Hi Niklas, Use the SerializationContext class to fine-tune the serialization. Here an example I use in my projects.
@PostConstruct public void configureSerializationContext() { //ThreadLocal SerializationContent SerializationContext serializationContext = SerializationContext.getSerializationContext(); serializationContext.enableSmallMessages = true; serializationContext.instantiateTypes = true; //use _remoteClass field serializationContext.supportRemoteClass = true; //false Legacy Flex 1.5 behavior was to return a java.util.Collection for Array //true New Flex 2+ behavior is to return Object[] for AS3 Array serializationContext.legacyCollection = false; serializationContext.legacyMap = false; //false Legacy flash.xml.XMLDocument Type //true New E4X XML Type serializationContext.legacyXMLDocument = false; //determines whether the constructed Document is name-space aware serializationContext.legacyXMLNamespaces = false; serializationContext.legacyThrowable = false; serializationContext.legacyBigNumbers = false; serializationContext.restoreReferences = false; serializationContext.logPropertyErrors = false; serializationContext.ignorePropertyErrors = true; } And please note that in the latest 4.7.3 version we intentionally turned off deserialization of XML content and deserialization of objects that are not whitelisted. See here for more details: https://mail-archives.apache.org/mod_mbox/www-announce/201703.mbox/%3c5b016865-2001-479a-9d81-ad8267d78...@c-ware.de%3E Chris Am 03.10.17, 03:37 schrieb "Jack30t" <buesingnik...@gmail.com>: Hey, I just switched from Adobe Flex BlazeDS to Apache Flex BlazeDS. BlazeDS 4.0.0 serialized java.util.HashMap as Object and java.util.ArrayList as Array while BlazeDS 4.7.3 serializes both as "Mixed Array". Is it somehow possible to recieve first one's serialization with BlazeDS 4.7.3? -- Sent from: http://apache-flex-development.2333347.n4.nabble.com/