BELUGABEHR commented on a change in pull request #870: ZOOKEEPER-3335: Prefer
ArrayList over LinkedList
URL: https://github.com/apache/zookeeper/pull/870#discussion_r269381061
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File path:
zookeeper-server/src/main/java/org/apache/zookeeper/server/ZKDatabase.java
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@@ -281,8 +287,8 @@ public void addCommittedProposal(Request request) {
try {
wl.lock();
if (committedLog.size() > commitLogCount) {
- committedLog.removeFirst();
- minCommittedLog = committedLog.getFirst().packet.getZxid();
+ committedLog.remove();
+ minCommittedLog = committedLog.peek().packet.getZxid();
Review comment:
FYI. There is a slight difference between getFirst() and peek().
getFirst() will throw a NoSuchElementException if the queue is empty. The
peek() method will return a null. So, the change here will subsequently throw a
NullPointerException instead.
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