src/java.net.http/share/classes/jdk/internal/net/http/Http2ClientImpl.java

*** 88,98 ****
       * 1. completes with ALPN exception: h2 negotiate failed for first time. failure recorded.
       * 2. completes with other exception: failure not recorded. Caller must handle
       * 3. completes normally with null: no connection in cache for h2c or h2 failed previously
       * 4. completes normally with connection: h2 or h2c connection in cache. Use it.
       */
!     CompletableFuture<Http2Connection> getConnectionFor(HttpRequestImpl req) {
          URI uri = req.uri();
          InetSocketAddress proxy = req.proxy();
          String key = Http2Connection.keyFor(uri, proxy);
  
          synchronized (this) {
--- 88,99 ----
       * 1. completes with ALPN exception: h2 negotiate failed for first time. failure recorded.
       * 2. completes with other exception: failure not recorded. Caller must handle
       * 3. completes normally with null: no connection in cache for h2c or h2 failed previously
       * 4. completes normally with connection: h2 or h2c connection in cache. Use it.
       */
!     CompletableFuture<Http2Connection> getConnectionFor(HttpRequestImpl req,
!                                                         Exchange<?> exchange) {
          URI uri = req.uri();
          InetSocketAddress proxy = req.proxy();
          String key = Http2Connection.keyFor(uri, proxy);
  
          synchronized (this) {
*** 121,131 ****
                  if (debug.on()) debug.log("not found in connection pool");
                  return MinimalFuture.completedFuture(null);
              }
          }
          return Http2Connection
!                 .createAsync(req, this)
                  .whenComplete((conn, t) -> {
                      synchronized (Http2ClientImpl.this) {
                          if (conn != null) {
                              try {
                                  conn.reserveStream(true);
--- 122,132 ----
                  if (debug.on()) debug.log("not found in connection pool");
                  return MinimalFuture.completedFuture(null);
              }
          }
          return Http2Connection
!                 .createAsync(req, this, exchange)
                  .whenComplete((conn, t) -> {
                      synchronized (Http2ClientImpl.this) {
                          if (conn != null) {
                              try {
                                  conn.reserveStream(true);