hashicorp/terraform · error

Failed to read state file from

Error message

Failed to read state file from %v: %v

What it means

Thrown by Get after the reader was opened successfully but ioutil.ReadAll failed while streaming the state object's bytes. The reader was constructed but the transfer aborted partway.

Solutions

1. Retry the read; streaming errors are frequently transient.
2. Check for client-side HTTP timeout configuration that may cancel long reads.
3. If state is unusually large, consider splitting or pruning resources to reduce size.
4. Inspect the wrapped %v for transport-level detail (e.g., 'unexpected EOF').

Example fix

// no code change — retry terraform; if persistent:
// increase http timeout / verify network stability

// No deterministic pre-check; size-check the object if known.
// gsutil ls -L gs://bucket/prefix/default.tfstate

// Retry the read with backoff on transient stream errors.
var contents []byte
for i := 0; i < 3; i++ {
    r, err := f.NewReader(ctx)
    if err != nil { ... }
    contents, err = ioutil.ReadAll(r)
    r.Close()
    if err == nil { break }
    if !isTransient(err) { return err }
}

When it happens

Trigger: ioutil.ReadAll(stateFileReader) returns an error — connection reset mid-stream, payload too large for available memory, decompression error, or transient GCS read timeout.

Common situations: Large state file over a flaky connection; GCS returns partial data then closes; client timeout (http client transport) cancelled the stream; memory pressure in CI runners.

Related errors

• Failed to read state file attrs from
• Failed to open state file at
• storage.NewClient() failed
• Failed to delete state file
• Failed to upload state to

AI-assisted analysis of hashicorp/terraform@d32a084675 (2026-08-11). Data as JSON: /api/errors/25bd9ce8e4769a1a. Report an issue: GitHub.

Appendix: source

Thrown at internal/backend/remote-state/gcs/client.go:47

	encryptionKey []byte
	kmsKeyName    string
}

func (c *remoteClient) Get() (payload *remote.Payload, diags tfdiags.Diagnostics) {
	ctx := context.TODO()
	stateFileReader, err := c.stateFile().NewReader(ctx)
	if err != nil {
		if err == storage.ErrObjectNotExist {
			return nil, diags
		} else {
			return nil, diags.Append(fmt.Errorf("Failed to open state file at %v: %v", c.stateFileURL(), err))
		}
	}
	defer stateFileReader.Close()

	stateFileContents, err := ioutil.ReadAll(stateFileReader)
	if err != nil {
		return nil, diags.Append(fmt.Errorf("Failed to read state file from %v: %v", c.stateFileURL(), err))
	}

	stateFileAttrs, err := c.stateFile().Attrs(ctx)
	if err != nil {
		return nil, diags.Append(fmt.Errorf("Failed to read state file attrs from %v: %v", c.stateFileURL(), err))
	}

	result := &remote.Payload{
		Data: stateFileContents,
		MD5:  stateFileAttrs.MD5,
	}

	return result, diags
}

func (c *remoteClient) Put(data []byte) tfdiags.Diagnostics {
	var diags tfdiags.Diagnostics
	ctx := context.TODO()

View on GitHub (pinned to d32a084675)