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authorMagnus Henoch <[email protected]>2016-11-21 11:48:54 +0000
committerMagnus Henoch <[email protected]>2016-11-21 11:48:54 +0000
commit5b9265ad19d6596a8b599eccc64accb67e3c664e (patch)
treefb0187d4333af4f7b1ee5c0ff75c86ec2047cd94 /lib/kernel
parent4683b5c227a238ee27f658bdfe2981c4b69acf09 (diff)
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Remove vestiges of watchdog support in heart
Hardware watchdog support was removed from heart in R13A, but there were still some vestiges in the code and the documentation. - Remove mentions of the HW_WD_DISABLE variable, as it's no longer used. - Remove the HEART_BEAT_BOOT_DELAY variable, as it was only used for the hardware watchdog.
Diffstat (limited to 'lib/kernel')
-rw-r--r--lib/kernel/doc/src/heart.xml17
-rw-r--r--lib/kernel/src/heart.erl15
2 files changed, 10 insertions, 22 deletions
diff --git a/lib/kernel/doc/src/heart.xml b/lib/kernel/doc/src/heart.xml
index 59a046bf4d..5b5b71e521 100644
--- a/lib/kernel/doc/src/heart.xml
+++ b/lib/kernel/doc/src/heart.xml
@@ -37,10 +37,7 @@
the <c>heart</c> port program is to check that the Erlang runtime system
it is supervising is still running. If the port program has not
received any heartbeats within <c>HEART_BEAT_TIMEOUT</c> seconds
- (defaults to 60 seconds), the system can be rebooted. Also, if
- the system is equipped with a hardware watchdog timer and is
- running Solaris, the watchdog can be used to supervise the entire
- system.</p>
+ (defaults to 60 seconds), the system can be rebooted.</p>
<p>An Erlang runtime system to be monitored by a heart program
is to be started with command-line flag <c>-heart</c> (see
also <seealso marker="erts:erl"><c>erl(1)</c></seealso>).
@@ -51,17 +48,13 @@
or a terminated Erlang runtime system, environment variable
<c>HEART_COMMAND</c> must be set before the system is started.
If this variable is not set, a warning text is printed but
- the system does not reboot. However, if the hardware watchdog is
- used, it still triggers a reboot <c>HEART_BEAT_BOOT_DELAY</c>
- seconds later (defaults to 60 seconds).</p>
+ the system does not reboot.</p>
<p>To reboot on Windows, <c>HEART_COMMAND</c> can be
set to <c>heart -shutdown</c> (included in the Erlang delivery)
or to any other suitable program that can activate a reboot.</p>
- <p>The hardware watchdog is not started under Solaris if
- environment variable <c>HW_WD_DISABLE</c> is set.</p>
- <p>The environment variables <c>HEART_BEAT_TIMEOUT</c> and
- <c>HEART_BEAT_BOOT_DELAY</c> can be used to configure the heart
- time-outs; they can be set in the operating system shell before Erlang
+ <p>The environment variable <c>HEART_BEAT_TIMEOUT</c>
+ can be used to configure the heart
+ time-outs; it can be set in the operating system shell before Erlang
is started or be specified at the command line:</p>
<pre>
% <input>erl -heart -env HEART_BEAT_TIMEOUT 30 ...</input></pre>
diff --git a/lib/kernel/src/heart.erl b/lib/kernel/src/heart.erl
index eea78aabdf..8fa48d56fb 100644
--- a/lib/kernel/src/heart.erl
+++ b/lib/kernel/src/heart.erl
@@ -198,16 +198,11 @@ start_portprogram() ->
end.
get_heart_timeouts() ->
- HeartOpts = case os:getenv("HEART_BEAT_TIMEOUT") of
- false -> "";
- H when is_list(H) ->
- "-ht " ++ H
- end,
- HeartOpts ++ case os:getenv("HEART_BEAT_BOOT_DELAY") of
- false -> "";
- W when is_list(W) ->
- " -wt " ++ W
- end.
+ case os:getenv("HEART_BEAT_TIMEOUT") of
+ false -> "";
+ H when is_list(H) ->
+ "-ht " ++ H
+ end.
check_start_heart() ->
case init:get_argument(heart) of