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https://issues.apache.org/jira/browse/HDFS-6489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15209074#comment-15209074
 ] 

Hadoop QA commented on HDFS-6489:
---------------------------------

| (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: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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 1m 11s 
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m 
4s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 6m 4s 
{color} | {color:green} trunk passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 6m 54s 
{color} | {color:green} trunk passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 
7s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 53s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
29s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m 
46s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 4s 
{color} | {color:green} trunk passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 57s 
{color} | {color:green} trunk passed with JDK v1.7.0_95 {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 14s 
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 
28s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 5m 56s 
{color} | {color:green} the patch passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 5m 56s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 6m 49s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 6m 49s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 1m 8s 
{color} | {color:red} root: patch generated 1 new + 151 unchanged - 0 fixed = 
152 total (was 151) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 53s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
30s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 
0s {color} | {color:green} Patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 20s 
{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs generated 1 new + 0 
unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 6s 
{color} | {color:green} the patch passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 59s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 21m 39s {color} 
| {color:red} hadoop-common in the patch failed with JDK v1.8.0_74. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 72m 2s {color} 
| {color:red} hadoop-hdfs in the patch failed with JDK v1.8.0_74. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 7m 3s {color} | 
{color:red} hadoop-common in the patch failed with JDK v1.7.0_95. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 75m 25s {color} 
| {color:red} hadoop-hdfs in the patch failed with JDK v1.7.0_95. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red} 0m 25s 
{color} | {color:red} Patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 239m 23s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs-project/hadoop-hdfs |
|  |  
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.append(String,
 FinalizedReplica, long, long) calls Thread.sleep() with a lock held  At 
FsDatasetImpl.java:Thread.sleep() with a lock held  At FsDatasetImpl.java:[line 
1176] |
| JDK v1.8.0_74 Failed junit tests | 
hadoop.hdfs.TestDFSStripedOutputStreamWithFailure180 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure020 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure170 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure200 |
|   | hadoop.hdfs.TestDFSClientRetries |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure120 |
|   | hadoop.hdfs.TestLeaseRecoveryStriped |
|   | hadoop.hdfs.TestDFSStripedOutputStream |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure030 |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestWriteToReplica |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure060 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure190 |
|   | hadoop.hdfs.TestEncryptedTransfer |
| JDK v1.8.0_74 Timed out junit tests | 
org.apache.hadoop.util.TestNativeLibraryChecker |
|   | org.apache.hadoop.http.TestHttpServerLifecycle |
| JDK v1.7.0_95 Failed junit tests | hadoop.net.TestClusterTopology |
|   | hadoop.hdfs.TestHFlush |
|   | hadoop.hdfs.TestReplication |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure090 |
|   | hadoop.hdfs.TestReadStripedFileWithDecoding |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure200 |
|   | hadoop.hdfs.server.namenode.TestReconstructStripedBlocks |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure160 |
|   | hadoop.hdfs.server.namenode.TestProcessCorruptBlocks |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure110 |
|   | hadoop.hdfs.TestEncryptionZonesWithKMS |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure120 |
|   | hadoop.hdfs.TestDFSStripedOutputStream |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl |
|   | hadoop.hdfs.server.datanode.fsdataset.impl.TestWriteToReplica |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure060 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure210 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure080 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure070 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure190 |
|   | hadoop.hdfs.server.datanode.TestDataNodeVolumeFailure |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure040 |
| JDK v1.7.0_95 Timed out junit tests | 
org.apache.hadoop.util.TestNativeLibraryChecker |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:fbe3e86 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12795008/HDFS-6489.001.patch |
| JIRA Issue | HDFS-6489 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 77ab4c0dff4d 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed 
Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / af1d125 |
| Default Java | 1.7.0_95 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_74 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_95 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/diff-checkstyle-root.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/new-findbugs-hadoop-hdfs-project_hadoop-hdfs.html
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.8.0_74.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.8.0_74.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_95.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_95.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.8.0_74.txt
 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.8.0_74.txt
 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_95.txt
 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_95.txt
 |
| JDK v1.7.0_95  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/artifact/patchprocess/patch-asflicense-problems.txt
 |
| modules | C:  hadoop-common-project/hadoop-common   
hadoop-hdfs-project/hadoop-hdfs  U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14909/console |
| Powered by | Apache Yetus 0.2.0   http://yetus.apache.org |


This message was automatically generated.



> DFS Used space is not correct computed on frequent append operations
> --------------------------------------------------------------------
>
>                 Key: HDFS-6489
>                 URL: https://issues.apache.org/jira/browse/HDFS-6489
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.2.0, 2.7.1, 2.7.2
>            Reporter: stanley shi
>            Assignee: Weiwei Yang
>         Attachments: HDFS-6489.001.patch, HDFS6489.java
>
>
> The current implementation of the Datanode will increase the DFS used space 
> on each block write operation. This is correct in most scenario (create new 
> file), but sometimes it will behave in-correct(append small data to a large 
> block).
> For example, I have a file with only one block(say, 60M). Then I try to 
> append to it very frequently but each time I append only 10 bytes;
> Then on each append, dfs used will be increased with the length of the 
> block(60M), not teh actual data length(10bytes).
> Consider in a scenario I use many clients to append concurrently to a large 
> number of files (1000+), assume the block size is 32M (half of the default 
> value), then the dfs used will be increased 1000*32M = 32G on each append to 
> the files; but actually I only write 10K bytes; this will cause the datanode 
> to report in-sufficient disk space on data write.
> {quote}2014-06-04 15:27:34,719 INFO 
> org.apache.hadoop.hdfs.server.datanode.DataNode: opWriteBlock  
> BP-1649188734-10.37.7.142-1398844098971:blk_1073742834_45306 received 
> exception org.apache.hadoop.util.DiskChecker$DiskOutOfSpaceException: 
> Insufficient space for appending to FinalizedReplica, blk_1073742834_45306, 
> FINALIZED{quote}
> But the actual disk usage:
> {quote}
> [root@hdsh143 ~]# df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda3              16G  2.9G   13G  20% /
> tmpfs                 1.9G   72K  1.9G   1% /dev/shm
> /dev/sda1              97M   32M   61M  35% /boot
> {quote}



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