Make error message actionable (#18667)

* Make error message actionable * Adding CHANGELOG entry
elastic · May 21, 2020 · 34af60d · 34af60d
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commit 34af60d
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diff --git a/CHANGELOG.next.asciidoc b/CHANGELOG.next.asciidoc
@@ -16,6 +16,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Remove `AddDockerMetadata` and `AddKubernetesMetadata` processors from the `script` processor. They can still be used as normal processors in the configuration. {issue}16349[16349] {pull}16514[16514]
 - Introduce APM libbeat instrumentation, active when running the beat with ELASTIC_APM_ACTIVE=true. {pull}17938[17938]
 - Remove the non-ECS `agent.hostname` field. Use the `agent.name` or `agent.id` fields for an identifier. {issue}16377[16377] {pull}18328[18328]
+- Make error message about locked data path actionable. {pull}18667[18667]
 
 *Auditbeat*
 

diff --git a/libbeat/cmd/instance/locker.go b/libbeat/cmd/instance/locker.go
@@ -30,7 +30,7 @@ var (
 	// ErrAlreadyLocked is returned when a lock on the data path is attempted but
 	// unsuccessful because another Beat instance already has the lock on the same
 	// data path.
-	ErrAlreadyLocked = errors.New("data path already locked by another beat")
+	ErrAlreadyLocked = errors.New("data path already locked by another beat. Please make sure that multiple beats are not sharing the same data path (path.data).")
 )
 
 type locker struct {