SOLR-17218: Fix indexFetcher logging to include MDC details

Author: hossman

solr/CHANGES.txt

@@ -156,6 +156,8 @@ Bug Fixes
 
 * SOLR-17200: Fix false positive race condition in `/health?requireHealthyCores=true` during core loading (hossman)
 
+* SOLR-17218: Fix indexFetcher logging to include MDC details (hossman)
+
 Dependency Upgrades
 ---------------------
 

solr/core/src/java/org/apache/solr/handler/ReplicationHandler.java

@@ -1214,9 +1214,10 @@ private void setupPolling(String intervalStr) {
       log.info(" No value set for 'pollInterval'. Timer Task not started.");
       return;
     }
-
+    final Map<String, String> context = MDC.getCopyOfContextMap();
     Runnable task =
         () -> {
+          MDC.setContextMap(context);
           if (pollDisabled.get()) {
             log.info("Poll disabled");
             return;