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https://issues.apache.org/jira/browse/HDFS-15779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276263#comment-17276263
]
Hadoop QA commented on HDFS-15779:
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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} 1m
44s{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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m
0s{color} | {color:red}{color} | {color:red} The patch doesn't appear to
include any new or modified tests. Please justify why no new tests are needed
for this patch. Also please list what manual steps were performed to verify
this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 22m
52s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
22s{color} | {color:green}{color} | {color:green} trunk passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
14s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private
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| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
59s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
24s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
17m 40s{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} 0m
53s{color} | {color:green}{color} | {color:green} trunk passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
21s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private
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| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 3m
14s{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} 3m
10s{color} | {color:green}{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
14s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
15s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
15s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
8s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Private Build-1.8.0_275-8u275-b01-0ubuntu1~20.04-b01 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
8s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
51s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
14s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green}{color} | {color:green} The patch has no whitespace
issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
15m 0s{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} 0m
50s{color} | {color:green}{color} | {color:green} the patch passed with JDK
Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
20s{color} | {color:green}{color} | {color:green} the patch passed with JDK
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m
23s{color} | {color:green}{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}238m 51s{color}
|
{color:red}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/441/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} 0m
49s{color} | {color:green}{color} | {color:green} The patch does not generate
ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}319m 6s{color} |
{color:black}{color} | {color:black}{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.server.datanode.TestDataNodeUUID |
| | hadoop.hdfs.server.namenode.ha.TestRetryCacheWithHA |
| | hadoop.hdfs.server.namenode.TestNameNodeMXBean |
| | hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/441/artifact/out/Dockerfile
|
| JIRA Issue | HDFS-15779 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/13019409/HDFS-15779.001.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite
unit shadedclient findbugs checkstyle |
| uname | Linux d1069e9bb749 4.15.0-101-generic #102-Ubuntu SMP Mon May 11
10:07:26 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 1a205cc3adf |
| Default Java | Private Build-1.8.0_275-8u275-b01-0ubuntu1~20.04-b01 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.20.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_275-8u275-b01-0ubuntu1~20.04-b01 |
| Test Results |
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/441/testReport/ |
| Max. process+thread count | 2569 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U:
hadoop-hdfs-project/hadoop-hdfs |
| Console output |
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/441/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.
> EC: fix NPE caused by StripedWriter.clearBuffers during reconstruct block
> -------------------------------------------------------------------------
>
> Key: HDFS-15779
> URL: https://issues.apache.org/jira/browse/HDFS-15779
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.2.0
> Reporter: Hongbing Wang
> Assignee: Hongbing Wang
> Priority: Major
> Attachments: HDFS-15779.001.patch
>
>
> The NullPointerException in DN log as follows:
> {code:java}
> 2020-12-28 15:49:25,453 INFO org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeCommand action: DNA_ERASURE_CODING_RECOVERY
> //...
> 2020-12-28 15:51:25,551 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
> Connection timed out
> 2020-12-28 15:51:25,553 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
> Failed to reconstruct striped block:
> BP-1922004198-10.83.xx.xx-1515033360950:blk_-9223372036804064064_6311920695
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedWriter.clearBuffers(StripedWriter.java:299)
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockReconstructor.clearBuffers(StripedBlockReconstructor.java:139)
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockReconstructor.reconstruct(StripedBlockReconstructor.java:115)
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockReconstructor.run(StripedBlockReconstructor.java:60)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 2020-12-28 15:51:25,749 INFO org.apache.hadoop.hdfs.server.datanode.DataNode:
> Receiving
> BP-1922004198-10.83.xx.xx-1515033360950:blk_-9223372036799445643_6313197139
> src: /10.83.xxx.52:53198 dest: /10.83.xxx.52:50
> 010
> {code}
> NPE occurs at `writer.getTargetBuffer()` in codes:
> {code:java}
> // StripedWriter#clearBuffers
> void clearBuffers() {
> for (StripedBlockWriter writer : writers) {
> ByteBuffer targetBuffer = writer.getTargetBuffer();
> if (targetBuffer != null) {
> targetBuffer.clear();
> }
> }
> }
> {code}
> So, why is the writer null? Let's track when the writer is initialized and
> when reconstruct() is called, as follows:
> {code:java}
> // StripedBlockReconstructor#run
> public void run() {
> try {
> initDecoderIfNecessary();
> getStripedReader().init();
> stripedWriter.init(); //①
> reconstruct(); //②
> stripedWriter.endTargetBlocks();
> } catch (Throwable e) {
> LOG.warn("Failed to reconstruct striped block: {}", getBlockGroup(), e);
> // ...{code}
> They are called at ① and ② above respectively. `stripedWriter.init()` ->
> `initTargetStreams()`, as follows:
> {code:java}
> // StripedWriter#initTargetStreams
> int initTargetStreams() {
> int nSuccess = 0;
> for (short i = 0; i < targets.length; i++) {
> try {
> writers[i] = createWriter(i);
> nSuccess++;
> targetsStatus[i] = true;
> } catch (Throwable e) {
> LOG.warn(e.getMessage());
> }
> }
> return nSuccess;
> }
> {code}
> NPE occurs when createWriter() gets an exception and 0 < nSuccess <
> targets.length.
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