Passing timeouts as a string fails with FullPoolError(HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed.))

# Reproducing steps Considering this code, where timeout is a string, which is incorrect: ```python from elasticsearch import Elasticsearch client = Elasticsearch("http://localhost:9200", basic_auth=("elastic", "changeme"), request_timeout="1") client.info() ``` # What happens The code fails as follows: ```python perform_request GET / None {'user-agent': 'elasticsearch-py/9.4.0 (Python/3.14.0; elastic-transport/9.4.0)', 'connection': 'keep-alive', 'authorization': 'Basic <hidden>', 'accept': 'application/vnd.elasticsearch+json; compatible-with=9', 'x-elastic-client-meta': 'es=9.4.0,py=3.14.0,t=9.4.0,ur=2.6.3'} {'timeout': '1'} HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed. perform_request GET / None {'user-agent': 'elasticsearch-py/9.4.0 (Python/3.14.0; elastic-transport/9.4.0)', 'connection': 'keep-alive', 'authorization': 'Basic <hidden>', 'accept': 'application/vnd.elasticsearch+json; compatible-with=9', 'x-elastic-client-meta': 'es=9.4.0,py=3.14.0,t=9.4.0,ur=2.6.3'} {'timeout': '1'} HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed. perform_request GET / None {'user-agent': 'elasticsearch-py/9.4.0 (Python/3.14.0; elastic-transport/9.4.0)', 'connection': 'keep-alive', 'authorization': 'Basic <hidden>', 'accept': 'application/vnd.elasticsearch+json; compatible-with=9', 'x-elastic-client-meta': 'es=9.4.0,py=3.14.0,t=9.4.0,ur=2.6.3'} {'timeout': '1'} HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed. perform_request GET / None {'user-agent': 'elasticsearch-py/9.4.0 (Python/3.14.0; elastic-transport/9.4.0)', 'connection': 'keep-alive', 'authorization': 'Basic <hidden>', 'accept': 'application/vnd.elasticsearch+json; compatible-with=9', 'x-elastic-client-meta': 'es=9.4.0,py=3.14.0,t=9.4.0,ur=2.6.3'} {'timeout': '1'} HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed. Traceback (most recent call last): File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/elastic_transport/_node/_http_urllib3.py", line 168, in perform_request response = self.pool.urlopen( method, ...<4 lines>... **kw, # type: ignore[arg-type] ) File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/connectionpool.py", line 864, in urlopen self._put_conn(conn) ~~~~~~~~~~~~~~^^^^^^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/connectionpool.py", line 322, in _put_conn raise FullPoolError( ...<2 lines>... ) from None urllib3.exceptions.FullPoolError: HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed. The above exception was the direct cause of the following exception: Traceback (most recent call last): File ".../elasticsearch-py/t.py", line 4, in <module> client.info() ~~~~~~~~~~~^^ File ".../elasticsearch-py/elasticsearch/_sync/client/utils.py", line 421, in wrapped return api(*args, **kwargs) File ".../elasticsearch-py/elasticsearch/_sync/client/__init__.py", line 3028, in info return self.perform_request( # type: ignore[return-value] ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ "GET", ^^^^^^ ...<4 lines>... path_parts=__path_parts, ^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File ".../elasticsearch-py/elasticsearch/_sync/client/_base.py", line 272, in perform_request response = self._perform_request( method, ...<4 lines>... otel_span=otel_span, ) File ".../elasticsearch-py/elasticsearch/_sync/client/_base.py", line 320, in _perform_request meta, resp_body = self.transport.perform_request( ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ method, ^^^^^^^ ...<8 lines>... otel_span=otel_span, ^^^^^^^^^^^^^^^^^^^^ ) ^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/elastic_transport/_transport.py", line 346, in perform_request resp = node.perform_request( method, ...<3 lines>... request_timeout=request_timeout, ) File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/elastic_transport/_node/_http_urllib3.py", line 204, in perform_request raise err from e elastic_transport.ConnectionError: Connection error caused by: ConnectionError(Connection error caused by: FullPoolError(HTTPConnectionPool(host='localhost', port=9200): Pool reached maximum size and no more connections are allowed.)) ``` The error has nothing to do with the root cause. # What you expected to happen I expected a clear error, like what happens with this urllib3-native code: ```python import urllib3 r = urllib3.request( "GET", "http://localhost:9200/", headers=urllib3.make_headers(basic_auth="elastic:changeme"), timeout="1", ) print(r.json()) ``` which fails with a clear error: ```python Traceback (most recent call last): File ".../elasticsearch-py/t2.py", line 3, in <module> r = urllib3.request( "GET", ...<2 lines>... timeout="1", ) File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/__init__.py", line 193, in request return _DEFAULT_POOL.request( ~~~~~~~~~~~~~~~~~~~~~^ method, ^^^^^^^ ...<9 lines>... json=json, ^^^^^^^^^^ ) ^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/_request_methods.py", line 135, in request return self.request_encode_url( ~~~~~~~~~~~~~~~~~~~~~~~^ method, ^^^^^^^ ...<3 lines>... **urlopen_kw, ^^^^^^^^^^^^^ ) ^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/_request_methods.py", line 182, in request_encode_url return self.urlopen(method, url, **extra_kw) ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/poolmanager.py", line 457, in urlopen response = conn.urlopen(method, u.request_uri, **kw) File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/connectionpool.py", line 765, in urlopen timeout_obj = self._get_timeout(timeout) File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/connectionpool.py", line 356, in _get_timeout return Timeout.from_float(timeout) ~~~~~~~~~~~~~~~~~~^^^^^^^^^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/util/timeout.py", line 186, in from_float return Timeout(read=timeout, connect=timeout) File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/util/timeout.py", line 115, in __init__ self._connect = self._validate_timeout(connect, "connect") ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ File ".../elasticsearch-py/.venv/lib/python3.14t/site-packages/urllib3/util/timeout.py", line 165, in _validate_timeout raise ValueError( ...<2 lines>... ) from None ValueError: Timeout value connect was 1, but it must be an int, float or None. ``` I tried reproducing from elastic-transport, but failed to do so, sorry.