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https://issues.apache.org/jira/browse/HADOOP-10172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850886#comment-13850886
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Hadoop QA commented on HADOOP-10172:
------------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12619149/HADOOP-10172.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3365//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3365//console
This message is automatically generated.
> Cache SASL server factories
> ---------------------------
>
> Key: HADOOP-10172
> URL: https://issues.apache.org/jira/browse/HADOOP-10172
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HADOOP-10172.patch
>
>
> Performance for SASL server creation is _atrocious_.
> {{Sasl.createSaslServer}} does not cache the provider resolution for the
> factories. Factory resolution and server instantiation has 3 major
> contention points. During bursts of connections, one reader accepting a
> connection stalls other readers accepting connections, in turn stalling all
> existing connections handled by those readers.
> I benched 5 threads at 187 instances/s - total, not per thread. With this
> and another change, I've boosted it to 33K instances/s.
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