From d460530f0bb8d049e08a6b51128d01b7378b7c8b Mon Sep 17 00:00:00 2001
From: Mikhail Khludnev <mkhl@apache.org>
Date: Tue, 24 Jun 2025 10:59:00 +0300
Subject: [PATCH] SOLR-17794: Log content stream JSON payload as cs.params in
 SlowRequest log.

---
 .../java/org/apache/solr/request/json/RequestUtil.java    | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/solr/core/src/java/org/apache/solr/request/json/RequestUtil.java b/solr/core/src/java/org/apache/solr/request/json/RequestUtil.java
index 39bc03dc562..0326e707324 100644
--- a/solr/core/src/java/org/apache/solr/request/json/RequestUtil.java
+++ b/solr/core/src/java/org/apache/solr/request/json/RequestUtil.java
@@ -20,6 +20,7 @@
 import static org.apache.solr.common.params.CommonParams.SORT;
 
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -32,6 +33,7 @@
 import org.apache.solr.handler.component.SearchHandler;
 import org.apache.solr.request.SolrQueryRequest;
 import org.apache.solr.request.SolrRequestHandler;
+import org.apache.solr.request.SolrRequestInfo;
 import org.apache.solr.request.macro.MacroExpander;
 import org.apache.solr.search.QueryParsing;
 import org.noggit.JSONParser;
@@ -98,6 +100,12 @@ public static void processParams(
               e);
         }
       }
+      if (map.containsKey(JSON)) { // something appears after processing content streams
+        SolrRequestInfo.getReqInfo()
+            .ifPresent(
+                reqInfo ->
+                    reqInfo.getRsp().getToLog().add("cs.params", Arrays.toString(map.get(JSON))));
+      }
 
       // append existing "json" params
       if (jsonFromParams != null) {