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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14090) RBF: Improved isolation for downstream name nodes.
Date Wed, 31 Jul 2019 23:09:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16897608#comment-16897608
] 

Hadoop QA commented on HDFS-14090:
----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 20s{color} | {color:blue}
Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  0s{color} |
{color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m  0s{color}
| {color:green} The patch appears to include 2 new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 18m 56s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 32s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 19s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 34s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 11m 24s{color}
| {color:green} branch has no errors when building and testing our client artifacts. {color}
|
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m  2s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 32s{color} |
{color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 33s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 25s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 25s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 15s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 31s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  1s{color}
| {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green}  0m  1s{color} | {color:green}
The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 11m 52s{color}
| {color:green} patch has no errors when building and testing our client artifacts. {color}
|
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m  3s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 33s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 22m 41s{color} | {color:red}
hadoop-hdfs-rbf in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 25s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 72m 51s{color} | {color:black}
{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.server.federation.security.TestRouterHttpDelegationToken
|
|   | hadoop.hdfs.server.federation.router.TestRouterWithSecureStartup |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.1 Server=19.03.1 Image:yetus/hadoop:bdbca0e |
| JIRA Issue | HDFS-14090 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12976367/HDFS-14090.009.patch
|
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit
 shadedclient  findbugs  checkstyle  xml  |
| uname | Linux 250965062b1a 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 10:58:50 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / b008072 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_212 |
| findbugs | v3.1.0-RC1 |
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/27361/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs-rbf.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/27361/testReport/ |
| Max. process+thread count | 1622 (vs. ulimit of 10000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-rbf U: hadoop-hdfs-project/hadoop-hdfs-rbf
|
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/27361/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> RBF: Improved isolation for downstream name nodes.
> --------------------------------------------------
>
>                 Key: HDFS-14090
>                 URL: https://issues.apache.org/jira/browse/HDFS-14090
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: CR Hota
>            Assignee: CR Hota
>            Priority: Major
>         Attachments: HDFS-14090-HDFS-13891.001.patch, HDFS-14090-HDFS-13891.002.patch,
HDFS-14090-HDFS-13891.003.patch, HDFS-14090-HDFS-13891.004.patch, HDFS-14090-HDFS-13891.005.patch,
HDFS-14090.006.patch, HDFS-14090.007.patch, HDFS-14090.008.patch, HDFS-14090.009.patch, RBF_
Isolation design.pdf
>
>
> Router is a gateway to underlying name nodes. Gateway architectures, should help minimize
impact of clients connecting to healthy clusters vs unhealthy clusters.
> For example - If there are 2 name nodes downstream, and one of them is heavily loaded
with calls spiking rpc queue times, due to back pressure the same with start reflecting on
the router. As a result of this, clients connecting to healthy/faster name nodes will also
slow down as same rpc queue is maintained for all calls at the router layer. Essentially the
same IPC thread pool is used by router to connect to all name nodes.
> Currently router uses one single rpc queue for all calls. Lets discuss how we can change
the architecture and add some throttling logic for unhealthy/slow/overloaded name nodes.
> One way could be to read from current call queue, immediately identify downstream name
node and maintain a separate queue for each underlying name node. Another simpler way is to
maintain some sort of rate limiter configured for each name node and let routers drop/reject/send
error requests after certain threshold. 
> This won’t be a simple change as router’s ‘Server’ layer would need redesign
and implementation. Currently this layer is the same as name node.
> Opening this ticket to discuss, design and implement this feature.
>  



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