Alpaca-py issues - Max retries exceeded / NewConnectionError

Alpaca Integration Applications
1

I just upgraded to alpaca-py and am trying to get historical crypto data using my broker api keys.

I can get one or two tickers but after that it just throws the max retry exception:

HTTPSConnectionPool(host=‘data.alpaca.markets’, port=443): Max retries exceeded with url: /v1beta2/crypto/bars?start=2019-11-12&end=2022-07-31&timeframe=1Day&symbols=BTC%2FUSD (Caused by NewConnectionError(‘<urllib3.connection.HTTPSConnection object at 0x4097e470a0>: Failed to establish a new connection: [Errno 110] Connection timed out’))

I don’t think im going over the 200 request per minute limit. (I proved this by waiting 2 minutes and making a single request).

I must be doing something wrong because if there was a problem with alpaca-py, im sure others would have complained by now. How can I figure out why Im getting an NewConnectionError?

Thanks,
Brett

2

I’m going to post a different question in the market data section. I think the issue is im trying to send api keys to not get rate limited, and im probably sending the wrong keys to the wrong url_override.

3

I was getting HTTPSConnectionPool errors a few days ago and started another thread for that. Mine was complaining about server not responding before timeout.

I was trying to retrieve positions and 1 minute bars. I have increased
APCA_RETRY_MAX and APCA_RETRY_WAIT to value of 5 and it seems to somewhat work for 1 minute bar retrieval. This morning it took over 70 retries at 5 second intervals to retrieve 1 minute candle for symbol “BJ”. That is an awful delay of almost 10 minutes before a successful response.

4

I’ve been getting a similar error, intermittently, but only in the past couple of days, when requesting option snapshots. Not sure if this is because this is a beta route or what.
"HTTPSConnectionPool(host='data.alpaca.markets', port=443): Max retries exceeded with url: /v1beta1/options/snapshots?symbols=TSLA260220C00417500%2CTSLA260220C00415000&limit=1000 (Caused by SSLError(SSLEOFError(8, '[SSL: UNEXPECTED_EOF_WHILE_READING] EOF occurred in violation of protocol (_ssl.c:1016)')))"

5

I am getting the same kind of errors from the last couple of days.

New York time: 2026-02-04 15:30

Traceback (most recent call last):
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/connectionpool.py”, line 715, in urlopen
httplib_response = self._make_request(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/connectionpool.py”, line 404, in _make_request
self._validate_conn(conn)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/connectionpool.py”, line 1060, in _validate_conn
conn.connect()
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/connection.py”, line 419, in connect
self.sock = ssl_wrap_socket(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/util/ssl_.py”, line 449, in ssl_wrap_socket
ssl_sock = _ssl_wrap_socket_impl(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/util/ssl_.py”, line 493, in _ssl_wrap_socket_impl
return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/ssl.py”, line 501, in wrap_socket
return self.sslsocket_class._create(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/ssl.py”, line 1074, in _create
self.do_handshake()
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/ssl.py”, line 1343, in do_handshake
self._sslobj.do_handshake()
ssl.SSLZeroReturnError: TLS/SSL connection has been closed (EOF) (_ssl.c:1133)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/requests/adapters.py”, line 667, in send
resp = conn.urlopen(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/connectionpool.py”, line 801, in urlopen
retries = retries.increment(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/urllib3/util/retry.py”, line 594, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host=‘data.alpaca.markets’, port=443): Max retries exceeded with url: /v2/stocks/SPY/bars?timeframe=1Min&adjustment=all&start=2026-02-02T08%3A00%3A00%2B00%3A00&end=2026-02-06T08%3A00%3A00%2B00%3A00 (Caused by SSLError(SSLZeroReturnError(6, ‘TLS/SSL connection has been closed (EOF) (_ssl.c:1133)’)))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/Users//Desktop/Untitled_Folder/superai_bot_mvp.py”, line 972, in
SuperAI_Trading_Bot()
File “/Users//Desktop/Untitled_Folder/superai_bot_mvp.py”, line 966, in SuperAI_Trading_Bot
on_message()
File “/Users//Desktop/Untitled_Folder/superai_bot_mvp.py”, line 862, in on_message
open_prices, high_prices, low_prices, close_prices, volume, buylesstime, selltime = prepare_data(
File “/Users//Desktop/Untitled_Folder/superai_bot_mvp.py”, line 645, in prepare_data
full_data = vbt.AlpacaData.download(asset, start=data_start, end=data_end,
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/vectorbt/data/base.py”, line 584, in download
data[s] = cls.download_symbol(s, **_kwargs)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/vectorbt/data/custom.py”, line 894, in download_symbol
df = client.get_bars(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/alpaca_trade_api/rest.py”, line 735, in get_bars
bars = list(self.get_bars_iter(symbol,
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/alpaca_trade_api/rest.py”, line 718, in get_bars_iter
for bar in bars:
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/alpaca_trade_api/rest.py”, line 594, in _data_get
resp = self.data_get(path, data=data, feed=feed,
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/alpaca_trade_api/rest.py”, line 274, in data_get
return self._request(
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/alpaca_trade_api/rest.py”, line 222, in _request
return self._one_request(method, url, opts, retry)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/alpaca_trade_api/rest.py”, line 241, in _one_request
resp = self._session.request(method, url, **opts)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/requests/sessions.py”, line 589, in request
resp = self.send(prep, **send_kwargs)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/requests/sessions.py”, line 703, in send
r = adapter.send(request, **kwargs)
File “/Users//opt/anaconda3/envs/quant-bot/lib/python3.9/site-packages/requests/adapters.py”, line 698, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host=‘data.alpaca.markets’, port=443): Max retries exceeded with url: /v2/stocks/SPY/bars?timeframe=1Min&adjustment=all&start=2026-02-02T08%3A00%3A00%2B00%3A00&end=2026-02-06T08%3A00%3A00%2B00%3A00 (Caused by SSLError(SSLZeroReturnError(6, ‘TLS/SSL connection has been closed (EOF) (_ssl.c:1133)’)))"

I have integrated retry logic, which seems to work after waiting a few seconds (typically 20-40 seconds), but that is not good because it is affecting our trading process. Is there anyone that can get this fixed?

6

The Alpaca Engineering team identified the root cause of the “connection aborted. Connection reset error 104 connection reset by peer” errors as a bug in the ingress server code. A fix has been implemented as of around 12:00 EST today 2026-02-05.

If you are still receiving these errors please reply and include your IP address if possible.

Apologies for this issue.

7

Thanks for the update Dan