pooled connections if the client connection is an initial connection.
This avoids the "proxy: error reading status line from remote server"
error caused by the race condition that the backend server closed the
connection after the connection check on our side and before our data
reached the backend. Yes, this downgrades performance, especially with
HTTP/1.0 clients. Hence it is configurable and off by default.
PR: 37770
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@684351
13f79535-47bb-0310-9956-
ffa450edef68
Changes with Apache 2.3.0
[ When backported to 2.2.x, remove entry from this file ]
Changes with Apache 2.3.0
[ When backported to 2.2.x, remove entry from this file ]
+ *) mod_proxy_http: Introduce environment variable proxy-initial-not-pooled to
+ avoid reusing pooled connections if the client connection is an initial
+ connection. PR 37770. [Ruediger Pluem]
+
*) mod_proxy: Add connectiontimeout parameter for proxy workers in order to
be able to set the timeout for connecting to the backend separately.
PR 45445. [Ruediger Pluem, rahul <rahul sun.com>]
*) mod_proxy: Add connectiontimeout parameter for proxy workers in order to
be able to set the timeout for connecting to the backend separately.
PR 45445. [Ruediger Pluem, rahul <rahul sun.com>]
ap_proxy_ssl_connection_cleanup(backend, r);
}
ap_proxy_ssl_connection_cleanup(backend, r);
}
+ /*
+ * In the case that we are handling a reverse proxy connection and this
+ * is not a request that is coming over an already kept alive connection
+ * with the client, do NOT reuse the connection to the backend, because
+ * we cannot forward a failure to the client in this case as the client
+ * does NOT expects this in this situation.
+ * Yes, this creates a performance penalty.
+ */
+ if ((r->proxyreq == PROXYREQ_REVERSE) && (!c->keepalives)
+ && (apr_table_get(r->subprocess_env, "proxy-initial-not-pooled"))) {
+ backend->close = 1;
+ }
+
/* Step One: Determine Who To Connect To */
if ((status = ap_proxy_determine_connection(p, r, conf, worker, backend,
uri, &url, proxyname,
/* Step One: Determine Who To Connect To */
if ((status = ap_proxy_determine_connection(p, r, conf, worker, backend,
uri, &url, proxyname,
else {
conn->addr = worker->cp->addr;
}
else {
conn->addr = worker->cp->addr;
}
+ /* Close a possible existing socket if we are told to do so */
+ if (conn->close) {
+ socket_cleanup(conn);
+ conn->close = 0;
+ }
if (err != APR_SUCCESS) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
if (err != APR_SUCCESS) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,