[receiver/kafka] Use proper context for shutdown

.chloggen/kafka-receiver-context-fix.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: 'bug_fix'
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: receiver/kafka
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix issue where shutdown could hang indefinitely.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [30789]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

receiver/kafkareceiver/kafka_receiver.go

@@ -157,9 +157,8 @@ func createKafkaClient(config Config) (sarama.ConsumerGroup, error) {
 	return sarama.NewConsumerGroup(config.Brokers, config.GroupID, saramaConfig)
 }
 
-func (c *kafkaTracesConsumer) Start(_ context.Context, host component.Host) error {
-	ctx, cancel := context.WithCancel(context.Background())
-	c.cancelConsumeLoop = cancel
+func (c *kafkaTracesConsumer) Start(ctx context.Context, host component.Host) error {
+	ctx, c.cancelConsumeLoop = context.WithCancel(ctx)
 	obsrecv, err := receiverhelper.NewObsReport(receiverhelper.ObsReportSettings{
 		ReceiverID:             c.settings.ID,
 		Transport:              transport,