IllegalStateException: Duplicate key in SubscriptionItem when items share the same name

[saschaszott]

Bug Description

The SubscriptionItem class throws an IllegalStateException: Duplicate key when processing items with identical names.

The error occurs in:

DSpace/dspace-api/src/main/java/org/dspace/subscriptions/SubscriptionItem.java

Line 43 in 0288c36

.collect(toMap(Item::getName, item -> buildUrlForItem(item.getHandle())))

The Collectors.toMap() method does not allow duplicate keys by default. When multiple items share the same name (= value of dc.title), the collector throws an IllegalStateException.

[saschaszott]

Please note, that this bug is CRIS-specific as DSpace does not contain the class SubscriptionItem.