Handle exception when ByteBuf is converted to String

Author: mlichtblau

spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferLimitException.java

@@ -35,4 +35,8 @@ public DataBufferLimitException(String message) {
 		super(message);
 	}
 
+	public DataBufferLimitException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
 }

spring-core/src/main/java/org/springframework/core/io/buffer/NettyDataBuffer.java

@@ -374,7 +374,12 @@ public int hashCode() {
 
 	@Override
 	public String toString() {
-		return this.byteBuf.toString();
+		try {
+			return this.byteBuf.toString();
+		}
+		catch (OutOfMemoryError ex) {
+			throw new DataBufferLimitException("Failed to convert data buffer to string: " + ex.getMessage(), ex);
+		}
 	}