From 03a0dcd2dfeea6942ed76ef3ae5933bff6f7d27a Mon Sep 17 00:00:00 2001
From: Stanislav Malyshev <smalyshev@gmail.com>
Date: Sat, 18 May 2019 16:15:31 +0200
Subject: [PATCH] Better explain display on timeout

Bug: T223711
Change-Id: Ib1eafc44759a1d2b83f049ef3f4d4a83dc77b3fd
---
 .../java/com/bigdata/rdf/sail/webapp/QueryServlet.java    | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/bigdata-core/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/QueryServlet.java b/bigdata-core/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/QueryServlet.java
index c38aac0cfc..5f1f43201e 100644
--- a/bigdata-core/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/QueryServlet.java
+++ b/bigdata-core/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/QueryServlet.java
@@ -1305,6 +1305,10 @@ static private void explainQuery(final String queryStr,
 
             }
 
+            // Flush parts that can be done without waiting for query to finish.
+            // Also open <pre> tag so if the exception happens we're getting nice backtrace.
+            w.write("<pre>");
+            w.flush();
             try {
                 
                 /*
@@ -1338,7 +1342,9 @@ static private void explainQuery(final String queryStr,
                 // Fall through and paint the query stats table(s).
                 
             }
-            
+
+            w.write("</pre>");
+            w.flush();
             
 			current.node("h2", "Query Evaluation Statistics");