MINOR: add UPGRADE_FROM to config docs
Reviewers: Guozhang Wang
<td colspan="2">Timestamp extractor class that implements the <code class="docutils literal"><span class="pre">TimestampExtractor</span></code> interface.</td>
<td>See <a class="reference internal" href="#streams-developer-guide-timestamp-extractor"><span class="std std-ref">Timestamp Extractor</span></a></td>
</tr>
+ <tr class="row-odd"><td>upgrade.from</td>
+ <td>Medium</td>
+ <td colspan="2">The version you are upgrading from during a rolling upgrade.</td>
+ <td>See <a class="reference internal" href="#streams-developer-guide-upgrade-from"><span class="std std-ref">Upgrade From</span></a></td>
+ </tr>
<tr class="row-even"><td>value.serde</td>
<td>Medium</td>
<td colspan="2">Default serializer/deserializer class for record values, implements the <code class="docutils literal"><span class="pre">Serde</span></code> interface (see also key.serde).</td>
</div>
</div></blockquote>
</div>
+ <div class="section" id="upgrade-from">
+ <h4><a class="toc-backref" href="#id14">upgrade.from</a><a class="headerlink" href="#upgrade-from" title="Permalink to this headline"></a></h4>
+ <blockquote>
+ <div>
+ The version you are upgrading from. It is important to set this config when performing a rolling upgrade to certain versions, as described in the upgrade guide.
+ You should set this config to the appropriate version before bouncing your instances and upgrading them to the newer version. Once everyone is on the
+ newer version, you should remove this config and do a second rolling bounce. It is only necessary to set this config and follow the two-bounce upgrade path
+ when upgrading from below version 2.0, or when upgrading to 2.4+ from any version lower than 2.4.
+ </div>
+ </blockquote>
+ </div>
</div>
<div class="section" id="kafka-consumers-and-producer-configuration-parameters">
<h3><a class="toc-backref" href="#id16">Kafka consumers, producer and admin client configuration parameters</a><a class="headerlink" href="#kafka-consumers-and-producer-configuration-parameters" title="Permalink to this headline"></a></h3>
