When there is an reference loop in the object map, the ProtostuffIOUtil.toByteArray method will result in StackOverflowError. Following are the steps to reproduce this phenomenon.
// 1. define 2 classes, A and B, referencing each other
static class A {
B b;
String name;
}
static class B {
A a;
String name;
}
public static void main(String[] args) {
// 2. create an object "a" and "b", with them referencing each other
A a = new A();
B b = new B();
a.name = "a";
b.name = "b";
a.b = b;
b.a = a;
// 3. try to get byte array for object "a".
Schema<A> schema = RuntimeSchema.getSchema(A.class);
LinkedBuffer buffer = LinkedBuffer.allocate(8192);
ProtostuffIOUtil.toByteArray(a, schema, buffer); // <-- this method call will result in StackOverflowError
}Following is the top part of the error stack
Exception in thread "main" java.lang.StackOverflowError
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:358)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
at io.protostuff.runtime.RuntimeSchema.writeTo(RuntimeSchema.java:475)
at io.protostuff.ProtostuffOutput.writeObject(ProtostuffOutput.java:363)
at io.protostuff.runtime.RuntimeUnsafeFieldFactory$13$1.writeTo(RuntimeUnsafeFieldFactory.java:1048)
...
When there is an reference loop in the object map, the
ProtostuffIOUtil.toByteArraymethod will result inStackOverflowError. Following are the steps to reproduce this phenomenon.Following is the top part of the error stack