log.warn("Failed to open connection to {} : {}", address, future.cause().getClass().getSimpleName()); cnxFuture.completeExceptionally(new PulsarClientException(future.cause())); cleanupConnection(address, connectionKey, cnxFuture); return; log.debug("Removing closed connection from pool: {}", v); cleanupConnection(address, connectionKey, cnxFuture); }); log.warn("[{}] Connection handshake failed: {}", cnx.channel(), exception.getMessage()); cnxFuture.completeExceptionally(exception); cleanupConnection(address, connectionKey, cnxFuture); cnx.ctx().close(); return null;