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https://issues.apache.org/jira/browse/HDFS-10453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16287441#comment-16287441
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genericqa commented on HDFS-10453:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 18m
20s{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-2.7 Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 5m
54s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
1s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
24s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
0s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m
54s{color} | {color:green} branch-2.7 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
47s{color} | {color:green} branch-2.7 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
54s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
59s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m
59s{color} | {color:green} the patch passed {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} 0m
57s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red} 0m
0s{color} | {color:red} The patch has 60 line(s) that end in whitespace. Use
git apply --whitespace=fix <<patch_file>>. Refer
https://git-scm.com/docs/git-apply {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m
4s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
44s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}106m 9s{color}
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red} 1m
15s{color} | {color:red} The patch generated 1 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}148m 22s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| Unreaped Processes | hadoop-hdfs:25 |
| Failed junit tests | hadoop.hdfs.TestBlocksScheduledCounter |
| | hadoop.hdfs.TestListFilesInDFS |
| Timed out junit tests | org.apache.hadoop.hdfs.TestLeaseRecovery2 |
| | org.apache.hadoop.hdfs.TestDatanodeRegistration |
| | org.apache.hadoop.hdfs.TestDFSClientFailover |
| | org.apache.hadoop.hdfs.TestRead |
| | org.apache.hadoop.security.TestPermission |
| | org.apache.hadoop.hdfs.web.TestWebHdfsTokens |
| | org.apache.hadoop.hdfs.TestDFSInotifyEventInputStream |
| | org.apache.hadoop.hdfs.TestFileAppendRestart |
| | org.apache.hadoop.hdfs.TestReadWhileWriting |
| | org.apache.hadoop.hdfs.security.TestDelegationToken |
| | org.apache.hadoop.hdfs.TestDFSOutputStream |
| | org.apache.hadoop.hdfs.TestDFSMkdirs |
| | org.apache.hadoop.security.TestRefreshUserMappings |
| | 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.web.TestFSMainOperationsWebHdfs |
| | org.apache.hadoop.hdfs.TestDistributedFileSystem |
| | org.apache.hadoop.hdfs.web.TestWebHDFSForHA |
| | 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:67e87c9 |
| JIRA Issue | HDFS-10453 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12901616/HDFS-10453-branch-2.7.005.patch
|
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit shadedclient findbugs checkstyle |
| uname | Linux 40f6f64acae3 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-2.7 / a4dd069 |
| maven | version: Apache Maven 3.0.5 |
| Default Java | 1.7.0_151 |
| findbugs | v3.0.0 |
| whitespace |
https://builds.apache.org/job/PreCommit-HDFS-Build/22362/artifact/out/whitespace-eol.txt
|
| Unreaped Processes Log |
https://builds.apache.org/job/PreCommit-HDFS-Build/22362/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs-reaper.txt
|
| unit |
https://builds.apache.org/job/PreCommit-HDFS-Build/22362/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/22362/testReport/ |
| asflicense |
https://builds.apache.org/job/PreCommit-HDFS-Build/22362/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/22362/console |
| Powered by | Apache Yetus 0.7.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> ReplicationMonitor thread could stuck for long time due to the race between
> replication and delete of same file in a large cluster.
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-10453
> URL: https://issues.apache.org/jira/browse/HDFS-10453
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.4.1, 2.5.2, 2.7.1, 2.6.4
> Reporter: He Xiaoqiao
> Attachments: HDFS-10453-branch-2.001.patch,
> HDFS-10453-branch-2.003.patch, HDFS-10453-branch-2.7.004.patch,
> HDFS-10453-branch-2.7.005.patch, HDFS-10453.001.patch
>
>
> ReplicationMonitor thread could stuck for long time and loss data with little
> probability. Consider the typical scenarioļ¼
> (1) create and close a file with the default replicas(3);
> (2) increase replication (to 10) of the file.
> (3) delete the file while ReplicationMonitor is scheduling blocks belong to
> that file for replications.
> if ReplicationMonitor stuck reappeared, NameNode will print log as:
> {code:xml}
> 2016-04-19 10:20:48,083 WARN
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to
> place enough replicas, still in need of 7 to reach 10
> (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7,
> storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]},
> newBlock=false) For more information, please enable DEBUG log level on
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy
> ......
> 2016-04-19 10:21:17,184 WARN
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to
> place enough replicas, still in need of 7 to reach 10
> (unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7,
> storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]},
> newBlock=false) For more information, please enable DEBUG log level on
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy
> 2016-04-19 10:21:17,184 WARN
> org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough
> replicas: expected size is 7 but only 0 storage types can be selected
> (replication=10, selected=[], unavailable=[DISK, ARCHIVE], removed=[DISK,
> DISK, DISK, DISK, DISK, DISK, DISK], policy=BlockStoragePolicy{HOT:7,
> storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]})
> 2016-04-19 10:21:17,184 WARN
> org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to
> place enough replicas, still in need of 7 to reach 10
> (unavailableStorages=[DISK, ARCHIVE], storagePolicy=BlockStoragePolicy{HOT:7,
> storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]},
> newBlock=false) All required storage types are unavailable:
> unavailableStorages=[DISK, ARCHIVE], storagePolicy=BlockStoragePolicy{HOT:7,
> storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}
> {code}
> This is because 2 threads (#NameNodeRpcServer and #ReplicationMonitor)
> process same block at the same moment.
> (1) ReplicationMonitor#computeReplicationWorkForBlocks get blocks to
> replicate and leave the global lock.
> (2) FSNamesystem#delete invoked to delete blocks then clear the reference in
> blocksmap, needReplications, etc. the block's NumBytes will set
> NO_ACK(Long.MAX_VALUE) which is used to indicate that the block deletion does
> not need explicit ACK from the node.
> (3) ReplicationMonitor#computeReplicationWorkForBlocks continue to
> chooseTargets for the same blocks and no node will be selected after traverse
> whole cluster because no node choice satisfy the goodness criteria
> (remaining spaces achieve required size Long.MAX_VALUE).
> During of stage#3 ReplicationMonitor stuck for long time, especial in a large
> cluster. invalidateBlocks & neededReplications continues to grow and no
> consumes. it will loss data at the worst.
> This can mostly be avoided by skip chooseTarget for BlockCommand.NO_ACK block
> and remove it from neededReplications.
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