or nil pointer dereference - indicates a bug in the provider
- DNS resolution errors - network/VPN connectivity issue
- Authentication/token errors - invalid credentials or expired tokens
Note the exact error for reporting or searching for fixes.
Provider crashes are often bugs fixed in newer versions:
terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 5.0"
}
}
}Run:
terraform init -upgrade
terraform applyEnsure you're using supported versions. Check the provider's documentation for minimum required Terraform version:
terraform version
terraform providersDowngrade Terraform or the provider if versions are incompatible.
The crash may be caused by invalid data passed to the resource. Review your configuration:
- Check for required fields that might be null
- Verify data types match the resource schema
- Look for circular dependencies or invalid references
Simplify the configuration to isolate which block causes the crash.
If errors mention DNS or API timeouts:
# Test connectivity to cloud provider APIs
ping api.example.com
dig api.example.com
# If on VPN, verify proxy/DNS settings
echo $http_proxyDisconnect from VPN, try again, or check your network/proxy configuration.
Some resources support timeout configuration:
resource "aws_instance" "example" {
# ... other config ...
timeouts {
create = "10m"
delete = "10m"
}
}Check the resource documentation for supported timeout blocks.
If the error persists after the above steps, it's likely a provider bug. Open an issue on the provider's GitHub repository with:
- Terraform version
- Provider version
- Full debug output from TF_LOG=DEBUG terraform apply
- Minimal reproduction configuration
- The complete error/panic message from plugin logs
Include the full stack trace if available.
Plugin crashes can be intermittent if they only occur under certain conditions (large datasets, specific API responses). When reporting issues, include the full debug output and reproduction steps. Some providers support provider-level logging (e.g., AWS SDK debug logging) which may reveal more details than TF_LOG=DEBUG. For VPN-related crashes, the issue is often DNS resolution failure when the provider queries cloud APIs - verify DNS resolution works for all required endpoints.
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