20032009 Ericsson AB. All Rights Reserved. The contents of this file are subject to the Erlang Public License, Version 1.1, (the "License"); you may not use this file except in compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Error Logging error_logging.xml
Error Information From the Runtime System

Error information from the runtime system, that is, information about a process terminating due to an uncaught error exception, is by default written to terminal (tty):

with exit value: {{badmatch,[1,2,3]},[{m,f,1},{shell,eval_loop,2}]}]]>

The error information is handled by the error logger, a system process registered as error_logger. This process receives all error messages from the Erlang runtime system and also from the standard behaviours and different Erlang/OTP applications.

The exit reasons (such as badarg above) used by the runtime system are described in Errors and Error Handling in the Erlang Reference Manual.

The process error_logger and its user interface (with the same name) are described in error_logger(3). It is possible to configure the system so that error information is written to file instead/as well as tty. Also, it is possible for user defined applications to send and format error information using error_logger.

SASL Error Logging

The standard behaviors (supervisor, gen_server, etc.) sends progress and error information to error_logger. If the SASL application is started, this information is written to tty as well. See SASL Error Logging in the SASL User's Guide for further information.

% erl -boot start_sasl
Erlang (BEAM) emulator version 5.4.13 [hipe] [threads:0] [kernel-poll]


=PROGRESS REPORT==== 31-Mar-2006::12:45:58 ===
          supervisor: {local,sasl_safe_sup}
             started: [{pid,<0.33.0>},
                       {name,alarm_handler},
                       {mfa,{alarm_handler,start_link,[]}},
                       {restart_type,permanent},
                       {shutdown,2000},
                       {child_type,worker}]

=PROGRESS REPORT==== 31-Mar-2006::12:45:58 ===
          supervisor: {local,sasl_safe_sup}
             started: [{pid,<0.34.0>},
                       {name,overload},
                       {mfa,{overload,start_link,[]}},
                       {restart_type,permanent},
                       {shutdown,2000},
                       {child_type,worker}]

=PROGRESS REPORT==== 31-Mar-2006::12:45:58 ===
          supervisor: {local,sasl_sup}
             started: [{pid,<0.32.0>},
                       {name,sasl_safe_sup},
                       {mfa,{supervisor,
                                start_link,
                                [{local,sasl_safe_sup},sasl,safe]}},
                       {restart_type,permanent},
                       {shutdown,infinity},
                       {child_type,supervisor}]

=PROGRESS REPORT==== 31-Mar-2006::12:45:58 ===
          supervisor: {local,sasl_sup}
             started: [{pid,<0.35.0>},
                       {name,release_handler},
                       {mfa,{release_handler,start_link,[]}},
                       {restart_type,permanent},
                       {shutdown,2000},
                       {child_type,worker}]

=PROGRESS REPORT==== 31-Mar-2006::12:45:58 ===
         application: sasl
          started_at: nonode@nohost
Eshell V5.4.13  (abort with ^G)
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