anmolanmol1234 commented on code in PR #7817:
URL: https://github.com/apache/hadoop/pull/7817#discussion_r2260130542


##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsConnectionManager.java:
##########
@@ -201,7 +279,69 @@ public void shutdown() {
 
   private void logDebug(String message, Object... args) {
     if (LOG.isDebugEnabled()) {
-      LOG.debug(message, args);
+      logDebug(message, args);
+    }
+  }
+
+  /**
+   * Caches extra connections in the {@link KeepAliveCache} to warm it up.
+   * This method is called during initialization and when the cache is empty.
+   *
+   * @param route the HTTP route for which connections are created
+   * @param numberOfConnections the number of connections to create
+   */
+  private void cacheExtraConnection(final HttpRoute route, final int 
numberOfConnections) {
+    if (!isCaching.getAndSet(true)) {
+      long start = System.currentTimeMillis();
+      // Only one thread allowed at a time
+      ExecutorService executorService = 
Executors.newFixedThreadPool(Math.min(numberOfConnections, 5));
+
+      for (int i = 0; i < numberOfConnections; i++) {
+        executorService.submit(() -> {
+          try {
+            HttpClientConnection conn = httpConnectionFactory.create(route, 
null);
+            connect(conn, route, connectionTimeout, new 
AbfsManagedHttpClientContext());
+            addConnectionToCache(conn);
+          } catch (Exception e) {
+           logDebug("Error creating connection: {}", e.getMessage());

Review Comment:
   here add a check that if conn != null then disconnect as exception can occur 
at any stage



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