Github user satishd commented on a diff in the pull request:
https://github.com/apache/storm/pull/2019#discussion_r106795850
--- Diff: docs/Joins.md ---
@@ -122,4 +122,18 @@ is treated as a single stream and joined against
`stream2` from `bolt3`.
2. Duplication of joined records across windows is possible when using
Sliding Windows. This is because the tuples continue to exist
across multiple windows when using Sliding Windows.
-
+3. If message timeouts are enabled, ensure the timeout setting
(topology.message.timeout.secs) is large enough to comfortably
+ accommodate the window size, plus the additional processing by other
spouts and bolts.
+
+4. Joining a window of two streams with M and N elements each, *in the
worst case*, can produce MxN elements with every output tuple
--- End diff --
Nice to see this case added in the doc here.
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