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Posted to common-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2013/12/17 21:54:08 UTC
[jira] [Commented] (HADOOP-10172) Cache SASL server factories
[ https://issues.apache.org/jira/browse/HADOOP-10172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850886#comment-13850886 ]
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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