From d9e8960951aa68f8839f35ef16cf4b2469db2b97 Mon Sep 17 00:00:00 2001
From: "opensearch-trigger-bot[bot]"
 <98922864+opensearch-trigger-bot[bot]@users.noreply.github.com>
Date: Tue, 8 Nov 2022 15:20:14 -0600
Subject: [PATCH] Change the output error message back to use
 OpenSearchException in the cause chain (#5081) (#5085)

Signed-off-by: Xue Zhou <xuezhou@amazon.com>
(cherry picked from commit d479853e5edddc648be2f174ea1cf01f0fabcdb3)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
---
 server/src/main/java/org/opensearch/OpenSearchException.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/main/java/org/opensearch/OpenSearchException.java b/server/src/main/java/org/opensearch/OpenSearchException.java
index 5cf64f873e5cc..a8107a80ea8b7 100644
--- a/server/src/main/java/org/opensearch/OpenSearchException.java
+++ b/server/src/main/java/org/opensearch/OpenSearchException.java
@@ -603,7 +603,7 @@ public static void generateFailureXContent(XContentBuilder builder, Params param
                 }
                 t = t.getCause();
             }
-            builder.field(ERROR, ExceptionsHelper.summaryMessage(e));
+            builder.field(ERROR, ExceptionsHelper.summaryMessage(t != null ? t : e));
             return;
         }