BELUGABEHR commented on a change in pull request #869: ZOOKEEPER-3020: Review
of SyncRequestProcessor
URL: https://github.com/apache/zookeeper/pull/869#discussion_r270131198
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File path:
zookeeper-server/src/main/java/org/apache/zookeeper/server/SyncRequestProcessor.java
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@@ -102,103 +108,95 @@ public void run() {
// we do this in an attempt to ensure that not all of the servers
// in the ensemble take a snapshot at the same time
- int randRoll = r.nextInt(snapCount/2);
+ int randRoll = ThreadLocalRandom.current().nextInt(snapCount / 2,
snapCount);
Review comment:
> j.u.Random continues to be an embarrassment, and replacing uses with
ThreadLocalRandom wherever we can is progress.
So says the Java dev team.
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8218282
> When applicable, use of ThreadLocalRandom rather than shared Random
objects in concurrent programs will typically encounter much less overhead and
contention.
>This class also provides additional commonly used bounded random generation
methods.
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadLocalRandom.html
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