plandex-ai/plandex · critical

error getting active model stream: %v

Error message

error getting active model stream: %v

What it means

After the in-memory active-plan check, activatePlan queries db.GetActiveModelStream(plan.Id, branch). If that database call fails, the error is wrapped and returned as "error getting active model stream: %v". This is a storage/persistence failure during activation, not a business conflict.

Source

Thrown at app/server/model/plan/activate.go:41

	sessionId string,
) (*types.ActivePlan, error) {
	log.Printf("Activate plan: plan ID %s on branch %s\n", plan.Id, branch)

	// Just in case this request was made immediately after another stream finished, wait a little to allow for cleanup
	log.Println("Waiting 100ms before checking for active plan")
	time.Sleep(100 * time.Millisecond)
	log.Println("Done waiting, checking for active plan")

	active := GetActivePlan(plan.Id, branch)
	if active != nil {
		log.Printf("Tell: Active plan found for plan ID %s on branch %s\n", plan.Id, branch) // Log if an active plan is found
		return nil, fmt.Errorf("plan %s branch %s already has an active stream on this host", plan.Id, branch)
	}

	modelStream, err := db.GetActiveModelStream(plan.Id, branch)
	if err != nil {
		log.Printf("Error getting active model stream: %v\n", err)
		return nil, fmt.Errorf("error getting active model stream: %v", err)
	}

	if modelStream != nil {
		log.Printf("Tell: Active model stream found for plan ID %s on branch %s on host %s\n", plan.Id, branch, modelStream.InternalIp) // Log if an active model stream is found
		return nil, fmt.Errorf("plan %s branch %s already has an active stream on host %s", plan.Id, branch, modelStream.InternalIp)
	}

	active = CreateActivePlan(
		auth.OrgId,
		auth.User.Id,
		plan.Id,
		branch,
		prompt,
		buildOnly,
		autoContext,
		sessionId,
	)

View on GitHub (pinned to e2d772072e)

Solutions

1. Read the wrapped cause (%v payload) and fix the underlying DB error (connectivity, auth, schema).
2. Verify DB reachability and credentials from the server host.
3. Run pending migrations so the active-model-stream schema exists.
4. Retry activation after transient DB failures; add backoff on the caller side.

Example fix

// before: raw call without health guard
if !dbHealthy() { return errors.New("db not ready") }
_, err := db.GetActiveModelStream(planId, branch)
// after: retry transient DB errors
stream, err := db.GetActiveModelStream(planId, branch)
if isTransientDBErr(err) { time.Sleep(time.Second); stream, err = db.GetActiveModelStream(planId, branch) }

if err := db.Ping(); err != nil {
    return fmt.Errorf("database unavailable before plan activation: %w", err)
}

_, err := Tell(ctx, req)
if err != nil && strings.Contains(err.Error(), "error getting active model stream") {
    // retry after DB recovers
    time.Sleep(2 * time.Second)
    _, err = Tell(ctx, req)
}

When it happens

Trigger: db.GetActiveModelStream returns a database error: DB connection failure, timeout, schema/migration mismatch, or locked database while another writer holds a transaction.

Common situations: Database unreachable after a deploy, expired DB credentials, migration lag where the model_streams table is missing a column, or sqlite/file DB lock contention.

Understand the failure class

Background: Database query failed: Internal Server Error 500s wrapping SQL, Prisma, and connection failures — what to check first — this error's family across 16 libraries.

Related errors

• error storing model stream: %v
• error storing convo message description: %v
• error storing description: %v
• Error storing plan build result: %v
• error storing convo message: %v

AI-assisted analysis of plandex-ai/plandex@e2d772072e (2026-09-05). Data as JSON: /api/errors/1a06e0112da9c338. Report an issue: GitHub.