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https://issues.apache.org/jira/browse/HDFS-15942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17313565#comment-17313565
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Hadoop QA commented on HDFS-15942:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  1m 
45s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} || ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
0s{color} | {color:green}{color} | {color:green} No case conflicting files 
found. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green}{color} | {color:green} The patch does not contain any 
@author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  
0s{color} | {color:red}{color} | {color:red} The patch doesn't appear to 
include any new or modified tests. Please justify why no new tests are needed 
for this patch. Also please list what manual steps were performed to verify 
this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 37m 
45s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
37s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
29s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
18s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
38s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
19m 46s{color} | {color:green}{color} | {color:green} branch has no errors when 
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
9s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
35s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 26m 
10s{color} | {color:blue}{color} | {color:blue} Both FindBugs and SpotBugs are 
enabled, using SpotBugs. {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  3m 
40s{color} | {color:green}{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
31s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
32s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
32s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
22s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
22s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
 8s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
25s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green}{color} | {color:green} The patch has no whitespace 
issues. {color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green}  0m  
2s{color} | {color:green}{color} | {color:green} The patch has no ill-formed 
XML file. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
16m 16s{color} | {color:green}{color} | {color:green} patch has no errors when 
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
57s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
28s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  3m 
43s{color} | {color:green}{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}343m 59s{color} 
| 
{color:red}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/563/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt{color}
 | {color:red} hadoop-hdfs in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
42s{color} | {color:green}{color} | {color:green} The patch does not generate 
ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}446m  0s{color} | 
{color:black}{color} | {color:black}{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.server.namenode.TestDecommissioningStatus |
|   | hadoop.hdfs.TestDFSShell |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestFsVolumeList |
|   | hadoop.hdfs.server.blockmanagement.TestBlockStatsMXBean |
|   | hadoop.hdfs.server.namenode.TestDecommissioningStatusWithBackoffMonitor |
|   | hadoop.hdfs.server.mover.TestMover |
|   | hadoop.hdfs.server.namenode.ha.TestBootstrapStandby |
|   | hadoop.hdfs.server.datanode.TestDirectoryScanner |
|   | hadoop.hdfs.server.namenode.ha.TestEditLogTailer |
|   | hadoop.hdfs.qjournal.server.TestJournalNodeRespectsBindHostKeys |
|   | hadoop.hdfs.TestPersistBlocks |
|   | hadoop.hdfs.server.datanode.TestBlockRecovery |
|   | hadoop.hdfs.server.namenode.snapshot.TestNestedSnapshots |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/563/artifact/out/Dockerfile
 |
| JIRA Issue | HDFS-15942 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13023326/HDFS-15942.001.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient findbugs checkstyle spotbugs xml |
| uname | Linux a3142ab825ed 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 
05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 158758c5bf1 |
| Default Java | Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/563/testReport/ |
| Max. process+thread count | 2245 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/563/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> Increase Quota initialization threads
> -------------------------------------
>
>                 Key: HDFS-15942
>                 URL: https://issues.apache.org/jira/browse/HDFS-15942
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Stephen O'Donnell
>            Assignee: Stephen O'Donnell
>            Priority: Major
>         Attachments: HDFS-15942.001.patch
>
>
> On large namespaces, the quota initialization at started can take a long time 
> with the default 4 threads. Also on NN failover, often the quota needs to be 
> calculated before the failover can completed, delaying the failover.
> I performed some benchmarks some time back on a large image (316M inodes 35GB 
> on disk), the quota load takes:
> {code}
> quota - 4  threads 39 seconds
> quota - 8  threads 23 seconds
> quota - 12 threads 20 seconds
> quota - 16 threads 15 seconds
> {code}
> As the quota is calculated when the NN is starting up (and hence doing no 
> other work) or at failover time before the new standby becomes active, I 
> think the quota should use as many threads as possible.
> I proposed we change the default to 8 or 12 on at least trunk and branch-3.3 
> so we have a better default going forward.
> Has anyone got any other thoughts?



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