t8y2/dbx · error

decode ZooKeeper session timeout: %w

Error message

decode ZooKeeper session timeout: %w

What it means

Returned by newProtocolZooKeeperClient when the negotiated session timeout field of the connect response cannot be decoded (buffer exhausted after the protocol version). The reply frame is malformed — truncated response or unexpected encoding from the server.

Source

Thrown at agents/drivers/hive-go/zookeeper_protocol.go:167

	request := &zooKeeperEncoder{}
	request.int32(zooKeeperProtocolVersion)
	request.int64(0)
	request.int32(zooKeeperTimeoutMillis(timeout))
	request.int64(0)
	request.bytes(make([]byte, 16))
	if err := client.writeFrame(request.data()); err != nil {
		return nil, fmt.Errorf("send ZooKeeper connect request: %w", err)
	}
	response, err := client.readFrame()
	if err != nil {
		return nil, fmt.Errorf("read ZooKeeper connect response: %w", err)
	}
	decoder := newZooKeeperDecoder(response)
	if _, err := decoder.int32(); err != nil {
		return nil, fmt.Errorf("decode ZooKeeper protocol version: %w", err)
	}
	if _, err := decoder.int32(); err != nil {
		return nil, fmt.Errorf("decode ZooKeeper session timeout: %w", err)
	}
	sessionID, err := decoder.int64()
	if err != nil {
		return nil, fmt.Errorf("decode ZooKeeper session ID: %w", err)
	}
	if _, err := decoder.bytes(); err != nil {
		return nil, fmt.Errorf("decode ZooKeeper session password: %w", err)
	}
	if sessionID == 0 {
		return nil, zk.ErrSessionExpired
	}
	return client, nil
}

func zooKeeperTimeoutMillis(timeout time.Duration) int32 {
	milliseconds := timeout.Milliseconds()
	if milliseconds < 1 {
		return 1

View on GitHub (pinned to c0390bff16)

Solutions

1. Verify the server is a ZooKeeper ensemble member running a compatible version
2. Check for intermediaries (proxies, NAT) altering the byte stream
3. Retry the connection against another ensemble address

When it happens

Trigger: Thrown at agents/drivers/hive-go/zookeeper_protocol.go:167 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Timeouts: ETIMEDOUT, deadlines, and hung requests — what actually expires when a request times out.

AI-assisted analysis of t8y2/dbx@c0390bff16 (2026-09-05). Data as JSON: /api/errors/9cd16d7fa1ddf56a. Report an issue: GitHub.