Hotfix for non-deterministic results for partial index

 Under some circumstances the configuration view per each thread
 can become desynchronized when using partial index.

 The issue itself should be tackled in more robust way.

approaches #2382

Author: tulinkry

opengrok-web/src/main/java/org/opengrok/web/AuthorizationFilter.java

@@ -34,6 +34,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.opengrok.indexer.configuration.Project;
+import org.opengrok.indexer.configuration.RuntimeEnvironment;
 import org.opengrok.indexer.logger.LoggerFactory;
 import org.opengrok.indexer.web.PageConfig;
 import org.opengrok.web.api.v1.RestApp;
@@ -51,6 +52,10 @@ public void doFilter(ServletRequest sr, ServletResponse sr1, FilterChain fc) thr
         HttpServletRequest httpReq = (HttpServletRequest) sr;
         HttpServletResponse httpRes = (HttpServletResponse) sr1;
 
+        // This way we trigger refresh for the current configuration value.
+        // Hotfix for #2382
+        RuntimeEnvironment.getInstance().register();
+
         // All RESTful API requests are allowed for now (also see LocalhostFilter).
         // The /search endpoint will go through authorization via SearchEngine.search()
         // so does not have to be exempted here.
@@ -73,7 +78,7 @@ public void doFilter(ServletRequest sr, ServletResponse sr1, FilterChain fc) thr
             } else {
                 LOGGER.log(Level.INFO, "Access denied for URI: {0}", httpReq.getRequestURI());
             }
-            
+
             /**
              * Add the request to the statistics. This is called just once for a
              * single request otherwise the next filter will count the same
@@ -86,12 +91,12 @@ public void doFilter(ServletRequest sr, ServletResponse sr1, FilterChain fc) thr
             config.getEnv().getStatistics().addRequest("requests_forbidden");
             config.getEnv().getStatistics().addRequestTime("requests_forbidden",
                     System.currentTimeMillis() - processTime);
-            
+
             if (!config.getEnv().getConfiguration().getForbiddenIncludeFileContent(false).isEmpty()) {
                 sr.getRequestDispatcher("/eforbidden").forward(sr, sr1);
                 return;
             }
-            
+
             httpRes.sendError(HttpServletResponse.SC_FORBIDDEN, "Access forbidden");
             return;
         }