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Date: Wed, 3 Jan 2018 17:18:01 +0000 (UTC)
From: "genericqa (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12731269.1406871443000.565649.1514999881532@Atlassian.JIRA>
In-Reply-To: <JIRA.12731269.1406871443000@Atlassian.JIRA>
References: <JIRA.12731269.1406871443000@Atlassian.JIRA> <JIRA.12731269.1406871443782@jira-lw-us.apache.org>
Subject: [jira] [Commented] (HDFS-6804) race condition between transferring
 block and appending block causes "Unexpected checksum mismatch exception"
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archived-at: Wed, 03 Jan 2018 17:18:08 -0000


    [ https://issues.apache.org/jira/browse/HDFS-6804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16309934#comment-16309934 ] 

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} 17m 16s{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:green}+1{color} | {color:green} mvninstall {color} | {color:green}  6m 53s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 47s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 24s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 54s{color} | {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  9s{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 50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 45s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 45s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 54s{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 15s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  2s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}107m 33s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  1m 18s{color} | {color:red} The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}146m 16s{color} | {color:black} {color} |
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|| Reason || Tests ||
| Unreaped Processes | hadoop-hdfs:26 |
| Failed junit tests | hadoop.hdfs.TestWriteConfigurationToDFS |
|   | hadoop.hdfs.TestDFSRollback |
|   | hadoop.hdfs.TestSetrepIncreasing |
|   | hadoop.hdfs.TestTrashWithSecureEncryptionZones |
|   | hadoop.hdfs.TestBalancerBandwidth |
|   | hadoop.hdfs.TestDFSClientRetries |
| Timed out junit tests | org.apache.hadoop.hdfs.TestLeaseRecovery2 |
|   | org.apache.hadoop.hdfs.TestDatanodeRegistration |
|   | org.apache.hadoop.hdfs.TestBlocksScheduledCounter |
|   | org.apache.hadoop.hdfs.TestDFSClientFailover |
|   | org.apache.hadoop.hdfs.TestListFilesInDFS |
|   | org.apache.hadoop.hdfs.web.TestWebHdfsTokens |
|   | org.apache.hadoop.hdfs.TestDatanodeLayoutUpgrade |
|   | org.apache.hadoop.hdfs.TestFileAppendRestart |
|   | org.apache.hadoop.hdfs.web.TestWebHdfsWithRestCsrfPreventionFilter |
|   | org.apache.hadoop.hdfs.TestSeekBug |
|   | org.apache.hadoop.hdfs.TestDFSMkdirs |
|   | org.apache.hadoop.hdfs.TestDatanodeReport |
|   | org.apache.hadoop.hdfs.web.TestWebHDFS |
|   | org.apache.hadoop.hdfs.web.TestWebHDFSXAttr |
|   | org.apache.hadoop.hdfs.web.TestWebHdfsWithMultipleNameNodes |
|   | org.apache.hadoop.hdfs.TestMiniDFSCluster |
|   | org.apache.hadoop.hdfs.TestDistributedFileSystem |
|   | org.apache.hadoop.hdfs.web.TestWebHDFSForHA |
|   | org.apache.hadoop.hdfs.TestTrashWithEncryptionZones |
|   | org.apache.hadoop.hdfs.TestSetTimes |
|   | org.apache.hadoop.hdfs.TestReplaceDatanodeFailureReplication |
|   | org.apache.hadoop.hdfs.TestDFSShell |
|   | org.apache.hadoop.hdfs.web.TestWebHDFSAcl |
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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/12904410/HDFS-6804-branch-2.8-003.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 7a9ae630a9dc 3.13.0-135-generic #184-Ubuntu SMP Wed Oct 18 11:55:51 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 |
| findbugs | v3.0.0 |
| Unreaped Processes Log | https://builds.apache.org/job/PreCommit-HDFS-Build/22544/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs-reaper.txt |
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/22544/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt |
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/22544/testReport/ |
| asflicense | https://builds.apache.org/job/PreCommit-HDFS-Build/22544/artifact/out/patch-asflicense-problems.txt |
| Max. process+thread count | 4898 (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/22544/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-2.8-003.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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