[kafka] branch 2.1 updated: MINOR: add upgrade note for KIP-336

[li...@apache.org]

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lindong pushed a commit to branch 2.1
in repository https://gitbox.apache.org/repos/asf/kafka.git


The following commit(s) were added to refs/heads/2.1 by this push:
     new 9ae24a2  MINOR: add upgrade note for KIP-336
9ae24a2 is described below

commit 9ae24a2ab55eb71c0b0ee6b5d4b29d1193368244
Author: Viktor Somogyi <vi...@gmail.com>
AuthorDate: Thu Oct 25 09:43:39 2018 -0700

    MINOR: add upgrade note for KIP-336
    
    Author: Viktor Somogyi <vi...@gmail.com>
    
    Reviewers: Ismael Juma <is...@juma.me.uk>, Andras Katona <41...@users.noreply.github.com>, Dong Lin <li...@gmail.com>
    
    Closes #5685 from viktorsomogyi/upgrade-notes-for-serializer-consolidation
    
    (cherry picked from commit 262bb006d58f96e3e24cab552506561310ebfb5d)
    Signed-off-by: Dong Lin <li...@gmail.com>
---
 docs/upgrade.html | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/upgrade.html b/docs/upgrade.html
index f879ae3..41e2277 100644
--- a/docs/upgrade.html
+++ b/docs/upgrade.html
@@ -39,6 +39,10 @@
         you will instead need to override <code>delivery.timeout.ms</code>.</li>
     <li>The <code>ListGroup</code> API now expects, as a recommended alternative, <code>Describe Group</code> access to the groups a user should be able to list.
         Even though the old <code>Describe Cluster</code> access is still supported for backward compatibility, using it for this API is not advised.</li>
+    <li><a href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=87298242">KIP-336</a> deprecates the ExtendedSerializer and ExtendedDeserializer interfaces and
+        propagates the usage of Serializer and Deserializer. ExtendedSerializer and ExtendedDeserializer were introduced with
+        <a href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-82+-+Add+Record+Headers">KIP-82</a> to provide record headers for serializers and deserializers
+        in a Java 7 compatible fashion. Now we consolidated these interfaces as Java 7 support has been dropped since.</li>
 </ol>
 
 <h5><a id="upgrade_210_notable" href="#upgrade_210_notable">Notable changes in 2.1.0</a></h5>