Enterprise 1.9.7 release notes (#4007)

* added not under flux updates

* updates based on feedback

* changed release notes date

* added requested update

content/enterprise_influxdb/v1.9/about-the-project/release-notes-changelog.md

@@ -9,6 +9,31 @@ menu:
     parent: About the project
 ---
 
+## 1.9.7 [2022-05-11]
+
+### Features
+- Add experimental passive node feature; expose passive node feature to influxd-ctl and the API.
+- Throttle inter-node data replication, both incoming writes and hinted hand-off, when errors are encountered.
+
+#### Flux updates
+- Add [http requests package](/{{< latest "flux" >}}/stdlib/experimental/http/requests/).
+- Add [isType()](/{{< latest "flux" >}}/stdlib/types/istype/) function.
+- Add [display()](/{{< latest "flux" >}}/stdlib/universe/display/) function.
+- Enhancements to the following functions: [increase()](/{{< latest "flux" >}}/stdlib/universe/increase/), [sort()](/{{< latest "flux" >}}/stdlib/universe/sort/), [derivative()](/{{< latest "flux" >}}/stdlib/universe/derivative/), [union()](/{{< latest "flux" >}}/stdlib/universe/union/), [timeShift()](/{{< latest "flux" >}}/stdlib/universe/timeshift/), vectorization to applicable functions such as [map()](/{{< latest "flux" >}}/stdlib/universe/map/).
+- Add TCP connection pooling to [mqtt.publish()](/{{< latest "flux" >}}/stdlib/experimental/mqtt/publish/) function when called in a map() function.
+
+### Bug fixes
+- Fix race condition causing `influxd-ctl restore` command to fail.
+#### Error Messaging
+- Improve error messaging for `max series per database exceeded`error.
+- Improve influxd-ctl error messages when invalid JSON is received.
+- Add detail to `error creating subscription` message.
+- `DROP SHARD` now successfully ignores "shard not found" errors.
+
+### Maintenance updates
+- Upgrade to Go 1.17.9
+- Update to [Flux v0.161.0](/flux/v0.x/release-notes/#v01610-2022-03-24).
+
 ## 1.9.6 [2022-02-16]
 
 {{% note %}} InfluxDB Enterprise offerings are no longer available on AWS, Azure, and GCP marketplaces. Please [contact Sales](https://www.influxdata.com/contact-sales/) to request an license key to [install InfluxDB Enterprise in your own environment](/enterprise_influxdb/v1.9/introduction/installation/).
@@ -39,7 +64,6 @@ menu:
 #### Data
 
 -  Adjust shard start and end times to avoid overlaps in existing shards. This resolves issues with existing shards (truncated or not) that have a different shard duration than the current default.
-- `DROP SHARD` now successfully ignores "shard not found errors."
 
 #### Errors