Configuration error totalSizeCap is smaller than maxFileSize is unnecessary when using compressed archive files issues/1007

Signed-off-by: ceki <ceki@qos.ch>

Author: ceki

logback-classic-blackbox/src/test/resources/asResource/topFile.xml

@@ -0,0 +1,18 @@
+<!--
+  ~ Logback: the reliable, generic, fast and flexible logging framework.
+  ~ Copyright (C) 1999-2026, QOS.ch. All rights reserved.
+  ~
+  ~ This program and the accompanying materials are dual-licensed under
+  ~ either the terms of the Eclipse Public License v2.0 as published by
+  ~ the Eclipse Foundation
+  ~
+  ~   or (per the licensee's choosing)
+  ~
+  ~ under the terms of the GNU Lesser General Public License version 2.1
+  ~ as published by the Free Software Foundation.
+  -->
+
+<configuration xscan="true" scanPeriod="50 millisecond">
+
+    <include resource="asResource/inner1.xml"/>
+</configuration>

logback-core/src/main/java/ch/qos/logback/core/joran/util/ConfigurationWatchListUtil.java

@@ -82,7 +82,7 @@ public static void addToWatchList(Context context, URL url, boolean createCWL) {
             if(createCWL && ConfigurationWatchList.isWatchableProtocol(url)) {
                 cwl = registerNewConfigurationWatchListWithContext(context);
             } else {
-                addWarn(context, "Null ConfigurationWatchList. Cannot add " + url);
+                addInfo(context, "ConfigurationWatchList not initialized due to absence of scan directive. Will not add " + url);
                 return;
             }
         }

logback-core/src/main/java/ch/qos/logback/core/rolling/SizeAndTimeBasedRollingPolicy.java

@@ -18,6 +18,8 @@
 
 public class SizeAndTimeBasedRollingPolicy<E> extends TimeBasedRollingPolicy<E> {
 
+    static long MAX_COMPRESSION_FACTOR = 20;
+
     FileSize maxFileSize;
 
     @Override
@@ -33,10 +35,9 @@ public void start() {
         sizeAndTimeBasedFNATP.setMaxFileSize(maxFileSize);
         timeBasedFileNamingAndTriggeringPolicy = sizeAndTimeBasedFNATP;
 
-        if (!isUnboundedTotalSizeCap() && totalSizeCap.getSize() < maxFileSize.getSize()) {
-            addError("totalSizeCap of [" + totalSizeCap + "] is smaller than maxFileSize [" + maxFileSize
-                    + "] which is non-sensical");
-            return;
+        if (!isUnboundedTotalSizeCap() && totalSizeCap.getSize() < maxFileSize.getSize()/MAX_COMPRESSION_FACTOR) {
+            addWarn("totalSizeCap of [" + totalSizeCap + "] is much smaller than maxFileSize [" + maxFileSize
+                    + "] which is non-sensical, even taking compression into account.");
         }
 
         // most work is done by the parent