Iterating LinkedList using streams is altering result list due to RaceCondtion

Question

We are iterating the LinkedList using Streams in java8, and creating another list. But due the race condition the result List size got alatered.

List<DesInfo> InfoList = new LinkedList<>();
documentList.stream()
            .parallel()
            .forEach(document -> {
                Info descriptiveInfo = objectFactory.createDescriptiveInfo();
                List<Document> documents = new ArrayList<>();
                documents.add(document);
                descriptiveInfo.setHotelInfo(getHotelInfo(document.get(CODE), documents));
                InfoList.add(Info);
            });

If we runt this code everytime we are seeing different size of InfoList got generated for the same documentList input. I gone through some forums and they mention like LinkedList is not thread-safe and to go for any thread-safe collection instead. But my requirement not allows me to change apart from LinkedList. I need to use parallel streams functionality with the same LinkedList.

Thanks, Raghavan