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-rw-r--r--docs/monitoring.md7
1 files changed, 4 insertions, 3 deletions
diff --git a/docs/monitoring.md b/docs/monitoring.md
index fa6c899a40..ee932cfc6d 100644
--- a/docs/monitoring.md
+++ b/docs/monitoring.md
@@ -225,9 +225,10 @@ for the history server, they would typically be accessible at `http://<server-ur
for a running application, at `http://localhost:4040/api/v1`.
In the API, an application is referenced by its application ID, `[app-id]`.
-When running on YARN, each application may have multiple attempts; each identified by their `[attempt-id]`.
-In the API listed below, `[app-id]` will actually be `[base-app-id]/[attempt-id]`,
-where `[base-app-id]` is the YARN application ID.
+When running on YARN, each application may have multiple attempts, but there are attempt IDs
+only for applications in cluster mode, not applications in client mode. Applications in YARN cluster mode
+can be identified by their `[attempt-id]`. In the API listed below, when running in YARN cluster mode,
+`[app-id]` will actually be `[base-app-id]/[attempt-id]`, where `[base-app-id]` is the YARN application ID.
<table class="table">
<tr><th>Endpoint</th><th>Meaning</th></tr>