diff --git a/spring-geode-starter-logging/src/main/java/org/springframework/geode/logging/slf4j/logback/StringAppender.java b/spring-geode-starter-logging/src/main/java/org/springframework/geode/logging/slf4j/logback/StringAppender.java
index 0f0d214f..0e2e63b7 100644
--- a/spring-geode-starter-logging/src/main/java/org/springframework/geode/logging/slf4j/logback/StringAppender.java
+++ b/spring-geode-starter-logging/src/main/java/org/springframework/geode/logging/slf4j/logback/StringAppender.java
@@ -44,27 +44,19 @@ public class StringAppender extends AppenderBase<ILoggingEvent> {
 
 	@FunctionalInterface
 	interface StringAppenderWrapper {
+
 		void append(CharSequence charSequence);
+
+		default void clear() { }
+
 	}
 
-	protected static final StringAppenderWrapper stringBuilderAppenderWrapper = new StringAppenderWrapper() {
+	protected static class StringBufferAppenderWrapper implements StringAppenderWrapper {
 
-		private final StringBuilder stringBuilder = new StringBuilder();
-
-		@Override
-		public void append(CharSequence charSequence) {
-			this.stringBuilder.append(charSequence);
-			this.stringBuilder.append(NEWLINE);
+		protected static StringBufferAppenderWrapper create() {
+			return new StringBufferAppenderWrapper();
 		}
 
-		@Override
-		public java.lang.String toString() {
-			return this.stringBuilder.toString();
-		}
-	};
-
-	protected static final StringAppenderWrapper stringBufferAppenderWrapper = new StringAppenderWrapper() {
-
 		private final StringBuffer stringBuffer = new StringBuffer();
 
 		@Override
@@ -73,11 +65,41 @@ public class StringAppender extends AppenderBase<ILoggingEvent> {
 			this.stringBuffer.append(NEWLINE);
 		}
 
+		@Override
+		public void clear() {
+			this.stringBuffer.delete(0, this.stringBuffer.length());
+		}
+
 		@Override
 		public java.lang.String toString() {
 			return this.stringBuffer.toString();
 		}
-	};
+	}
+
+	protected static class StringBuilderAppenderWrapper implements StringAppenderWrapper {
+
+		protected static StringBuilderAppenderWrapper create() {
+			return new StringBuilderAppenderWrapper();
+		}
+
+		private final StringBuilder stringBuilder = new StringBuilder();
+
+		@Override
+		public void append(CharSequence charSequence) {
+			this.stringBuilder.append(charSequence);
+			this.stringBuilder.append(NEWLINE);
+		}
+
+		@Override
+		public void clear() {
+			this.stringBuilder.delete(0, this.stringBuilder.length());
+		}
+
+		@Override
+		public java.lang.String toString() {
+			return this.stringBuilder.toString();
+		}
+	}
 
 	@SuppressWarnings({ "rawtypes", "unchecked", "unused" })
 	public static class Builder {
@@ -148,7 +170,10 @@ public class StringAppender extends AppenderBase<ILoggingEvent> {
 		}
 
 		private StringAppenderWrapper resolveStringAppenderWrapper() {
-			return this.useSynchronization ? stringBufferAppenderWrapper : stringBuilderAppenderWrapper;
+
+			return this.useSynchronization
+				? StringBufferAppenderWrapper.create()
+				: StringBuilderAppenderWrapper.create();
 		}
 
 		public StringAppender build() {
diff --git a/spring-geode-starter-logging/src/test/java/org/springframework/geode/logging/slf4j/logback/StringAppenderUnitTests.java b/spring-geode-starter-logging/src/test/java/org/springframework/geode/logging/slf4j/logback/StringAppenderUnitTests.java
index b4036c50..5c26fd6c 100644
--- a/spring-geode-starter-logging/src/test/java/org/springframework/geode/logging/slf4j/logback/StringAppenderUnitTests.java
+++ b/spring-geode-starter-logging/src/test/java/org/springframework/geode/logging/slf4j/logback/StringAppenderUnitTests.java
@@ -74,7 +74,8 @@ public class StringAppenderUnitTests {
 		assertThat(stringAppender.isStarted()).isFalse();
 		assertThat(stringAppender.getContext()).isEqualTo(LoggerFactory.getILoggerFactory());
 		assertThat(stringAppender.getName()).isEqualTo(StringAppender.DEFAULT_NAME);
-		assertThat(stringAppender.getStringAppenderWrapper()).isSameAs(StringAppender.stringBuilderAppenderWrapper);
+		assertThat(stringAppender.getStringAppenderWrapper())
+			.isInstanceOf(StringAppender.StringBuilderAppenderWrapper.class);
 	}
 
 	@Test
@@ -116,7 +117,8 @@ public class StringAppenderUnitTests {
 		assertThat(stringAppender.isStarted()).isTrue();
 		assertThat(stringAppender.getContext()).isEqualTo(mockContext);
 		assertThat(stringAppender.getName()).isEqualTo("TestStringAppender");
-		assertThat(stringAppender.getStringAppenderWrapper()).isEqualTo(StringAppender.stringBufferAppenderWrapper);
+		assertThat(stringAppender.getStringAppenderWrapper())
+			.isInstanceOf(StringAppender.StringBufferAppenderWrapper.class);
 		assertThat(rootLogger.getAppender("TestStringAppender")).isEqualTo(stringAppender);
 
 		verify(delegate, times(1)).setAppender(isA(CompositeAppender.class));