This file is indexed.

/usr/lib/rabbitmq/lib/rabbitmq_server-3.5.7/ebin/rabbit_app.in is in rabbitmq-server 3.5.7-1ubuntu0.16.04.2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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{application, rabbit,           %% -*- erlang -*-
 [{description, "RabbitMQ"},
  {id, "RabbitMQ"},
  {vsn, "3.5.7"},
  {modules, []},
  {registered, [rabbit_amqqueue_sup,
                rabbit_log,
                rabbit_node_monitor,
                rabbit_router,
                rabbit_sup,
                rabbit_tcp_client_sup,
                rabbit_direct_client_sup]},
  {applications, [kernel, stdlib, sasl, mnesia, os_mon, xmerl]},
%% we also depend on crypto, public_key and ssl but they shouldn't be
%% in here as we don't actually want to start it
  {mod, {rabbit, []}},
  {env, [{tcp_listeners, [5672]},
         {ssl_listeners, []},
         {ssl_options, []},
         {vm_memory_high_watermark, 0.4},
         {vm_memory_high_watermark_paging_ratio, 0.5},
         {disk_free_limit, 50000000}, %% 50MB
         {msg_store_index_module, rabbit_msg_store_ets_index},
         {backing_queue_module, rabbit_variable_queue},
         %% 0 ("no limit") would make a better default, but that
         %% breaks the QPid Java client
         {frame_max, 131072},
         {channel_max, 0},
         {heartbeat, 60},
         {msg_store_file_size_limit, 16777216},
         {fhc_write_buffering, true},
         {fhc_read_buffering, true},
         {queue_index_max_journal_entries, 32768},
         {queue_index_embed_msgs_below, 4096},
         {default_user, <<"guest">>},
         {default_pass, <<"guest">>},
         {default_user_tags, [administrator]},
         {default_vhost, <<"/">>},
         {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},
         {loopback_users, [<<"guest">>]},
         {cluster_nodes, {[], disc}},
         {server_properties, []},
         {collect_statistics, none},
         {collect_statistics_interval, 5000},
         {mnesia_table_loading_timeout, 30000},
         {auth_mechanisms, ['PLAIN', 'AMQPLAIN']},
         {auth_backends, [rabbit_auth_backend_internal]},
         {delegate_count, 16},
         {trace_vhosts, []},
         {log_levels, [{connection, info}]},
         {ssl_cert_login_from, distinguished_name},
         {ssl_handshake_timeout, 5000},
         {ssl_allow_poodle_attack, false},
         {handshake_timeout, 10000},
         {reverse_dns_lookups, false},
         {cluster_partition_handling, ignore},
         {cluster_keepalive_interval, 10000},
         {tcp_listen_options, [binary,
                               {packet,        raw},
                               {reuseaddr,     true},
                               {backlog,       128},
                               {nodelay,       true},
                               {linger,        {true, 0}},
                               {exit_on_close, false}]},
         {halt_on_upgrade_failure, true},
         {hipe_compile, false},
         %% see bug 24513 for how this list was created
         {hipe_modules,
          [rabbit_reader, rabbit_channel, gen_server2, rabbit_exchange,
           rabbit_command_assembler, rabbit_framing_amqp_0_9_1, rabbit_basic,
           rabbit_event, lists, queue, priority_queue, rabbit_router,
           rabbit_trace, rabbit_misc, rabbit_binary_parser,
           rabbit_exchange_type_direct, rabbit_guid, rabbit_net,
           rabbit_amqqueue_process, rabbit_variable_queue,
           rabbit_binary_generator, rabbit_writer, delegate, gb_sets, lqueue,
           sets, orddict, rabbit_amqqueue, rabbit_limiter, gb_trees,
           rabbit_queue_index, rabbit_exchange_decorator, gen, dict, ordsets,
           file_handle_cache, rabbit_msg_store, array,
           rabbit_msg_store_ets_index, rabbit_msg_file,
           rabbit_exchange_type_fanout, rabbit_exchange_type_topic, mnesia,
           mnesia_lib, rpc, mnesia_tm, qlc, sofs, proplists, credit_flow,
           pmon, ssl_connection, tls_connection, ssl_record, tls_record,
           gen_fsm, ssl]},
         {ssl_apps, [asn1, crypto, public_key, ssl]},
         %% see rabbitmq-server#114
         {mirroring_flow_control, true},
         %% see rabbitmq-server#227 and related tickets.
         %% msg_store_credit_disc_bound only takes effect when
         %% messages are persisted to the message store. If messages
         %% are embedded on the queue index, then modifying this
         %% setting has no effect because credit_flow is not used when
         %% writing to the queue index. See the setting
         %% queue_index_embed_msgs_below above.
         {msg_store_credit_disc_bound, {2000, 500}},
         {msg_store_io_batch_size, 2048},
         %% see rabbitmq-server#143
         {credit_flow_default_credit, {200, 50}}
        ]}]}.