k.register(ArrayList.class);
k.register(HashMap.class);
k.register(HashSet.class);
k.register(BigInteger.class, new BigIntegerSerializer());
k.register(TransactionAttempt.class);
JavaBridge clojureSerializersBridge = new JavaBridge();
clojureSerializersBridge.registerClojureCollections(k);
clojureSerializersBridge.registerClojurePrimitives(k);
Map<String, String> registrations = normalizeKryoRegister(conf);
boolean skipMissing = (Boolean) conf.get(Config.TOPOLOGY_SKIP_MISSING_KRYO_REGISTRATIONS);
for(String klassName: registrations.keySet()) {