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https://issues.apache.org/jira/browse/HDFS-15068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17002216#comment-17002216
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Hadoop QA commented on HDFS-15068:
----------------------------------

| (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 
52s{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 1 new or modified test 
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 20m 
32s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
9s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
47s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
21s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
16m 46s{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 
25s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
23s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
9s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m  
9s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
45s{color} | {color:green} hadoop-hdfs-project/hadoop-hdfs: The patch generated 
0 new + 224 unchanged - 1 fixed = 224 total (was 225) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
21s{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} 
16m  3s{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 
47s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
18s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}121m  9s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
49s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}191m 40s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.TestFileChecksum |
|   | hadoop.hdfs.TestDeadNodeDetection |
|   | hadoop.hdfs.TestMultipleNNPortQOP |
|   | hadoop.hdfs.server.namenode.TestRedudantBlocks |
|   | hadoop.hdfs.server.namenode.snapshot.TestRenameWithSnapshots |
|   | hadoop.hdfs.TestReconstructStripedFile |
|   | hadoop.hdfs.TestFileChecksumCompositeCrc |
|   | hadoop.hdfs.TestRollingUpgrade |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.5 Server=19.03.5 Image:yetus/hadoop:c44943d1fc3 |
| JIRA Issue | HDFS-15068 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12989374/HDFS-15068.005.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 86669da142b4 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 
05:24:09 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / c44943d |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_232 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/28557/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/28557/testReport/ |
| Max. process+thread count | 3040 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/28557/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> DataNode could meet deadlock if invoke refreshVolumes when register
> -------------------------------------------------------------------
>
>                 Key: HDFS-15068
>                 URL: https://issues.apache.org/jira/browse/HDFS-15068
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Xiaoqiao He
>            Assignee: Aiphago
>            Priority: Critical
>         Attachments: HDFS-15068.001.patch, HDFS-15068.002.patch, 
> HDFS-15068.003.patch, HDFS-15068.004.patch, HDFS-15068.005.patch
>
>
> DataNode could meet deadlock when invoke `dfsadmin -reconfig datanode ip:host 
> start` to trigger #refreshVolumes.
> 1. DataNod#refreshVolumes hold datanode instance ownable {{synchronizer}} 
> when enter this method first, then try to hold BPOfferService {{readlock}} 
> when `bpos.getNamespaceInfo()` in following code segment. 
> {code:java}
>         for (BPOfferService bpos : blockPoolManager.getAllNamenodeThreads()) {
>           nsInfos.add(bpos.getNamespaceInfo());
>         }
> {code}
> 2. BPOfferService#registrationSucceeded (which is invoked by #register when 
> DataNode start or #reregister when processCommandFromActor) hold 
> BPOfferService {{writelock}} first, then try to hold datanode instance 
> ownable {{synchronizer}} in following method.
> {code:java}
>   synchronized void bpRegistrationSucceeded(DatanodeRegistration 
> bpRegistration,
>       String blockPoolId) throws IOException {
>     id = bpRegistration;
>     if(!storage.getDatanodeUuid().equals(bpRegistration.getDatanodeUuid())) {
>       throw new IOException("Inconsistent Datanode IDs. Name-node returned "
>           + bpRegistration.getDatanodeUuid()
>           + ". Expecting " + storage.getDatanodeUuid());
>     }
>     
>     registerBlockPoolWithSecretManager(bpRegistration, blockPoolId);
>   }
> {code}



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