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authorHenrik Nord <[email protected]>2011-10-20 14:38:31 +0200
committerHenrik Nord <[email protected]>2011-10-20 14:38:37 +0200
commite21bc712b95b878afd9ab3d93ac27ded0bce7ccf (patch)
tree404f249c13b57209a98c045e428b94c254ff6ca1 /system/doc/design_principles/sup_princ.xml
parent6ef9aef50dbe839098e4330a97247aa21a15ecde (diff)
parent9679510bb27b569fd47394b6cb319916c3282de9 (diff)
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Merge branch 'cf/supervisor_shutdown_infinity'
* cf/supervisor_shutdown_infinity: Add a warning to docs about workers' shutdown strategy Allow an infinite timeout to shutdown worker processes OTP-9648
Diffstat (limited to 'system/doc/design_principles/sup_princ.xml')
-rw-r--r--system/doc/design_principles/sup_princ.xml10
1 files changed, 9 insertions, 1 deletions
diff --git a/system/doc/design_principles/sup_princ.xml b/system/doc/design_principles/sup_princ.xml
index 2748f21bbe..9e7cc2f543 100644
--- a/system/doc/design_principles/sup_princ.xml
+++ b/system/doc/design_principles/sup_princ.xml
@@ -181,8 +181,16 @@ init(...) ->
terminated using <c>exit(Child, kill)</c>.</item>
<item>If the child process is another supervisor, it should be
set to <c>infinity</c> to give the subtree enough time to
- shutdown.</item>
+ shutdown. It is also allowed to set it to <c>infinity</c>, if the
+ child process is a worker.</item>
</list>
+ <warning>
+ <p>Be careful by setting the <c>Shutdown</c> strategy to
+ <c>infinity</c> when the child process is a worker. Because, in this
+ situation, the termination of the supervision tree depends on the
+ child process, it must be implemented in a safe way and its cleanup
+ procedure must always return.</p>
+ </warning>
</item>
<item>
<p><c>Type</c> specifies if the child process is a supervisor or