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https://issues.apache.org/jira/browse/HADOOP-15830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16643723#comment-16643723
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Íñigo Goiri commented on HADOOP-15830:
--------------------------------------
This part of the code is pretty close to the core so I'd like to get other
reviewers to chime in.
In general, I think that fixing all these small issues is valuable and should
be done; however, people is reluctant given it makes cherry-picking much harder.
Anyway, if we go with this, I would fix the remaining 3 checkstyle issues.
> Server.java Prefer ArrayList
> ----------------------------
>
> Key: HADOOP-15830
> URL: https://issues.apache.org/jira/browse/HADOOP-15830
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 3.2.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
> Attachments: HADOOP-15830.2.patch, HDFS-13969.1.patch
>
>
> * Prefer ArrayDeque over LinkedList (faster, less memory overhead)
> * Address this code:
> {code}
> //
> // Remove calls that have been pending in the responseQueue
> // for a long time.
> //
> private void doPurge(RpcCall call, long now) {
> LinkedList<RpcCall> responseQueue = call.connection.responseQueue;
> synchronized (responseQueue) {
> Iterator<RpcCall> iter = responseQueue.listIterator(0);
> while (iter.hasNext()) {
> call = iter.next();
> if (now > call.timestamp + PURGE_INTERVAL) {
> closeConnection(call.connection);
> break;
> }
> }
> }
> }
> {code}
> It says "Remove calls" (plural) but only one call will be removed because of
> the 'break' statement.
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