From 0e328bf930d4f7e39a8901c8960275eb28c35ff2 Mon Sep 17 00:00:00 2001
From: Archit Goyal <argoyal+01@linkedin.com>
Date: Tue, 25 Aug 2026 22:50:19 -0700
Subject: [PATCH] Log effective HistoryServer configuration at startup

Adds storage type, load mode, and retention settings to the startup log.
---
 .../runtime/webmonitor/history/HistoryServer.java   | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/history/HistoryServer.java b/flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/history/HistoryServer.java
index 151fd43b8233f3..5f993d7ba8d895 100644
--- a/flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/history/HistoryServer.java
+++ b/flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/history/HistoryServer.java
@@ -261,6 +261,19 @@ public HistoryServer(
         archiveLoadMode = config.get(HistoryServerOptions.HISTORY_SERVER_ARCHIVE_LOAD_MODE);
         HistoryServerOptions.HistoryServerArchiveStorageType archiveStorageType =
                 config.get(HistoryServerOptions.HISTORY_SERVER_ARCHIVE_STORAGE_TYPE);
+        LOG.info(
+                "HistoryServer effective configuration: storage-type={}, load-mode={}, "
+                        + "retained-jobs={}, retained-applications={}, retained-ttl={}, "
+                        + "clean-expired-jobs={}, clean-expired-applications={}.",
+                archiveStorageType,
+                archiveLoadMode,
+                config.get(HistoryServerOptions.HISTORY_SERVER_RETAINED_JOBS),
+                config.get(HistoryServerOptions.HISTORY_SERVER_RETAINED_APPLICATIONS),
+                config.getOptional(HistoryServerOptions.HISTORY_SERVER_RETAINED_TTL)
+                        .map(Object::toString)
+                        .orElse("unset"),
+                cleanupExpiredJobs,
+                cleanupExpiredApplications);
         AbstractHistoryServerHandler.HistoryServerHandlerFactory historyServerHandlerFactory;
         switch (archiveStorageType) {
             case FILE: