Is this a known issue? I had trouble finding any search results.
When iterating over a ServiceLoader while an iteration already is in progress, the first iteration will be aborted. For example, assuming there are at least two implementations of Foo
, the following code will fail with an AssertionError:
ServiceLoader<Foo> loader = ServiceLoader.load(Foo.class);
Iterator<Foo> iter1 = loader.iterator();
iter1.next();
Iterator<Foo> iter2 = loader.iterator();
while (iter2.hasNext()) {
iter2.next();
}
assert iter1.hasNext();
This only seems to occur, if the second iterator really terminates. The code will succeed in this variation for example:
ServiceLoader<Foo> loader = ServiceLoader.load(Foo.class);
Iterator<Foo> iter1 = loader.iterator();
iter1.next();
Iterator<Foo> iter2 = loader.iterator();
iter2.next();
assert iter1.hasNext();
Is this a bug or a feature? :p
Is there a ticket for this already anywhere?