Updated CHANGELOG.md

# Conflicts:
#	exporters/otlp/testing-internal/src/main/java/io/opentelemetry/exporter/otlp/testing/internal/AbstractHttpTelemetryExporterTest.java

Author: Debashismitra01

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+### SDK
+
+#### Exporters
+
+* OTLP: Fix OkHttp HTTP sender dropping client certificates when client TLS is configured without custom trusted certificates.
+
 ## Version 1.63.0 (2026-06-05)
 
 ### API

exporters/common/src/main/java/io/opentelemetry/exporter/internal/TlsUtil.java

@@ -95,9 +95,8 @@ public static X509KeyManager keyManager(byte[] privateKeyPem, byte[] certificate
       throw new SSLException("Could not build KeyManagerFactory from clientKeysPem.", e);
     }
   }
-  /**
-   * Returns the platform default {@link X509TrustManager}.
-   */
+
+  /** Returns the platform default {@link X509TrustManager}. */
   public static X509TrustManager defaultTrustManager() throws SSLException {
     try {
       TrustManagerFactory tmf =
@@ -117,6 +116,7 @@ public static X509TrustManager defaultTrustManager() throws SSLException {
       throw new SSLException("Could not build default TrustManager.", e);
     }
   }
+
   // Visible for testing
   static PrivateKey generatePrivateKey(PKCS8EncodedKeySpec keySpec, List<KeyFactory> keyFactories)
       throws SSLException {

exporters/sender/okhttp/src/main/java/io/opentelemetry/exporter/sender/okhttp/internal/OkHttpHttpSender.java

@@ -8,7 +8,6 @@
 import io.opentelemetry.api.impl.InstrumentationUtil;
 import io.opentelemetry.exporter.internal.RetryUtil;
 import io.opentelemetry.exporter.internal.TlsUtil;
-import javax.net.ssl.SSLException;
 import io.opentelemetry.sdk.common.CompletableResultCode;
 import io.opentelemetry.sdk.common.export.Compressor;
 import io.opentelemetry.sdk.common.export.HttpResponse;
@@ -30,6 +29,7 @@
 import java.util.logging.Logger;
 import javax.annotation.Nullable;
 import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLException;
 import javax.net.ssl.X509TrustManager;
 import okhttp3.Call;
 import okhttp3.Callback;
@@ -120,9 +120,7 @@ public OkHttpHttpSender(
           throw new IllegalStateException("Unable to initialize default trust manager", e);
         }
       }
-      builder.sslSocketFactory(
-          sslContext.getSocketFactory(),
-          effectiveTrustManager);
+      builder.sslSocketFactory(sslContext.getSocketFactory(), effectiveTrustManager);
     }
 
     this.client = builder.build();