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https://issues.apache.org/jira/browse/HDFS-13677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16828800#comment-16828800
 ] 

Hadoop QA commented on HDFS-13677:
----------------------------------

| (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 
23s{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} 17m 
28s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
56s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
41s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
4s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m  3s{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}  2m  
0s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
55s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
 1s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
51s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
51s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
38s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
11m 49s{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}  2m  
7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
48s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 76m 38s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
37s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}131m 54s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | 
hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks |
|   | hadoop.hdfs.web.TestWebHdfsTimeouts |
|   | hadoop.hdfs.TestRollingUpgrade |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce base: 
https://builds.apache.org/job/hadoop-multibranch/job/PR-780/3/artifact/out/Dockerfile
 |
| GITHUB PR | https://github.com/apache/hadoop/pull/780 |
| JIRA Issue | HDFS-13677 |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 3140035b8a9a 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 
17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 43b2a4b |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_191 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/hadoop-multibranch/job/PR-780/3/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/hadoop-multibranch/job/PR-780/3/testReport/ |
| Max. process+thread count | 3989 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/hadoop-multibranch/job/PR-780/3/console |
| Powered by | Apache Yetus 0.9.0 http://yetus.apache.org |


This message was automatically generated.



> Dynamic refresh Disk configuration results in overwriting VolumeMap
> -------------------------------------------------------------------
>
>                 Key: HDFS-13677
>                 URL: https://issues.apache.org/jira/browse/HDFS-13677
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: xuzq
>            Priority: Major
>         Attachments: HDFS-13677-001.patch, HDFS-13677-002.patch, 
> image-2018-06-14-13-05-54-354.png, image-2018-06-14-13-10-24-032.png
>
>
> When I added a new disk by dynamically refreshing the configuration, an 
> exception "FileNotFound while finding block" was caused.
>  
> The steps are as follows:
> 1.Change the hdfs-site.xml of DataNode to add a new disk.
> 2.Refresh the configuration by "./bin/hdfs dfsadmin -reconfig datanode 
> ****:50020 start"
>  
> The error is like:
> ```
> VolumeScannerThread(/media/disk5/hdfs/dn): FileNotFound while finding block 
> BP-233501496-*.*.*.*-1514185698256:blk_1620868560_547245090 on volume 
> /media/disk5/hdfs/dn
> org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not 
> found for BP-1997955181-*.*.*.*-1514186468560:blk_1090885868_17145082
>  at 
> org.apache.hadoop.hdfs.server.datanode.BlockSender.getReplica(BlockSender.java:471)
>  at 
> org.apache.hadoop.hdfs.server.datanode.BlockSender.<init>(BlockSender.java:240)
>  at 
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:553)
>  at 
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:148)
>  at 
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:103)
>  at 
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:254)
>  at java.lang.Thread.run(Thread.java:748)
> ```
> I added some logs for confirmation, as follows:
> Log Code like:
> !image-2018-06-14-13-05-54-354.png!
> And the result is like:
> !image-2018-06-14-13-10-24-032.png!  
> The Size of 'VolumeMap' has been reduced, and We found the 'VolumeMap' to be 
> overridden by the new Disk Block by the method 'ReplicaMap.addAll(ReplicaMap 
> other)'.
>  



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