Add a check to current context as contentLength is already in the context

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/zuul/filters/route/support/AbstractRibbonCommand.java

@@ -46,18 +46,20 @@ public abstract class AbstractRibbonCommand<LBC extends AbstractLoadBalancerAwar
 	protected final LBC client;
 	protected RibbonCommandContext context;
 
-	public AbstractRibbonCommand(LBC client, RibbonCommandContext context, ZuulProperties zuulProperties) {
+	public AbstractRibbonCommand(LBC client, RibbonCommandContext context,
+			ZuulProperties zuulProperties) {
 		this("default", client, context, zuulProperties);
 	}
 
-
-	public AbstractRibbonCommand(String commandKey, LBC client, RibbonCommandContext context, ZuulProperties zuulProperties) {
+	public AbstractRibbonCommand(String commandKey, LBC client,
+			RibbonCommandContext context, ZuulProperties zuulProperties) {
 		super(getSetter(commandKey, zuulProperties));
 		this.client = client;
 		this.context = context;
 	}
 
-	protected static Setter getSetter(final String commandKey, ZuulProperties zuulProperties) {
+	protected static Setter getSetter(final String commandKey,
+			ZuulProperties zuulProperties) {
 
 		// @formatter:off
 		final HystrixCommandProperties.Setter setter = HystrixCommandProperties.Setter()
@@ -82,10 +84,12 @@ public abstract class AbstractRibbonCommand<LBC extends AbstractLoadBalancerAwar
 	@Override
 	protected ClientHttpResponse run() throws Exception {
 		final RequestContext context = RequestContext.getCurrentContext();
+		if (context.getRequest() != null) {
 			String contentLengthHeader = context.getRequest().getHeader("Content-Length");
 			if (StringUtils.hasText(contentLengthHeader)) {
 				this.context.setContentLength(new Long(contentLengthHeader));
 			}
+		}
 
 		RQ request = createRequest();
 		RS response = this.client.executeWithLoadBalancer(request);