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https://issues.apache.org/jira/browse/HDFS-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16308047#comment-16308047
 ] 

genericqa commented on HDFS-6804:
---------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 13m 
42s{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} branch-2.8 Compile Tests {color} ||
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  3m 
48s{color} | {color:red} root in branch-2.8 failed. {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
53s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
23s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
59s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  
8s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
6s{color} | {color:green} branch-2.8 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
52s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
50s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  0m 50s{color} 
| {color:red} hadoop-hdfs-project_hadoop-hdfs generated 1 new + 49 unchanged - 
0 fixed = 50 total (was 49) {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
22s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
3s{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} findbugs {color} | {color:green}  2m 
27s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  
7s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 75m 54s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  1m  
7s{color} | {color:red} The patch generated 400 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}108m 32s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Unreaped Processes | hadoop-hdfs:17 |
| Failed junit tests | hadoop.hdfs.TestReplaceDatanodeOnFailure |
|   | hadoop.hdfs.TestSafeMode |
|   | hadoop.hdfs.TestHdfsAdmin |
|   | hadoop.hdfs.crypto.TestHdfsCryptoStreams |
|   | hadoop.hdfs.TestSetrepDecreasing |
| Timed out junit tests | org.apache.hadoop.hdfs.TestLeaseRecovery2 |
|   | org.apache.hadoop.hdfs.TestReservedRawPaths |
|   | org.apache.hadoop.hdfs.TestDatanodeDeath |
|   | org.apache.hadoop.hdfs.TestPread |
|   | org.apache.hadoop.hdfs.TestDFSFinalize |
|   | org.apache.hadoop.hdfs.TestDatanodeLayoutUpgrade |
|   | org.apache.hadoop.hdfs.TestEncryptionZonesWithKMS |
|   | org.apache.hadoop.hdfs.protocol.datatransfer.sasl.TestSaslDataTransfer |
|   | org.apache.hadoop.hdfs.TestBlockStoragePolicy |
|   | org.apache.hadoop.hdfs.TestEncryptedTransfer |
|   | org.apache.hadoop.hdfs.TestClientReportBadBlock |
|   | org.apache.hadoop.hdfs.TestAbandonBlock |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:c2d96dd |
| JIRA Issue | HDFS-6804 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12904211/HDFS-6804-branch-2.8-002.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 08c01742b211 3.13.0-129-generic #178-Ubuntu SMP Fri Aug 11 
12:48:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | branch-2.8 / 19f518d |
| maven | version: Apache Maven 3.0.5 |
| Default Java | 1.7.0_151 |
| mvninstall | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/artifact/out/branch-mvninstall-root.txt
 |
| findbugs | v3.0.0 |
| javac | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/artifact/out/diff-compile-javac-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| Unreaped Processes Log | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs-reaper.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/artifact/out/patch-asflicense-problems.txt
 |
| Max. process+thread count | 4938 (vs. ulimit of 5000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22528/console |
| Powered by | Apache Yetus 0.7.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> race condition between transferring block and appending block causes 
> "Unexpected checksum mismatch exception" 
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6804
>                 URL: https://issues.apache.org/jira/browse/HDFS-6804
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.2.0
>            Reporter: Gordon Wang
>            Assignee: Brahma Reddy Battula
>         Attachments: HDFS-6804-branch-2.8-002.patch, 
> HDFS-6804-branch-2.8.patch, Testcase_append_transfer_block.patch
>
>
> We found some error log in the datanode. like this
> {noformat}
> 2014-07-22 01:49:51,338 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: 
> Ex
> ception for BP-2072804351-192.168.2.104-1406008383435:blk_1073741997_9248
> java.io.IOException: Terminating due to a checksum error.java.io.IOException: 
> Unexpected checksum mismatch while writing 
> BP-2072804351-192.168.2.104-1406008383435:blk_1073741997_9248 from 
> /192.168.2.101:39495
>         at 
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:536)
>         at 
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:703)
>         at 
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:575)
>         at 
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:115)
>         at 
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:68)
>         at 
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:221)
>         at java.lang.Thread.run(Thread.java:744)
> {noformat}
> While on the source datanode, the log says the block is transmitted.
> {noformat}
> 2014-07-22 01:49:50,805 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: 
> Da
> taTransfer: Transmitted 
> BP-2072804351-192.168.2.104-1406008383435:blk_1073741997
> _9248 (numBytes=16188152) to /192.168.2.103:50010
> {noformat}
> When the destination datanode gets the checksum mismatch, it reports bad 
> block to NameNode and NameNode marks the replica on the source datanode as 
> corrupt. But actually, the replica on the source datanode is valid. Because 
> the replica can pass the checksum verification.
> In all, the replica on the source data is wrongly marked as corrupted.



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