From 1f6a3bca68149eb263a1287f3aeed767226813ad Mon Sep 17 00:00:00 2001
From: Daniel Widdis <widdis@gmail.com>
Date: Tue, 20 Jun 2023 14:40:42 -0700
Subject: [PATCH] Consume all params and content on extension Rest Request
 exception (#8096)

Signed-off-by: Daniel Widdis <widdis@gmail.com>
---
 .../opensearch/rest/extensions/RestSendToExtensionAction.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/server/src/main/java/org/opensearch/rest/extensions/RestSendToExtensionAction.java b/server/src/main/java/org/opensearch/rest/extensions/RestSendToExtensionAction.java
index 8c4e3f4b42412..51ff74b1869a0 100644
--- a/server/src/main/java/org/opensearch/rest/extensions/RestSendToExtensionAction.java
+++ b/server/src/main/java/org/opensearch/rest/extensions/RestSendToExtensionAction.java
@@ -219,6 +219,10 @@ public void handleResponse(RestExecuteOnExtensionResponse response) {
             @Override
             public void handleException(TransportException exp) {
                 logger.debug("REST request failed", exp);
+                // On failure the original request params and content aren't consumed
+                // which gives misleading error messages, so we just consume them here
+                request.params().keySet().stream().forEach(p -> request.param(p));
+                request.content();
                 inProgressFuture.completeExceptionally(exp);
             }