Index: modules/http/http_filters.c
===================================================================
--- modules/http/http_filters.c	(revision 601660)
+++ modules/http/http_filters.c	(working copy)
@@ -243,6 +243,7 @@
             if (block == APR_NONBLOCK_READ &&
                 ( (rv == APR_SUCCESS && APR_BRIGADE_EMPTY(bb)) ||
                   (APR_STATUS_IS_EAGAIN(rv)) )) {
+                ctx->state = BODY_CHUNK_PART;
                 return APR_EAGAIN;
             }