### Question:
SslFactory implements Configurable { @Override public void configure(Map<String, ?> configs) throws KafkaException { this.protocol = (String) configs.get(SslConfigs.SSL_PROTOCOL_CONFIG); this.provider = (String) configs.get(SslConfigs.SSL_PROVIDER_CONFIG); @SuppressWarnings("unchecked") List<String> cipherSuitesList = (List<String>) configs.get(SslConfigs.SSL_CIPHER_SUITES_CONFIG); if (cipherSuitesList != null) this.cipherSuites = cipherSuitesList.toArray(new String[cipherSuitesList.size()]); @SuppressWarnings("unchecked") List<String> enabledProtocolsList = (List<String>) configs.get(SslConfigs.SSL_ENABLED_PROTOCOLS_CONFIG); if (enabledProtocolsList != null) this.enabledProtocols = enabledProtocolsList.toArray(new String[enabledProtocolsList.size()]); String endpointIdentification = (String) configs.get(SslConfigs.SSL_ENDPOINT_IDENTIFICATION_ALGORITHM_CONFIG); if (endpointIdentification != null) this.endpointIdentification = endpointIdentification; String secureRandomImplementation = (String) configs.get(SslConfigs.SSL_SECURE_RANDOM_IMPLEMENTATION_CONFIG); if (secureRandomImplementation != null) { try { this.secureRandomImplementation = SecureRandom.getInstance(secureRandomImplementation); } catch (GeneralSecurityException e) { throw new KafkaException(e); } } String clientAuthConfig = clientAuthConfigOverride; if (clientAuthConfig == null) clientAuthConfig = (String) configs.get(SslConfigs.SSL_CLIENT_AUTH_CONFIG); if (clientAuthConfig != null) { if (clientAuthConfig.equals("required")) this.needClientAuth = true; else if (clientAuthConfig.equals("requested")) this.wantClientAuth = true; } this.kmfAlgorithm = (String) configs.get(SslConfigs.SSL_KEYMANAGER_ALGORITHM_CONFIG); this.tmfAlgorithm = (String) configs.get(SslConfigs.SSL_TRUSTMANAGER_ALGORITHM_CONFIG); createKeystore((String) configs.get(SslConfigs.SSL_KEYSTORE_TYPE_CONFIG), (String) configs.get(SslConfigs.SSL_KEYSTORE_LOCATION_CONFIG), (Password) configs.get(SslConfigs.SSL_KEYSTORE_PASSWORD_CONFIG), (Password) configs.get(SslConfigs.SSL_KEY_PASSWORD_CONFIG)); createTruststore((String) configs.get(SslConfigs.SSL_TRUSTSTORE_TYPE_CONFIG), (String) configs.get(SslConfigs.SSL_TRUSTSTORE_LOCATION_CONFIG), (Password) configs.get(SslConfigs.SSL_TRUSTSTORE_PASSWORD_CONFIG)); try { this.sslContext = createSSLContext(); } catch (Exception e) { throw new KafkaException(e); } } SslFactory(Mode mode);  SslFactory(Mode mode, String clientAuthConfigOverride); @Override void configure(Map<String, ?> configs); SSLEngine createSslEngine(String peerHost, int peerPort); SSLContext sslContext();  }### Answer:
@Test public void testSslFactoryWithoutPasswordConfiguration() throws Exception { File trustStoreFile = File.createTempFile("truststore", ".jks"); Map<String, Object> serverSslConfig = TestSslUtils.createSslConfig(false, true, Mode.SERVER, trustStoreFile, "server"); serverSslConfig.remove(SslConfigs.SSL_TRUSTSTORE_PASSWORD_CONFIG); SslFactory sslFactory = new SslFactory(Mode.SERVER); try { sslFactory.configure(serverSslConfig); } catch (Exception e) { fail("An exception was thrown when configuring the truststore without a password: " + e); } }