Apache Pinot Daily Email Digest (2020-06-12)

[Pinot Slack Email Digest <sn...@apache.org>]

<h3><u>#general</u></h3><br><strong>@pinot_digest: </strong>@pinot_digest has joined the channel<br><strong>@hirokinoado174: </strong>@hirokinoado174 has joined the channel<br><strong>@ssubrama: </strong>@yupeng this has to do with an incompatbility between the broker and server for specific types of queries. Assuming you upgrade in the order controller, broker, server, then before upgrading server (but after upgrading broker) you will get errors if these type of queries are issued to the broker. The types of queries are selection with order by i believe, but @jackie.jxt can provide specific examples.<br><strong>@yupeng: </strong>hey, folks, regarding this note in the 0.2.0 <https://u17000708.ct.sendgrid.net/ls/click?upn=1BiFF0-2FtVRazUn1cLzaiMdTeAXadp8BL3QinSdRtJdr9CaclHyIO-2FVyf794BME0LaSd1OfJcXp6mRB6-2BxMqtxg-3D-3D3F0w_vGLQYiKGfBLXsUt3KGBrxeq6BCTMpPOLROqAvDqBeTyQm8T7ldtgOuKBeaOYr8jYNbN-2FxU4LOHXUSgR5WgVLC9jrzEMvbtG-2BKHxH3e8SP65175wWBBMEGnidsIURHwNvCdz5OXG3fuQpjc1nrCQVeQuBRwECR-2Fhkk9MJ07pq4DPpELYxbPS8fmDCvcgWpUWIkeS52r3zy8zJJvd52Ob27f3SXeDhR4UYhfekero1BwA-3D notes>, can someone clarify why it’s required to upgrade to 0.2.0 before moving to newer versions? some pointer to the related PRs would be even better
```You must upgrade to this release before moving onto newer versions of Pinot
release. The protocol between Pinot-broker and Pinot-server has been changed
and this release has the code to retain compatibility moving forward.
Skipping this release may (depending on your environment) cause query errors
if brokers are upgraded and servers are in the process of being upgraded. ```<br>