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+<?xml version="1.0" encoding="latin1" ?>
+<!DOCTYPE chapter SYSTEM "chapter.dtd">
+
+<chapter>
+ <header>
+ <copyright>
+ <year>2003</year><year>2009</year>
+ <holder>Ericsson AB. All Rights Reserved.</holder>
+ </copyright>
+ <legalnotice>
+ 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.
+
+ </legalnotice>
+
+ <title>Error Logging</title>
+ <prepared></prepared>
+ <docno></docno>
+ <date></date>
+ <rev></rev>
+ <file>error_logging.xml</file>
+ </header>
+
+ <section>
+ <title>Error Information From the Runtime System</title>
+ <p>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):</p>
+ <code type="none"><![CDATA[
+=ERROR REPORT==== 9-Dec-2003::13:25:02 ===
+Error in process <0.27.0> with exit value: {{badmatch,[1,2,3]},[{m,f,1},{shell,eval_loop,2}]}]]></code>
+ <p>The error information is handled by the <em>error logger</em>, a
+ system process registered as <c>error_logger</c>. This process
+ receives all error messages from the Erlang runtime system and
+ also from the standard behaviours and different Erlang/OTP
+ applications.</p>
+ <p>The exit reasons (such as <c>badarg</c> above) used by
+ the runtime system are described in
+ <seealso marker="doc/reference_manual:errors#exit_reasons">Errors and Error Handling</seealso>
+ in the Erlang Reference Manual.</p>
+ <p>The process <c>error_logger</c> and its user interface (with
+ the same name) are described in
+ <seealso marker="kernel:error_logger">error_logger(3)</seealso>.
+ 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 <c>error_logger</c>.</p>
+ </section>
+
+ <section>
+ <title>SASL Error Logging</title>
+ <p>The standard behaviors (<c>supervisor</c>, <c>gen_server</c>,
+ etc.) sends progress and error information to <c>error_logger</c>.
+ If the SASL application is started, this information is written
+ to tty as well. See
+ <seealso marker="sasl:error_logging">SASL Error Logging</seealso>
+ in the SASL User's Guide for further information.</p>
+ <pre>
+% <input>erl -boot start_sasl</input>
+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,&lt;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,&lt;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,&lt;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,&lt;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)
+1> </pre>
+ </section>
+</chapter>
+