1  Deprecations

1 Deprecations

This document lists all deprecated functionality in Erlang/OTP. For more information regarding the strategy regarding deprecations see the documentation of Support, Compatibility, Deprecations, and Removal.

  • file:pid2name/1 (this functionality is no longer supported)
  • erts_alloc_config:_/_ (this module will be removed in OTP 26.0. See the documentation for details)
  • disk_log:accessible_logs/0 (use disk_log:all/0 instead)
  • disk_log:lclose/1 (use disk_log:close/1 instead)
  • disk_log:lclose/2 (use disk_log:close/1 instead)
  • erlang:phash/2 (use erlang:phash2/2 instead)
  • ftp:start_service/1 (use ftp:open/2 instead)
  • ftp:stop_service/1 (use ftp:close/1 instead)

The Old API is now deprecated and has also been scheduled for removal.

For replacement functions see the New API.

Since OTP 21 the recommended module to handle URIs is uri_string. The module http_uri does not provide a implementation that satisfies the RFC.

The public key algorithm 'ssh-rsa is regarded as insecure due to its usage of SHA1, and is therefore deprecated. It will not be available by default from OTP-24.

The public key algorithm 'ssh-dss is regarded as insecure due to its usage of SHA1 and its short key length, and is therefore deprecated. It is not available by default from OTP-23.

As of OTP 23, a new process group implementation pg is introduced. pg is similar to pg2, but with much better scalability properties. However, the API and behavior are not compatible.

pg2 is now deprecated and has also been scheduled for removal in OTP 24.

As of OTP 23, the distributed disk_log feature has been deprecated and it has also been scheduled for removal in OTP 24.

As of OTP 23, the registry functionality part of erl_interface has been deprecated and it has also been removed in OTP 24.

  • erl_tidy:_/_ (use https://github.com/richcarl/erl_tidy)
  • filename:safe_relative_path/1 (use filelib:safe_relative_path/2 instead)
  • http_uri:decode/1 (use uri_string functions instead)
  • http_uri:encode/1 (use uri_string functions instead)
  • http_uri:parse/1 (use uri_string functions instead)
  • http_uri:parse/2 (use uri_string functions instead)
  • http_uri:scheme_defaults/0 (use uri_string functions instead)
  • httpd:parse_query/1 (use uri_string:dissect_query/1 instead)
  • igor:_/_ (use https://github.com/richcarl/igor)
  • pg2:_/_ (use 'pg' instead)
  • snmpm:async_get/3 (use snmpm:async_get2/3 instead.)
  • snmpm:async_get/4 (use snmpm:async_get2/4 instead.)
  • snmpm:async_get/5 (use snmpm:async_get2/4 instead.)
  • snmpm:async_get/6 (use snmpm:async_get2/4 instead.)
  • snmpm:async_get_bulk/5 (use snmpm:async_get_bulk2/5 instead.)
  • snmpm:async_get_bulk/6 (use snmpm:async_get_bulk2/6 instead.)
  • snmpm:async_get_bulk/7 (use snmpm:async_get_bulk2/6 instead.)
  • snmpm:async_get_bulk/8 (use snmpm:async_get_bulk2/6 instead.)
  • snmpm:async_get_next/3 (use snmpm:async_get_next2/3 instead.)
  • snmpm:async_get_next/4 (use snmpm:async_get_next2/4 instead.)
  • snmpm:async_get_next/5 (use snmpm:async_get_next2/4 instead.)
  • snmpm:async_get_next/6 (use snmpm:async_get_next2/4 instead.)
  • snmpm:async_set/3 (use snmpm:async_set2/3 instead.)
  • snmpm:async_set/4 (use snmpm:async_set2/4 instead.)
  • snmpm:async_set/5 (use snmpm:async_set2/4 instead.)
  • snmpm:async_set/6 (use snmpm:async_set2/4 instead.)
  • snmpm:sync_get/3 (use snmpm:sync_get2/3 instead.)
  • snmpm:sync_get/4 (use snmpm:sync_get2/4 instead.)
  • snmpm:sync_get/5 (use snmpm:sync_get2/4 instead.)
  • snmpm:sync_get/6 (use snmpm:sync_get2/4 instead.)
  • snmpm:sync_get_bulk/5 (use snmpm:sync_get_bulk2/5 instead.)
  • snmpm:sync_get_bulk/6 (use snmpm:sync_get_bulk2/6 instead.)
  • snmpm:sync_get_bulk/7 (use snmpm:sync_get_bulk2/6 instead.)
  • snmpm:sync_get_bulk/8 (use snmpm:sync_get_bulk2/6 instead.)
  • snmpm:sync_get_next/3 (use snmpm:sync_get_next2/3 instead.)
  • snmpm:sync_get_next/4 (use snmpm:sync_get_next2/4 instead.)
  • snmpm:sync_get_next/5 (use snmpm:sync_get_next2/4 instead.)
  • snmpm:sync_get_next/6 (use snmpm:sync_get_next2/4 instead.)
  • snmpm:sync_set/3 (use snmpm:sync_set2/3 instead.)
  • snmpm:sync_set/4 (use snmpm:sync_set2/4 instead.)
  • snmpm:sync_set/5 (use snmpm:sync_set2/4 instead.)
  • snmpm:sync_set/6 (use snmpm:sync_set2/4 instead.)

Some parts of OTP has had limited VxWorks support, such as for example erl_interface. This support is now deprecated and has also been scheduled for removal in OTP 23.

The old legacy erl_interface library (functions with prefix erl_) is deprecated as of OTP 22. These parts of erl_interface has been informally deprecated for a very long time. You typically want to replace the usage of the erl_interface library with the use of the ei library which also is part of the erl_interface application. The old legacy erl_interface library has also been scheduled for removal in OTP 23.

The format of "System Events" as defined in the man page for sys has been clarified and cleaned up. Due to this, code that relied on the internal badly documented previous (before this change) format of OTP's "System Events", needs to be changed.

In the wake of this the function sys:get_debug/3 that returns data with undocumented and internal format (and therefore is practically useless) has been deprecated, and a new function sys:get_log/1 has been added, that hopefully does what the deprecated function was intended for.

  • crypto:block_decrypt/3 (use crypto:crypto_one_time/4 or crypto:crypto_init/3 + crypto:crypto_update/2 + crypto:crypto_final/1 instead)
  • crypto:block_decrypt/4 (use crypto:crypto_one_time/5, crypto:crypto_one_time_aead/6,7 or crypto:crypto_(dyn_iv)?_init + crypto:crypto_(dyn_iv)?_update + crypto:crypto_final instead)
  • crypto:block_encrypt/3 (use crypto:crypto_one_time/4 or crypto:crypto_init/3 + crypto:crypto_update/2 + crypto:crypto_final/1 instead)
  • crypto:block_encrypt/4 (use crypto:crypto_one_time/5, crypto:crypto_one_time_aead/6,7 or crypto:crypto_(dyn_iv)?_init + crypto:crypto_(dyn_iv)?_update + crypto:crypto_final instead)
  • crypto:cmac/3 (use crypto:mac/4 instead)
  • crypto:cmac/4 (use crypto:macN/5 instead)
  • crypto:hmac/3 (use crypto:mac/4 instead)
  • crypto:hmac/4 (use crypto:macN/5 instead)
  • crypto:hmac_final/1 (use crypto:mac_final/1 instead)
  • crypto:hmac_final_n/2 (use crypto:mac_finalN/2 instead)
  • crypto:hmac_init/2 (use crypto:mac_init/3 instead)
  • crypto:hmac_update/2 (use crypto:mac_update/2 instead)
  • crypto:next_iv/_ (see the 'New and Old API' chapter of the CRYPTO User's guide)
  • crypto:poly1305/2 (use crypto:mac/3 instead)
  • crypto:stream_decrypt/2 (use crypto:crypto_update/2 instead)
  • crypto:stream_encrypt/2 (use crypto:crypto_update/2 instead)
  • crypto:stream_init/_ (use crypto:crypto_init/3 + crypto:crypto_update/2 + crypto:crypto_final/1 or crypto:crypto_one_time/4 instead)
  • net:broadcast/3 (use rpc:eval_everywhere/3 instead)
  • net:call/4 (use rpc:call/4 instead)
  • net:cast/4 (use rpc:cast/4 instead)
  • net:ping/1 (use net_adm:ping/1 instead)
  • net:relay/1 (use slave:relay/1 instead)
  • net:sleep/1 (use 'receive after T -> ok end' instead)
  • sys:get_debug/3 (incorrectly documented and only for internal use. Can often be replaced with sys:get_log/1)
  • ssl:cipher_suites/0 (use cipher_suites/2,3 instead)
  • ssl:cipher_suites/1 (use cipher_suites/2,3 instead)
  • ssl:ssl_accept/_ (use ssl_handshake/1,2,3 instead)
  • crypto:rand_uniform/2 (use rand:uniform/1 instead)
  • erlang:get_stacktrace/0 (use the new try/catch syntax for retrieving the stack backtrace)
  • filename:find_src/_ (use filelib:find_source/1,3 instead)
  • gen_fsm:_/_ (use the 'gen_statem' module instead)

For security reasons SSL-3.0 is no longer supported by default, but can be configured.

  • code:rehash/0 (the code path cache feature has been removed)
  • queue:lait/1 (use queue:liat/1 instead)
  • random:_/_ (use the 'rand' module instead)

New time functionality and a new time API was introduced. For more information see the Time and Time Correction chapter in the ERTS User's guide and specifically the Dos and Donts section on how to replace usage of erlang:now/0.

API functions in the module httpd_conf was deprecated in favor of standard modules such as lists, string, filelib, and erlang.

  • erlang:now/0 (see the "Time and Time Correction in Erlang" chapter of the ERTS User's Guide for more information)
  • megaco:format_versions/1 (use megaco:print_version_info/0,1 instead.)
  • snmpa:old_info_format/1 (use "new" format instead)
  • wxCalendarCtrl:enableYearChange/1 (not available in wxWidgets-2.9 and later)
  • wxCalendarCtrl:enableYearChange/2 (not available in wxWidgets-2.9 and later)
  • wxClientDC:new/0 (not available in wxWidgets-2.9 and later)
  • wxCursor:new/3 (not available in wxWidgets-2.9 and later)
  • wxCursor:new/4 (not available in wxWidgets-2.9 and later)
  • wxDC:computeScaleAndOrigin/1 (not available in wxWidgets-2.9 and later)
  • wxGraphicsRenderer:createLinearGradientBrush/7 (not available in wxWidgets-2.9 and later)
  • wxGraphicsRenderer:createRadialGradientBrush/8 (not available in wxWidgets-2.9 and later)
  • wxGridCellEditor:endEdit/4 (not available in wxWidgets-2.9 and later)
  • wxGridCellEditor:paintBackground/3 (not available in wxWidgets-2.9 and later)
  • wxIdleEvent:canSend/1 (not available in wxWidgets-2.9 and later)
  • wxMDIClientWindow:new/1 (not available in wxWidgets-2.9 and later)
  • wxMDIClientWindow:new/2 (not available in wxWidgets-2.9 and later)
  • wxPaintDC:new/0 (not available in wxWidgets-2.9 and later)
  • wxPostScriptDC:getResolution/0 (not available in wxWidgets-2.9 and later)
  • wxPostScriptDC:setResolution/1 (not available in wxWidgets-2.9 and later)
  • wxWindowDC:new/0 (not available in wxWidgets-2.9 and later)

inets - httpd Apache config files

A new config file format was introduced.

  • auth:cookie/0 (use erlang:get_cookie/0 instead)
  • auth:cookie/1 (use erlang:set_cookie/2 instead)
  • auth:is_auth/1 (use net_adm:ping/1 instead)
  • auth:node_cookie/_ (use erlang:set_cookie/2 and net_adm:ping/1 instead)
  • calendar:local_time_to_universal_time/1 (use calendar:local_time_to_universal_time_dst/1 instead)
  • snmp:add_agent_caps/2 (use snmpa:add_agent_caps/2 instead.)
  • snmp:c/1 (use snmpc:compile/1 instead.)
  • snmp:c/2 (use snmpc:compile/2 instead.)
  • snmp:change_log_size/1 (use snmpa:change_log_size/1 instead.)
  • snmp:compile/3 (use snmpc:compile/3 instead.)
  • snmp:current_address/0 (use snmpa:current_address/0 instead.)
  • snmp:current_community/0 (use snmpa:current_community/0 instead.)
  • snmp:current_context/0 (use snmpa:current_context/0 instead.)
  • snmp:current_net_if_data/0 (use snmpa:current_net_if_data/0 instead.)
  • snmp:current_request_id/0 (use snmpa:current_request_id/0 instead.)
  • snmp:del_agent_caps/1 (use snmpa:del_agent_caps/1 instead.)
  • snmp:dump_mibs/0 (use snmpa:dump_mibs/0 instead.)
  • snmp:dump_mibs/1 (use snmpa:dump_mibs/1 instead.)
  • snmp:enum_to_int/2 (use snmpa:enum_to_int/2 instead.)
  • snmp:enum_to_int/3 (use snmpa:enum_to_int/3 instead.)
  • snmp:get/2 (use snmpa:get/2 instead.)
  • snmp:get_agent_caps/0 (use snmpa:get_agent_caps/0 instead.)
  • snmp:get_symbolic_store_db/0 (use snmpa:get_symbolic_store_db/0 instead.)
  • snmp:info/1 (use snmpa:info/1 instead.)
  • snmp:int_to_enum/2 (use snmpa:int_to_enum/2 instead.)
  • snmp:int_to_enum/3 (use snmpa:int_to_enum/3 instead.)
  • snmp:is_consistent/1 (use snmpc:is_consistent/1 instead.)
  • snmp:load_mibs/2 (use snmpa:load_mibs/2 instead.)
  • snmp:log_to_txt/2 (use snmpa:log_to_txt/2 instead.)
  • snmp:log_to_txt/3 (use snmpa:log_to_txt/3 instead.)
  • snmp:log_to_txt/4 (use snmpa:log_to_txt/4 instead.)
  • snmp:mib_to_hrl/1 (use snmpc:mib_to_hrl/1 instead.)
  • snmp:name_to_oid/1 (use snmpa:name_to_oid/1 instead.)
  • snmp:name_to_oid/2 (use snmpa:name_to_oid/2 instead.)
  • snmp:oid_to_name/1 (use snmpa:oid_to_name/1 instead.)
  • snmp:oid_to_name/2 (use snmpa:oid_to_name/2 instead.)
  • snmp:register_subagent/3 (use snmpa:register_subagent/3 instead.)
  • snmp:send_notification/3 (use snmpa:send_notification/3 instead.)
  • snmp:send_notification/4 (use snmpa:send_notification/4 instead.)
  • snmp:send_notification/5 (use snmpa:send_notification/5 instead.)
  • snmp:send_notification/6 (use snmpa:send_notification/6 instead.)
  • snmp:send_trap/3 (use snmpa:send_trap/3 instead.)
  • snmp:send_trap/4 (use snmpa:send_trap/4 instead.)
  • snmp:unload_mibs/2 (use snmpa:unload_mibs/2 instead.)
  • snmp:unregister_subagent/2 (use snmpa:unregister_subagent/2 instead.)

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