create http client once per user request

Author: innokenty

proxy/src/main/java/ru/qatools/gridrouter/RouteServlet.java

@@ -103,14 +103,15 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
         List<Region> unvisitedRegions = new ArrayList<>(allRegions);
 
         int attempt = 0;
+        CloseableHttpClient client = newHttpClient();
         while (!allRegions.isEmpty()) {
             attempt++;
 
             Region currentRegion = hostSelectionStrategy.selectRegion(allRegions, unvisitedRegions);
             Host host = hostSelectionStrategy.selectHost(currentRegion.getHosts());
 
             String route = host.getRoute();
-            try (CloseableHttpClient client = newHttpClient()) {
+            try {
                 LOGGER.info("[SESSION_ATTEMPTED] [{}] [{}] [{}] [{}] [{}]", user, remoteHost, browser, route, attempt);
 
                 String target = route + request.getRequestURI();
@@ -146,6 +147,7 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
                 unvisitedRegions = new ArrayList<>(allRegions);
             }
         }
+        client.close();
 
         LOGGER.error("[SESSION_NOT_CREATED] [{}] [{}] [{}]", user, remoteHost, browser);
         replyWithError("Cannot create session on any available node", response);