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-rw-r--r--lib/stdlib/doc/src/supervisor.xml12
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/stdlib/doc/src/supervisor.xml b/lib/stdlib/doc/src/supervisor.xml
index 6d5065ca02..0e8075a578 100644
--- a/lib/stdlib/doc/src/supervisor.xml
+++ b/lib/stdlib/doc/src/supervisor.xml
@@ -208,8 +208,16 @@ child_spec() = #{id => child_id(), % mandatory
the child process is unconditionally terminated using
<c>exit(Child,kill)</c>.</p>
<p>If the child process is another supervisor, the shutdown time
- is to be set to <c>infinity</c> to give the subtree ample
- time to shut down. It is also allowed to set it to <c>infinity</c>,
+ must be set to <c>infinity</c> to give the subtree ample
+ time to shut down.</p>
+ <warning>
+ <p>Setting the shutdown time to anything other
+ than <c>infinity</c> for a child of type <c>supervisor</c>
+ can cause a race condition where the child in question
+ unlinks its own children, but fails to terminate them
+ before it is killed.</p>
+ </warning>
+ <p>It is also allowed to set it to <c>infinity</c>,
if the child process is a worker.</p>
<warning>
<p>Be careful when setting the shutdown time to