[DOCS] Describe known problem with kafka output (elastic#19259)

# Conflicts: # libbeat/outputs/kafka/docs/kafka.asciidoc
dedemorton · Jun 18, 2020 · 795c118 · 795c118
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diff --git a/libbeat/docs/release-notes/breaking/breaking-7.8.asciidoc b/libbeat/docs/release-notes/breaking/breaking-7.8.asciidoc
@@ -12,7 +12,13 @@
 
 //tag::notable-breaking-changes[]
 [float]
+==== Known problem with Kafka output
 
+The Kafka output fails to connect when using multiple TLS brokers. We advise
+not to upgrade to {beats} 7.8.0 if you're using the Kafka output in this
+configuration.
+
+[float]
 ====  APM Instrumentation
 
 Libbeat includes the Elastic APM Agent for instrumenting the publishing pipeline.

diff --git a/libbeat/outputs/kafka/docs/kafka.asciidoc b/libbeat/outputs/kafka/docs/kafka.asciidoc
@@ -5,7 +5,15 @@
 <titleabbrev>Kafka</titleabbrev>
 ++++
 
-The Kafka output sends the events to Apache Kafka.
+[IMPORTANT]
+.Known problem in version 7.8.0
+====
+The Kafka output fails to connect when using multiple TLS brokers. We advise
+not to upgrade to {beatname_uc} 7.8.0 if you're using the Kafka output in this
+configuration.
+====
+
+The Kafka output sends events to Apache Kafka.
 
 Example configuration: