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-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