From 854c5e447c2019efc6d2f8bb061f8a73671d33c2 Mon Sep 17 00:00:00 2001
From: milanmajchrak <milan.majchrak@dataquest.sk>
Date: Tue, 17 Mar 2026 16:46:18 +0100
Subject: [PATCH] Add warn.log appender (A4) with gzip rotation

Added A4 appender for warn.log with daily gzip rotation to match
configuration from other customer branches. Added AppenderRef at
WARN level to DSpace logger and Root.
---
 dspace/config/log4j2.xml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/dspace/config/log4j2.xml b/dspace/config/log4j2.xml
index b15085af6e6..d5939ae2491 100644
--- a/dspace/config/log4j2.xml
+++ b/dspace/config/log4j2.xml
@@ -48,6 +48,21 @@
                 <policy type='TimeBasedTriggeringPolicy'>yyyy-MM-dd</policy>
             </policies>
         </Appender>
+
+        <!-- A4 is for Warns and errors -->
+        <Appender name='A4'
+                  filePattern="${log.dir}/warn.log-%d{yyyy-MM-dd}.gz"
+                  type='RollingFile'
+                  fileName='${log.dir}/warn.log'
+        >
+            <!-- NOTE: The %equals patterns are providing a default value of "unknown" if "correlationID" or
+                 "requestID" are not currently set in the ThreadContext. -->
+            <Layout type='PatternLayout'
+                    pattern='%d %-5p %equals{%X{correlationID}}{}{unknown} %equals{%X{requestID}}{}{unknown} %c @ %m%n'/>
+            <policies>
+                <policy type='TimeBasedTriggeringPolicy'>yyyy-MM-dd</policy>
+            </policies>
+        </Appender>
     </Appenders>
 
     <Loggers>
@@ -57,6 +72,7 @@
                 level='${loglevel.dspace}'
                 additivity='false'>
             <AppenderRef ref='A1'/>
+            <AppenderRef ref="A4" level="WARN"/>
         </Logger>
 
         <!-- The checksum checker -->
@@ -91,6 +107,7 @@
         <!-- Anything not a part of DSpace -->
         <Root level='${loglevel.other}'>
             <AppenderRef ref='A1'/>
+            <AppenderRef ref="A4" level="WARN"/>
         </Root>
     </Loggers>
 </Configuration>