From 2fbc511c3810afc228647741693d2d0b954719b8 Mon Sep 17 00:00:00 2001
From: Shalin Shekhar Mangar <shalin@apache.org>
Date: Thu, 19 Jun 2014 04:32:50 +0000
Subject: [PATCH] SOLR-6161: Walk the entire cause chain looking for an Error

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1603708 13f79535-47bb-0310-9956-ffa450edef68
---
 .../apache/solr/servlet/SolrDispatchFilter.java  | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/solr/core/src/java/org/apache/solr/servlet/SolrDispatchFilter.java b/solr/core/src/java/org/apache/solr/servlet/SolrDispatchFilter.java
index 0969bb4fc31..13c890387e6 100644
--- a/solr/core/src/java/org/apache/solr/servlet/SolrDispatchFilter.java
+++ b/solr/core/src/java/org/apache/solr/servlet/SolrDispatchFilter.java
@@ -434,12 +434,16 @@ public class SolrDispatchFilter extends BaseSolrFilter {
       } 
       catch (Throwable ex) {
         sendError( core, solrReq, request, (HttpServletResponse)response, ex );
-        if (ex instanceof Error) {
-          throw (Error) ex;
-        }
-        if (ex.getCause() != null && ex.getCause() instanceof Error)  {
-          log.error("An Error was wrapped in another exception - please report complete stacktrace on SOLR-6161", ex);
-          throw (Error) ex.getCause();
+        // walk the the entire cause chain to search for an Error
+        Throwable t = ex;
+        while (t != null) {
+          if (t instanceof Error)  {
+            if (t != ex)  {
+              log.error("An Error was wrapped in another exception - please report complete stacktrace on SOLR-6161", ex);
+            }
+            throw (Error) t;
+          }
+          t = t.getCause();
         }
         return;
       } finally {