[fix] Fix UnsupportedException for NonPersistentTopic when there are EntryFilters

[dao-jun]

Motivation

In NonPersistentTopic, we dispatch messages to Consumers by using

               subscription.getDispatcher().sendMessages(Collections.singletonList(entry));

but Collections.SingleList.class didn't override void set(int i, T element) method,
it extends void set(int i, T element) from AbstractList, and AbstractList.set(int i, T element)
throws UnsupportedException.

So the following usage will lead to UnsupportedException:

List<Object> objs = Collections.singletonList(new Object());
objs.set(0, null);

But in AbstractBaseDispatcher#filterEntriesForConsumer, if the filter result is REJECT/RESCHEDULE, it will filter out the entry by calling

entries.set(i, null);

and it will throw UnsupportedException, the exception will caught by ServerCnx#exceptionCaught.

The producer will be closed and try to reconnect.

Modifications

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Matching PR in forked repository

PR in forked repository: dao-jun#3

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[Technoboy-]

Fixed by #20141