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authorSiri Hansen <[email protected]>2018-05-17 18:19:57 +0200
committerSiri Hansen <[email protected]>2018-05-23 11:10:55 +0200
commita9a6b803a60793d42a74e0f1693a7594dffb6bc3 (patch)
tree4e70433732de9c0dee413678a8ce1d61b22941a0 /system/doc/system_principles/error_logging.xml
parent8aa64c90ddd20ec0ca8cc5fe92a6124324c51da5 (diff)
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Improve documentation of logger and error_logger
Diffstat (limited to 'system/doc/system_principles/error_logging.xml')
-rw-r--r--system/doc/system_principles/error_logging.xml113
1 files changed, 51 insertions, 62 deletions
diff --git a/system/doc/system_principles/error_logging.xml b/system/doc/system_principles/error_logging.xml
index c99d59ddb7..ee3d68d80e 100644
--- a/system/doc/system_principles/error_logging.xml
+++ b/system/doc/system_principles/error_logging.xml
@@ -39,80 +39,69 @@
<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 as
- well as from the standard behaviours and different Erlang/OTP
- applications.</p>
+ <p>The error information is handled by Logger, which is part of
+ the Kernel application.</p>
<p>The exit reasons (such as <c>badarg</c>) used by
the runtime system are described in
<seealso marker="doc/reference_manual:errors#exit_reasons">
Errors and Error Handling</seealso>.</p>
- <p>For information about the process <c>error_logger</c> and its user
- interface (with the same name), see the
- <seealso marker="kernel:error_logger">error_logger(3)</seealso>
- manual page in Kernel. The system can be configured so that
- error information
- is written to file or to tty, or both. In addition, user-defined
- applications can send and format error information using
- <c>error_logger</c>.</p>
+ <p>For information about Logger and its user
+ interface, see the
+ <seealso marker="kernel:logger">logger(3)</seealso>
+ manual page and
+ the <seealso marker="kernel:logger_chapter">Logging</seealso>
+ section in the Kernel User's Guide. The system can be configured so that
+ log events are
+ written to file or to tty, or both. In addition, user-defined
+ applications can send and format log events using
+ Logger.</p>
</section>
<section>
- <title>SASL Error Logging</title>
+ <title>Log events from OTP behaviours</title>
<p>The standard behaviours (<c>supervisor</c>, <c>gen_server</c>,
- and so on) send progress and error information to <c>error_logger</c>.
- If the SASL application is started, this information is
- written to tty as well. For more information, see
+ and so on) send progress and error information to
+ Logger. Progress reports are by default not logged, but can be
+ enabled by setting the Kernel configuration
+ parameter <c>logger_log_progress</c> to true. Supervisor
+ reports, crash reports and other error and information reports
+ are by default logged through the log handler which is
+ set up when the Kernel application is started.</p>
+ <p>Prior to OTP-21, supervisor, crash, and progress reports were
+ only logged when the SASL application was running. This
+ behaviour can, for backwards compatibility, be enabled by
+ setting the Kernel configuration
+ parameter <c>logger_sasl_compatible</c> to <c>true</c>. For more
+ information, see
<seealso marker="sasl:error_logging">SASL Error Logging</seealso>
in the SASL User's Guide.</p>
<pre>
-% <input>erl -boot start_sasl</input>
-Erlang (BEAM) emulator version 5.4.13 [hipe] [threads:0] [kernel-poll]
+% <input>erl -kernel logger_log_progress true</input>
+Erlang/OTP 21 [erts-10.0] [source-76388a1] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]
-
-=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)
+=PROGRESS REPORT==== 18-May-2018::21:33:41.705292 ===
+ application: kernel
+ started_at: nonode@nohost
+=PROGRESS REPORT==== 18-May-2018::21:33:41.708900 ===
+ application: stdlib
+ started_at: nonode@nohost
+=PROGRESS REPORT==== 18-May-2018::21:33:41.726003 ===
+ supervisor: {local,kernel_safe_sup}
+ started: [{pid,&lt;0.75.0>},
+ {id,disk_log_sup},
+ {mfargs,{disk_log_sup,start_link,[]}},
+ {restart_type,permanent},
+ {shutdown,1000},
+ {child_type,supervisor}]
+=PROGRESS REPORT==== 18-May-2018::21:33:41.726348 ===
+ supervisor: {local,kernel_safe_sup}
+ started: [{pid,&lt;0.76.0>},
+ {id,disk_log_server},
+ {mfargs,{disk_log_server,start_link,[]}},
+ {restart_type,permanent},
+ {shutdown,2000},
+ {child_type,worker}]
+Eshell V9.3.1 (abort with ^G)
1> </pre>
</section>
</chapter>