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https://issues.apache.org/jira/browse/ZOOKEEPER-2784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16018288#comment-16018288
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ASF GitHub Bot commented on ZOOKEEPER-2784:
-------------------------------------------
Github user eribeiro commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/257#discussion_r117600729
--- Diff:
src/java/main/org/apache/zookeeper/server/quorum/QuorumCnxManager.java ---
@@ -310,8 +311,8 @@ public boolean initiateConnection(Socket sock, Long
sid) {
* possible long value to lose the challenge.
*
*/
- public void receiveConnection(Socket sock) {
- Long sid = null, protocolVersion = null;
+ public void receiveConnection(Socket sock) throws ConfigException {
+ Long sid, protocolVersion;
--- End diff --
Yes, integers whose values are between -127 and 128 (inclusive) are cached
inside Integer object.
Plus, boxing/unboxing in a tight loop (not the case here!) can be a huge
performance pitfall. For example:
```
for (Integer it = 0; it < 10000; ){
it += 1;
}
```
Used to have abysmal performance numbers due to many auto boxing/unboxing .
> Add some limitations on code level for `SID` to avoid configuration problem
> ---------------------------------------------------------------------------
>
> Key: ZOOKEEPER-2784
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2784
> Project: ZooKeeper
> Issue Type: Improvement
> Components: quorum
> Affects Versions: 3.5.2
> Reporter: Benedict Jin
> Fix For: 3.6.0
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> As so far, `QuorumCnxManager#receiveConnection` cannot find out the same
> `SID` problem, then the Zookeeper cluster will start successfully. But the
> cluster is not health, and it will throw some problem like `not
> synchronized`. So, i thought we should add some limitations on code level for
> `SID` to find those configuration problem more early.
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