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https://issues.apache.org/jira/browse/HDFS-15809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17289736#comment-17289736
 ] 

Hadoop QA commented on HDFS-15809:
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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}  0m 
41s{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:green}+1{color} | {color:green} {color} | {color:green}  0m  0s{color} 
| {color:green}test4tests{color} | {color:green} The patch appears to include 1 
new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} || ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  2m 
12s{color} | {color:blue}{color} | {color:blue} Maven dependency ordering for 
branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 19m 
43s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
46s{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}  4m 
27s{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 
12s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
14s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
16m 33s{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 
33s{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}  2m  
6s{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}  3m  
3s{color} | {color:blue}{color} | {color:blue} Used deprecated FindBugs config; 
considering switching to SpotBugs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m 
25s{color} | {color:green}{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
28s{color} | {color:blue}{color} | {color:blue} Maven dependency ordering for 
patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
58s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
37s{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}  4m 
37s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
19s{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}  4m 
19s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
 3s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m  
2s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 1s{color} | {color:green}{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}{color} | {color:green} The patch has no ill-formed 
XML file. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m 42s{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}  1m 
25s{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 
56s{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} findbugs {color} | {color:green}  5m 
32s{color} | {color:green}{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
23s{color} | {color:green}{color} | {color:green} hadoop-hdfs-client in the 
patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}193m 20s{color} 
| 
{color:red}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/496/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}  1m 
 7s{color} | {color:green}{color} | {color:green} The patch does not generate 
ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}293m 51s{color} | 
{color:black}{color} | {color:black}{color} |
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|| Reason || Tests ||
| Failed junit tests | 
hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks |
|   | hadoop.hdfs.server.diskbalancer.command.TestDiskBalancerCommand |
|   | hadoop.hdfs.server.balancer.TestBalancerWithHANameNodes |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl |
|   | hadoop.hdfs.server.balancer.TestBalancer |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/496/artifact/out/Dockerfile
 |
| JIRA Issue | HDFS-15809 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13021085/HDFS-15809.004.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient findbugs checkstyle xml |
| uname | Linux 1317889cbeca 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 / e9a3c2950e8 |
| 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/496/testReport/ |
| Max. process+thread count | 3924 (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/496/console |
| versions | git=2.25.1 maven=3.6.3 findbugs=4.0.6 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> DeadNodeDetector doesn't remove live nodes from dead node set.
> --------------------------------------------------------------
>
>                 Key: HDFS-15809
>                 URL: https://issues.apache.org/jira/browse/HDFS-15809
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Jinglun
>            Assignee: Jinglun
>            Priority: Major
>         Attachments: HDFS-15809.001.patch, HDFS-15809.002.patch, 
> HDFS-15809.003.patch, HDFS-15809.004.patch
>
>
> We found the dead node detector might never remove the alive nodes from the 
> dead node set in a big cluster. For example:
>  # 200 nodes are added to the dead node set by DeadNodeDetector.
>  # DeadNodeDetector#checkDeadNodes() adds 100 nodes to the 
> deadNodesProbeQueue because the queue limited length is 100.
>  # The probe threads start working and probe 30 nodes.
>  # DeadNodeDetector#checkDeadNodes() is scheduled again. It iterates the dead 
> node set  and adds 30 nodes to the deadNodesProbeQueue. But the order is the 
> same as the last time. So the 30 nodes that has already been probed are added 
> to the queue again.
>  # Repeat 3 and 4. But we always add the first 30 nodes from the dead set. If 
> they are all dead then the live nodes behind them could never be recovered.



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