[ 
https://issues.apache.org/jira/browse/HDFS-13132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16360072#comment-16360072
 ] 

genericqa commented on HDFS-13132:
----------------------------------

| (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 
40s{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 6 new or modified test 
files. {color} |
|| || || || {color:brown} HDFS-7240 Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
40s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 35m 
34s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
28s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
24s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  4m 
24s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
23m  4s{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}  7m 
30s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  3m 
43s{color} | {color:green} HDFS-7240 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
22s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  4m 
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} cc {color} | {color:green}  4m 
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  4m 
21s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
1m 22s{color} | {color:orange} hadoop-hdfs-project: The patch generated 8 new + 
10 unchanged - 0 fixed = 18 total (was 10) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  4m 
10s{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} 
18m 50s{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}  8m 
14s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  3m 
34s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  3m  
8s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}139m  8s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
22s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}267m 11s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.ozone.web.client.TestKeysRatis |
|   | hadoop.ozone.ozShell.TestOzoneShell |
|   | hadoop.ozone.failure.TestRatisFailure |
|   | hadoop.ozone.container.ozoneimpl.TestOzoneContainer |
|   | hadoop.hdfs.TestReadStripedFileWithMissingBlocks |
|   | hadoop.ozone.web.TestLocalOzoneVolumes |
|   | hadoop.ozone.scm.TestXceiverClientManager |
|   | hadoop.hdfs.server.namenode.ha.TestRetryCacheWithHA |
|   | hadoop.ozone.client.rpc.TestOzoneRpcClient |
|   | hadoop.ozone.scm.TestSCMMXBean |
|   | hadoop.ozone.container.common.TestDatanodeStateMachine |
|   | hadoop.ozone.TestContainerOperations |
|   | hadoop.ozone.ksm.TestKSMSQLCli |
|   | hadoop.ozone.ksm.TestKeySpaceManager |
|   | hadoop.ozone.scm.TestXceiverClientMetrics |
|   | hadoop.hdfs.server.blockmanagement.TestBlockStatsMXBean |
|   | hadoop.ozone.failure.TestStandAloneFailure |
|   | hadoop.ozone.web.client.TestBuckets |
|   | hadoop.ozone.tools.TestCorona |
|   | hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting |
|   | hadoop.ozone.ksm.TestKSMMetrcis |
|   | hadoop.ozone.scm.TestContainerSmallFile |
|   | hadoop.ozone.web.client.TestKeys |
|   | hadoop.ozone.TestStorageContainerManager |
|   | hadoop.security.TestRefreshUserMappings |
|   | hadoop.ozone.web.client.TestVolume |
|   | hadoop.ozone.web.TestOzoneWebAccess |
\\
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:d11161b |
| JIRA Issue | HDFS-13132 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12910110/HDFS-13132-HDFS-7240.001.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  cc  |
| uname | Linux 4c141452f5b9 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 | HDFS-7240 / ea5c792 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_151 |
| findbugs | v3.1.0-RC1 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/23027/artifact/out/diff-checkstyle-hadoop-hdfs-project.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/23027/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/23027/testReport/ |
| Max. process+thread count | 3123 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client 
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/23027/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Ozone: Handle datanode failures in Storage Container Manager
> ------------------------------------------------------------
>
>                 Key: HDFS-13132
>                 URL: https://issues.apache.org/jira/browse/HDFS-13132
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Mukul Kumar Singh
>            Assignee: Mukul Kumar Singh
>            Priority: Major
>             Fix For: HDFS-7240
>
>         Attachments: HDFS-13132-HDFS-7240.001.patch
>
>
> Currently SCM receives heartbeat from the datanodes in the cluster receiving 
> container reports. Apart from this Ratis leader also receives the heartbeats 
> from the nodes in a Raft ring. The ratis heartbeats are at a smaller interval 
> (500 ms) whereas SCM heartbeats are at (30s), it is thereby considered safe 
> to assume that a datanode is really lost when SCM missed heartbeat from such 
> a node.
> The pipeline recovery will follow the following steps
> 1) As noted earlier, SCM will identify a dead DN via the heartbeats. Current 
> stale interval is (1.5m). Once a stale node has been identified, SCM will 
> find the list of containers for the pipelines the datanode was part of.
> 2) SCM sends close container command to the datanodes, note that at this 
> time, the Ratis ring has 2 nodes in the ring and consistency can still be 
> guaranteed by Ratis.
> 3) If another node dies before the close container command succeeded, then 
> ratis cannot guarantee consistency of the data being written/ close 
> container. The pipeline here will be marked in a inconsistent state.
> 4) Closed container will be replicated via the close container replication 
> protocol.
> If the dead datanode comes back, as part of the re-register command, SCM will 
> ask the Datanode to format all the open containers.
> 5) Return the healthy nodes back to the free node pool for the next pipeline 
> allocation
> 6) Read operation to close containers will succeed however read operation to 
> a open container on a single node cluster will be disallowed. It will only be 
> allowed under a special flag aka ReadInconsistentData flag.
> This jira will introduce the mechanism to identify and handle datanode 
> failure.
> However handling of a) 2 nodes simultaneously and b) Return the nodes to 
> healthy state c) allow inconsistent data reads and d) purging of open 
> container on a zombie node will be done as part of separate bugs.



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