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https://issues.apache.org/jira/browse/HDFS-15605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17212491#comment-17212491
 ] 

Hadoop QA commented on HDFS-15605:
----------------------------------

| (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 
18s{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} No case conflicting files found. {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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
56s{color} |  | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 21m 
20s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
14s{color} |  | {color:green} trunk passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  3m 
51s{color} |  | {color:green} trunk passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
57s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m  
7s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
18m 58s{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 
29s{color} |  | {color:green} trunk passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
57s{color} |  | {color:green} trunk passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue}  3m 
17s{color} |  | {color:blue} Used deprecated FindBugs config; considering 
switching to SpotBugs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m 
55s{color} |  | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
26s{color} |  | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  2m 
 2s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
28s{color} |  | {color:green} the patch passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  4m 
28s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m  
2s{color} |  | {color:green} the patch passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  4m  
2s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} blanks {color} | {color:green}  0m  
0s{color} |  | {color:green} The patch has no blanks issues. {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
53s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m  
3s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
19m 25s{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}  1m 
19s{color} |  | {color:green} the patch passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
47s{color} |  | {color:green} the patch passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m 
45s{color} |  | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
16s{color} |  | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}111m  0s{color} 
| 
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt|https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/224/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt]
 | {color:red} hadoop-hdfs in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
36s{color} |  | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}215m  3s{color} | 
 | {color:black}{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.TestFileChecksum |
|   | hadoop.hdfs.server.balancer.TestBalancerWithHANameNodes |
|   | hadoop.hdfs.server.datanode.TestBPOfferService |
|   | hadoop.tools.TestHdfsConfigFields |
|   | hadoop.hdfs.server.namenode.ha.TestStandbyCheckpoints |
|   | hadoop.hdfs.web.TestWebHDFS |
|   | hadoop.hdfs.TestGetFileChecksum |
|   | hadoop.hdfs.TestFileChecksumCompositeCrc |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.40 ServerAPI=1.40 base: 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/224/artifact/out/Dockerfile
 |
| JIRA Issue | HDFS-15605 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13013437/HDFS-15605.003.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient findbugs checkstyle |
| uname | Linux 0e410b963d25 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / b92f72758bf9b93bc20445a7737346ccb02208e8 |
| Default Java | Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/224/testReport/ |
| Max. process+thread count | 2976 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client 
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/224/console |
| versions | git=2.17.1 maven=3.6.0 findbugs=4.1.3 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> DeadNodeDetector supports getting deadnode from NameNode.
> ---------------------------------------------------------
>
>                 Key: HDFS-15605
>                 URL: https://issues.apache.org/jira/browse/HDFS-15605
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Jinglun
>            Assignee: Jinglun
>            Priority: Major
>         Attachments: HDFS-15605.001.patch, HDFS-15605.002.patch, 
> HDFS-15605.003.patch
>
>
> When we are using DeadNodeDetector, sometimes it marks too many nodes as dead 
> and cause the read failures. The DeadNodeDetector assumes all the 
> getDatanodeInfo rpcs failed to return in time are dead nodes. But actually 
> not. A client side error or a slow rpc in DataNode might be marked as dead 
> too. For example the client side delay of the rpcThreadPool might cause the 
> getDatanodeInfo rpcs timeout and adding many datanodes to the dead list.
> We have a simple improvement for this: the NameNode already knows which 
> datanodes are dead. So just update the dead list from NameNode using 
> DFSClient.datanodeReport().



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