platform_api_server crashing during platform_tests/api/test_sfp.py::TestSfpApi::test_reset

[arista-nwolfe]

platform_tests/api/test_sfp.py::TestSfpApi::test_reset is failing with:

>           raise RemoteDisconnected("Remote end closed connection without"
                                     " response")
E           http.client.RemoteDisconnected: Remote end closed connection without response

When sfp.reset(platform_api_conn, i) is run the platform_api_server on the dut crashes with the following traceback:

pmon#supervisord: platform_api_server ----------------------------------------
pmon#supervisord: platform_api_server Exception occurred during processing of request from ('10.243.232.10', 38042)
pmon#supervisord: platform_api_server Traceback (most recent call last):
pmon#supervisord: platform_api_server   File "/usr/lib/python3.11/socketserver.py", line 317, in _handle_request_noblock
pmon#supervisord: platform_api_server     self.process_request(request, client_address)
pmon#supervisord: platform_api_server   File "/usr/lib/python3.11/socketserver.py", line 348, in process_request
pmon#supervisord: platform_api_server     self.finish_request(request, client_address)
pmon#supervisord: platform_api_server   File "/usr/lib/python3.11/socketserver.py", line 361, in finish_request
pmon#supervisord: platform_api_server     self.RequestHandlerClass(request, client_address, self)
pmon#supervisord: platform_api_server   File "/usr/lib/python3.11/socketserver.py", line 755, in __init__
pmon#supervisord: platform_api_server     self.handle()
pmon#supervisord: platform_api_server   File "/usr/lib/python3.11/http/server.py", line 432, in handle
pmon#supervisord: platform_api_server     self.handle_one_request()
pmon#supervisord: platform_api_server   File "/usr/lib/python3.11/http/server.py", line 420, in handle_one_request
pmon#supervisord: platform_api_server     method()
pmon#supervisord: platform_api_server   File "/opt/platform_api_server.py", line 58, in do_POST
pmon#supervisord: platform_api_server     self.do_platform_api()
pmon#supervisord: platform_api_server   File "/opt/platform_api_server.py", line 94, in do_platform_api
pmon#supervisord: platform_api_server     res = getattr(obj, api)(*args)
pmon#supervisord: platform_api_server           ^^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/lib/python3/dist-packages/arista/utils/sonic_platform/sfp_optoe.py", line 110, in reset
pmon#supervisord: platform_api_server     if self.sfp_type == "SFP":
pmon#supervisord: platform_api_server        ^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/lib/python3/dist-packages/arista/utils/sonic_platform/sfp_optoe.py", line 35, in sfp_type
pmon#supervisord: platform_api_server     self._sfp_type = self._detect_sfp_type()
pmon#supervisord: platform_api_server                      ^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/lib/python3/dist-packages/arista/utils/sonic_platform/sfp_optoe.py", line 40, in _detect_sfp_type
pmon#supervisord: platform_api_server     info = self.get_transceiver_info()
pmon#supervisord: platform_api_server            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/local/lib/python3.11/dist-packages/sonic_platform_base/sonic_xcvr/sfp_optoe_base.py", line 28, in get_transceiver_info
pmon#supervisord: platform_api_server     return api.get_transceiver_info() if api is not None else None
pmon#supervisord: platform_api_server            ^^^^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/local/lib/python3.11/dist-packages/sonic_platform_base/sonic_xcvr/api/public/sff8636.py", line 29, in get_transceiver_info
pmon#supervisord: platform_api_server     serial_id = self.xcvr_eeprom.read(consts.SERIAL_ID_FIELD)
pmon#supervisord: platform_api_server                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/local/lib/python3.11/dist-packages/sonic_platform_base/sonic_xcvr/xcvr_eeprom.py", line 26, in read
pmon#supervisord: platform_api_server     raw_data = self.reader(field.get_offset(), field.get_size())
pmon#supervisord: platform_api_server                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/local/lib/python3.11/dist-packages/sonic_platform_base/sonic_xcvr/sfp_optoe_base.py", line 260, in read_eeprom
pmon#supervisord: platform_api_server     self.get_optoe_current_page() != 0:
pmon#supervisord: platform_api_server     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pmon#supervisord: platform_api_server   File "/usr/local/lib/python3.11/dist-packages/sonic_platform_base/sonic_xcvr/sfp_optoe_base.py", line 241, in get_optoe_current_page
pmon#supervisord: platform_api_server     return self.read_eeprom(SFP_OPTOE_PAGE_SELECT_OFFSET, 1)[0]
pmon#supervisord: platform_api_server            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^
pmon#supervisord: platform_api_server TypeError: 'NoneType' object is not subscriptable
pmon#supervisord: platform_api_server ----------------------------------------

This code to read the eeprom was added recently by sonic-net/sonic-platform-common#548

[rlhui]

@prgeor , would you please take a look?