Index: trunk/src/org/openstreetmap/josm/data/cache/JCSCacheManager.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/cache/JCSCacheManager.java	(revision 15839)
+++ trunk/src/org/openstreetmap/josm/data/cache/JCSCacheManager.java	(revision 15840)
@@ -76,5 +76,13 @@
                         Logging.error(msg);
                     } else if (record.getLevel().intValue() >= Level.WARNING.intValue()) {
-                        Logging.warn(msg);
+                        // Get rid of useless JCS warnings, see #18644
+                        // Pending upstream patch: https://issues.apache.org/jira/projects/JCS/issues/JCS-200
+                        // Pending upstream patch: https://issues.apache.org/jira/projects/JCS/issues/JCS-201
+                        if (msg.equals("No configuration settings found.  Using hardcoded default values for all pools.")
+                                || msg.startsWith("Region") && msg.endsWith("Resetting cache")) { // "Region [TMS_BLOCK_v2] Resetting cache"
+                            Logging.debug(msg);
+                        } else {
+                            Logging.warn(msg);
+                        }
                         // downgrade INFO level to debug, as JCS is too verbose at INFO level
                     } else if (record.getLevel().intValue() >= Level.INFO.intValue()) {