[
https://issues.apache.org/jira/browse/HADOOP-9640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13881747#comment-13881747
]
Hadoop QA commented on HADOOP-9640:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12624909/faircallqueue7_with_runtime_swapping.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 7 new
or modified test files.
{color:red}-1 javac{color}. The applied patch generated 1547 javac
compiler warnings (more than the trunk's current 1546 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:red}-1 findbugs{color}. The patch appears to introduce 5 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:red}-1 core tests{color}. The patch failed these unit tests in
hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs:
org.apache.hadoop.ipc.TestQueueRuntimeReconfigure
org.apache.hadoop.hdfs.server.namenode.TestNameNodeHttpServer
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3467//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3467//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-common.html
Javac warnings:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3467//artifact/trunk/patchprocess/diffJavacWarnings.txt
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3467//console
This message is automatically generated.
> RPC Congestion Control with FairCallQueue
> -----------------------------------------
>
> Key: HADOOP-9640
> URL: https://issues.apache.org/jira/browse/HADOOP-9640
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 3.0.0, 2.2.0
> Reporter: Xiaobo Peng
> Labels: hdfs, qos, rpc
> Attachments: MinorityMajorityPerformance.pdf,
> NN-denial-of-service-updated-plan.pdf, faircallqueue.patch,
> faircallqueue2.patch, faircallqueue3.patch, faircallqueue4.patch,
> faircallqueue5.patch, faircallqueue6.patch,
> faircallqueue7_with_runtime_swapping.patch,
> rpc-congestion-control-draft-plan.pdf
>
>
> Several production Hadoop cluster incidents occurred where the Namenode was
> overloaded and failed to respond.
> We can improve quality of service for users during namenode peak loads by
> replacing the FIFO call queue with a [Fair Call
> Queue|https://issues.apache.org/jira/secure/attachment/12616864/NN-denial-of-service-updated-plan.pdf].
> (this plan supersedes rpc-congestion-control-draft-plan).
> Excerpted from the communication of one incident, “The map task of a user was
> creating huge number of small files in the user directory. Due to the heavy
> load on NN, the JT also was unable to communicate with NN...The cluster
> became responsive only once the job was killed.”
> Excerpted from the communication of another incident, “Namenode was
> overloaded by GetBlockLocation requests (Correction: should be getFileInfo
> requests. the job had a bug that called getFileInfo for a nonexistent file in
> an endless loop). All other requests to namenode were also affected by this
> and hence all jobs slowed down. Cluster almost came to a grinding
> halt…Eventually killed jobtracker to kill all jobs that are running.”
> Excerpted from HDFS-945, “We've seen defective applications cause havoc on
> the NameNode, for e.g. by doing 100k+ 'listStatus' on very large directories
> (60k files) etc.”
--
This message was sent by Atlassian JIRA
(v6.1.5#6160)
