[fix][doc]correct the explanation for invalidateEntries in the EntryCache

[HQebupt]

Motivation

The method invalidateEntries aims to remove from cache all the entries related to a ledger up to lastPosition. And the lastPosition is non-inclusive as opposed to its explanation. See L173.

pulsar/managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/cache/RangeEntryCacheImpl.java

Lines 161 to 173 in e771fc8

	@Override
	public void invalidateEntries(final PositionImpl lastPosition) {
	final PositionImpl firstPosition = PositionImpl.get(-1, 0);
	if (firstPosition.compareTo(lastPosition) > 0) {
	if (log.isDebugEnabled()) {
	log.debug("Attempted to invalidate entries in an invalid range : {} ~ {}",
	firstPosition, lastPosition);
	}
	return;
	}
	Pair<Integer, Long> removed = entries.removeRange(firstPosition, lastPosition, false);

Modifications

correct the explanation for invalidateEntries

Verifying this change

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This change is a trivial rework / code cleanup without any test coverage.

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• Dependencies (does it add or upgrade a dependency): (no)
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• The schema: (no)
• The default values of configurations: (no)
• The wire protocol: (no)
• The rest endpoints: (no)
• The admin cli options: (no)
• Anything that affects deployment: (no)

Documentation

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[HQebupt]

/pulsarbot rerun-failure-checks