[master] fe85c10 Handle the case where too many retries are attempted, by returning a 503 reply.
Poul-Henning Kamp
phk at FreeBSD.org
Fri Jan 17 11:58:26 CET 2014
commit fe85c10c5d2c85a3f8efcfc41d4f57c539cae2d9
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date: Fri Jan 17 10:57:56 2014 +0000
Handle the case where too many retries are attempted, by returning
a 503 reply.
Fixes #1401
diff --git a/bin/varnishd/cache/cache_fetch.c b/bin/varnishd/cache/cache_fetch.c
index afc3cce..f461fa5 100644
--- a/bin/varnishd/cache/cache_fetch.c
+++ b/bin/varnishd/cache/cache_fetch.c
@@ -244,6 +244,8 @@ vbf_stp_fetchhdr(struct worker *wrk, struct busyobj *bo)
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, bo->beresp->ws);
if (wrk->handling == VCL_RET_RETRY) {
+ if (bo->vbc)
+ VDI_CloseFd(&bo->vbc);
bo->retries++;
if (bo->retries <= cache_param->max_retries) {
// XXX: BereqEnd + BereqAcct ?
@@ -254,10 +256,12 @@ vbf_stp_fetchhdr(struct worker *wrk, struct busyobj *bo)
owid = bo->vsl->wid & VSL_IDENTMASK;
bo->vsl->wid = wid | VSL_BACKENDMARKER;
VSLb(bo->vsl, SLT_Begin, "bereq %u retry", owid);
- VDI_CloseFd(&bo->vbc);
return (F_STP_STARTFETCH);
}
- INCOMPL();
+ VSLb(bo->vsl, SLT_VCL_Error,
+ "Too many retries, delivering 503");
+ make_it_503(bo);
+ wrk->handling = VCL_RET_DELIVER;
}
assert(bo->state == BOS_REQ_DONE);
diff --git a/bin/varnishtest/tests/r01401.vtc b/bin/varnishtest/tests/r01401.vtc
new file mode 100644
index 0000000..066974d
--- /dev/null
+++ b/bin/varnishtest/tests/r01401.vtc
@@ -0,0 +1,61 @@
+varnishtest "too many retries"
+
+server s1 {
+ rxreq
+ expect req.url == /1
+ txresp -hdr "foo: bar" -bodylen 5
+
+ accept
+ rxreq
+ expect req.url == /1
+ txresp -hdr "foo: foof" -hdr "Connection: close" -bodylen 7
+
+ accept
+ rxreq
+ expect req.url == /2
+ txresp -hdr "foo: bar" -bodylen 10
+
+ accept
+ rxreq
+ expect req.url == /2
+ txresp -hdr "foo: bar" -bodylen 11
+
+ accept
+ rxreq
+ expect req.url == /2
+ txresp -hdr "foo: bar" -bodylen 12
+
+ accept
+ rxreq
+ expect req.url == /2
+ txresp -hdr "foo: bar" -bodylen 13
+
+ accept
+ rxreq
+ expect req.url == /2
+ txresp -hdr "foo: bar" -bodylen 4
+
+} -start
+
+varnish v1 -vcl+backend {
+ sub vcl_backend_response {
+ if (beresp.http.foo == "bar") {
+ return (retry);
+ }
+ }
+} -start
+
+client c1 {
+ txreq -url /1
+ rxresp
+ expect resp.http.foo == foof
+ expect resp.bodylen == 7
+} -run
+
+delay .1
+
+client c1 {
+ txreq -url /2
+ rxresp
+ expect resp.status == 503
+} -run
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