[LOG4J2-2508] JDBC Appender fails when using both parameter, source, and

literal ColumnMapping elements.

log4j-core/src/main/java/org/apache/logging/log4j/core/appender/db/jdbc/JdbcDatabaseManager.java

@@ -482,15 +482,18 @@ public final class JdbcDatabaseManager extends AbstractDatabaseManager {
         final String simpleName = statement.getClass().getName();
         int i = 1; // JDBC indices start at 1
         for (final ColumnMapping mapping : this.factoryData.columnMappings) {
-            final String source = mapping.getSource();
-            final String key = Strings.isEmpty(source) ? mapping.getName() : source;
-            final Object value = map.getValue(key);
-            if (logger().isTraceEnabled()) {
-                final String valueStr = value instanceof String ? "\"" + value + "\"" : Objects.toString(value, null);
-                logger().trace("{} setObject({}, {}) for key '{}' and mapping '{}'", simpleName, i, valueStr, key,
-                        mapping.getName());
+            if (mapping.getLiteralValue() == null) {
+                final String source = mapping.getSource();
+                final String key = Strings.isEmpty(source) ? mapping.getName() : source;
+                final Object value = map.getValue(key);
+                if (logger().isTraceEnabled()) {
+                    final String valueStr = value instanceof String ? "\"" + value + "\""
+                            : Objects.toString(value, null);
+                    logger().trace("{} setObject({}, {}) for key '{}' and mapping '{}'", simpleName, i, valueStr, key,
+                            mapping.getName());
+                }
+                statement.setObject(i++, value);
             }
-            statement.setObject(i++, value);
         }
     }
 

src/changes/changes.xml

@@ -127,6 +127,9 @@
       <action issue="LOG4J2-2505" dev="ggregory" type="add">
         Let JDBC PoolingDriverConnectionSource with Apache Commons DBCP configure a PoolableConnectionFactory.
       </action>
+      <action issue="LOG4J2-2508" dev="ggregory" type="fix">
+      	JDBC Appender fails when using both parameter, source, and literal ColumnMapping elements.
+      </action>
     </release>
     <release version="2.11.1" date="2018-07-22" description="GA Release 2.11.1">
       <action issue="LOG4J2-2389" dev="rgoers" type="fix" due-to="Liu Wen">