[ 
https://issues.apache.org/jira/browse/HDFS-14216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16774056#comment-16774056
 ] 

Hadoop QA commented on HDFS-14216:
----------------------------------

| (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 
14s{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} 21m 
 6s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
4s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
53s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
5s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
13m  1s{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 
13s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
49s{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 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
49s{color} | {color:green} hadoop-hdfs-project/hadoop-hdfs: The patch generated 
0 new + 156 unchanged - 1 fixed = 156 total (was 157) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
0s{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} 
12m 31s{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 
15s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
46s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 81m 54s{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}141m 53s{color} | 
{color:black} {color} |
\\
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.qjournal.server.TestJournalNodeSync |
|   | hadoop.hdfs.web.TestWebHdfsTimeouts |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8f97d6f |
| JIRA Issue | HDFS-14216 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12959591/HDFS-14216_6.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux aac757efb6d3 4.4.0-139-generic #165~14.04.1-Ubuntu SMP Wed Oct 
31 10:55:11 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / eedcc8e |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_191 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/26282/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/26282/testReport/ |
| Max. process+thread count | 3943 (vs. ulimit of 10000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/26282/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> NullPointerException happens in NamenodeWebHdfs
> -----------------------------------------------
>
>                 Key: HDFS-14216
>                 URL: https://issues.apache.org/jira/browse/HDFS-14216
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: lujie
>            Assignee: lujie
>            Priority: Critical
>         Attachments: HDFS-14216_1.patch, HDFS-14216_2.patch, 
> HDFS-14216_3.patch, HDFS-14216_4.patch, HDFS-14216_5.patch, 
> HDFS-14216_6.patch, hadoop-hires-namenode-hadoop11.log
>
>
>  workload
> {code:java}
> curl -i -X PUT -T $HOMEPARH/test.txt 
> "http://hadoop1:9870/webhdfs/v1/input?op=CREATE&excludedatanodes=hadoop2";
> {code}
> the method
> {code:java}
> org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.chooseDatanode(String
>  excludeDatanodes){
>     HashSet<Node> excludes = new HashSet<Node>();
>     if (excludeDatanodes != null) {
>        for (String host : StringUtils
>          .getTrimmedStringCollection(excludeDatanodes)) {
>          int idx = host.indexOf(":");
>        if (idx != -1) { 
>             excludes.add(bm.getDatanodeManager().getDatanodeByXferAddr(
>            host.substring(0, idx), Integer.parseInt(host.substring(idx + 
> 1))));
>        } else {
>           
> excludes.add(bm.getDatanodeManager().getDatanodeByHost(host));//line280
>        }
>       }
>     }
> }
> {code}
> when datanode(e.g.hadoop2) is {color:#d04437}just  wiped before 
> line280{color}, or{color:#333333} 
> {color}{color:#ff0000}we{color}{color:#ff0000} give the wrong DN 
> name{color}*,*then  bm.getDatanodeManager().getDatanodeByHost(host) will 
> return null, *_excludes_* *containes null*. while *_excludes_* are used 
> later, NPE happens:
> {code:java}
> java.lang.NullPointerException
> at org.apache.hadoop.net.NodeBase.getPath(NodeBase.java:113)
> at 
> org.apache.hadoop.net.NetworkTopology.countNumOfAvailableNodes(NetworkTopology.java:672)
> at 
> org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:533)
> at 
> org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:491)
> at 
> org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.chooseDatanode(NamenodeWebHdfsMethods.java:323)
> at 
> org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.redirectURI(NamenodeWebHdfsMethods.java:384)
> at 
> org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.put(NamenodeWebHdfsMethods.java:652)
> at 
> org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods$2.run(NamenodeWebHdfsMethods.java:600)
> at 
> org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods$2.run(NamenodeWebHdfsMethods.java:597)
> at org.apache.hadoop.ipc.ExternalCall.run(ExternalCall.java:73)
> at org.apache.hadoop.ipc.ExternalCall.run(ExternalCall.java:30)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1876)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2830)
> {code}
>  



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