[4.1] f609870 Pass delivery abandoned does not qualify as an error

[PÃ¥l Hermunn Johansen]

commit f609870a12d7104da250c78236bfdcd0dda306af
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Fri Oct 6 12:58:24 2017 +0200

    Pass delivery abandoned does not qualify as an error
    
    ... so log it under the Debug tag.
    
    FetchErrors should be actual errors which can be addressed. In this case,
    nothing is wrong in any way, the fact that we abort a fetch if we don't
    need the body is a varnish internal optimization (which makes sense, but
    comes at the cost of closing a connection).
    
    Merges #2450
    
    Conflicts:
    	bin/varnishd/cache/cache_fetch.c

diff --git a/bin/varnishd/cache/cache_fetch.c b/bin/varnishd/cache/cache_fetch.c
index 902ad17..eb3d58e 100644
--- a/bin/varnishd/cache/cache_fetch.c
+++ b/bin/varnishd/cache/cache_fetch.c
@@ -495,8 +495,8 @@ vbf_fetch_body_helper(struct busyobj *bo)
 			 * objects to be created.
 			 */
 			AN(vfc->oc->flags & OC_F_PASS);
-			VSLb(vfc->wrk->vsl, SLT_FetchError,
-			    "Pass delivery abandoned");
+			VSLb(vfc->wrk->vsl, SLT_Debug,
+			    "Fetch: Pass delivery abandoned");
 			vfps = VFP_END;
 			bo->htc->doclose = SC_RX_BODY;
 			break;
diff --git a/doc/changes.rst b/doc/changes.rst
index e276414..663f91f 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -21,6 +21,7 @@ Bugs fixed
 
 * 1772_ - Honor first_byte_timeout for recycled backend connections
 * 2135_ - Limit Backend Connection retries to a single retry
+* 2450_ - Pass delivery abandoned does not qualify as an error
 * 2495_ - Avoid leaking an OH ref on reembark failure
 * 2502_ - objcore reference count leak
 * 2530_ - Varnish shouldn't test gunzip for range responses
@@ -29,6 +30,7 @@ Bugs fixed
 
 .. _1772: https://github.com/varnishcache/varnish-cache/issues/1772
 .. _2135: https://github.com/varnishcache/varnish-cache/pull/2135
+.. _2450: https://github.com/varnishcache/varnish-cache/pull/2450
 .. _2495: https://github.com/varnishcache/varnish-cache/issues/2495
 .. _2502: https://github.com/varnishcache/varnish-cache/issues/2502
 .. _2530: https://github.com/varnishcache/varnish-cache/issues/2530