protostuff return stackoverflow and other error msg

[Moriadry-zz]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.4
• Operating System version: macos 10.13.6
• Java version: 1.8

Steps to reproduce this issue

add unit test in ProtostuffObjectOutputTest.class and failed:

    @Test
    public void testListObject() throws IOException, ClassNotFoundException {
        List<SerializablePerson> list = new ArrayList<SerializablePerson>();
        list.add(new SerializablePerson());
        list.add(new SerializablePerson());
        list.add(new SerializablePerson());
        SerializablePersonList personList = new SerializablePersonList(list);
        this.protostuffObjectOutput.writeObject(personList);
        this.flushToInput();

        SerializablePersonList serializedTime = protostuffObjectInput.readObject(SerializablePersonList.class);
        assertThat(serializedTime, is(personList));
    }

 private class SerializablePersonList implements Serializable {
        private static final long serialVersionUID = 1L;

        public List<SerializablePerson> personList;

        public SerializablePersonList() {}

        public SerializablePersonList(List<SerializablePerson> list) {
            this.personList = list;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj)
                return true;
            if (obj == null)
                return false;
            if (getClass() != obj.getClass())
                return false;

            SerializablePersonList list = (SerializablePersonList) obj;
            if (list.personList == null && this.personList == null)
                return true;
            if (list.personList == null || this.personList == null)
                return false;
            if (list.personList.size() != this.personList.size())
                return false;
            for (int i =0; i < this.personList.size(); i++) {
                if (!this.personList.get(i).equals(list.personList.get(i)))
                    return false;
            }
            return true;
        }
    }

This is one case, and I have found the reason and raised a pr to fix it, But there is another stackoverflow still exist.

Pls. provide [GitHub address] to reproduce this issue.

Expected Result

What do you expected from the above steps？

test success

Actual Result

What actually happens?

test failed

If there is an exception, please attach the exception trace:

Just put your stack trace here!