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https://issues.apache.org/jira/browse/HDFS-17569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17868903#comment-17868903
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ASF GitHub Bot commented on HDFS-17569:
---------------------------------------
hadoop-yetus commented on PR #6924:
URL: https://github.com/apache/hadoop/pull/6924#issuecomment-2252322039
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 25s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +0 :ok: | detsecrets | 0m 0s | | detect-secrets was not available.
|
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
any @author tags. |
| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to
include 5 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 36m 18s | | trunk passed |
| +1 :green_heart: | compile | 0m 42s | | trunk passed with JDK
Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2 |
| +1 :green_heart: | compile | 0m 42s | | trunk passed with JDK
Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08 |
| +1 :green_heart: | checkstyle | 0m 42s | | trunk passed |
| +1 :green_heart: | mvnsite | 0m 45s | | trunk passed |
| +1 :green_heart: | javadoc | 0m 43s | | trunk passed with JDK
Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2 |
| +1 :green_heart: | javadoc | 1m 13s | | trunk passed with JDK
Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08 |
| +1 :green_heart: | spotbugs | 1m 59s | | trunk passed |
| +1 :green_heart: | shadedclient | 26m 8s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 0m 37s | | the patch passed |
| +1 :green_heart: | compile | 0m 41s | | the patch passed with JDK
Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2 |
| +1 :green_heart: | javac | 0m 41s | | the patch passed |
| +1 :green_heart: | compile | 0m 35s | | the patch passed with JDK
Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08 |
| +1 :green_heart: | javac | 0m 35s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| -0 :warning: | checkstyle | 0m 33s |
[/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6924/15/artifact/out/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt)
| hadoop-hdfs-project/hadoop-hdfs: The patch generated 18 new + 222 unchanged
- 0 fixed = 240 total (was 222) |
| +1 :green_heart: | mvnsite | 0m 44s | | the patch passed |
| +1 :green_heart: | javadoc | 0m 31s | | the patch passed with JDK
Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2 |
| +1 :green_heart: | javadoc | 1m 10s | | the patch passed with JDK
Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08 |
| +1 :green_heart: | spotbugs | 1m 55s | | the patch passed |
| +1 :green_heart: | shadedclient | 25m 54s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| -1 :x: | unit | 207m 37s |
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6924/15/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
| hadoop-hdfs in the patch passed. |
| -1 :x: | asflicense | 0m 31s |
[/results-asflicense.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6924/15/artifact/out/results-asflicense.txt)
| The patch generated 1 ASF License warnings. |
| | | 309m 39s | | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests |
hadoop.hdfs.TestErasureCodingPoliciesWithRandomECPolicy |
| | hadoop.hdfs.server.namenode.TestNamenodeCapacityReport |
| | hadoop.hdfs.TestErasureCodingPolicies |
| | hadoop.hdfs.server.namenode.TestRefreshBlockPlacementPolicy |
| | hadoop.hdfs.TestErasureCodingMultipleRacks |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.46 ServerAPI=1.46 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6924/15/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/6924 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
| uname | Linux a20b271d1e83 5.15.0-106-generic #116-Ubuntu SMP Wed Apr 17
09:17:56 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 784f5e387a79de98f8e3614daa405abcbd32a19a |
| Default Java | Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_412-8u412-ga-1~20.04.1-b08 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6924/15/testReport/ |
| Max. process+thread count | 3950 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U:
hadoop-hdfs-project/hadoop-hdfs |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6924/15/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
This message was automatically generated.
> Setup Effective Work Number when Generating Block Reconstruction Work
> ---------------------------------------------------------------------
>
> Key: HDFS-17569
> URL: https://issues.apache.org/jira/browse/HDFS-17569
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: wuchang
> Priority: Major
> Labels: pull-request-available
>
> h1. Description of PR
> The *{{RedundancyMonitor}}* is a Daemon which will sleep *3s* for each tick.
> In {{{}*computeBlockReconstructionWork(int blocksToProcess)*{}}}, it will use
> *{{chooseLowRedundancyBlocks()}}* to firstly find the candidate
> low-redundancy blocks(the max number is parameter *{{blocksToProcess}}* ) and
> then use {{*computeReconstructionWorkForBlocks()*}} to compute the
> reconstruction.
> But in some cases, the candidate low-redundancy blocks will be skipped for
> reconstruction scheduling for different reasons(source unavailable, target
> not found, validation failed, etc), but some other low-priority blocks which
> is able for reconstruction has to wait for many other rounds before scheduled.
> h1. How it happened in my case
> In my case, I have a 7 datanodes cluster({{{}a1 ~ a5{}}}, {{{}b1 ~ b2{}}}))
> and I want to add a new datanode {{b3}} to it and at the same time
> decommission {{{}a1 ~ a5{}}}.
> I find that the decommission takes one week to finish(less than 10000 blocks
> on each node). and I find below logs:
> {code:java}
> 2024-07-02 03:14:48,166 DEBUG
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: Block
> blk_1073806598_65774 cannot be reconstructed from any node
> 2024-07-02 03:14:48,166 DEBUG
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: Block
> blk_1073806599_65775 cannot be reconstructed from any node
> 2024-07-02 03:14:48,166 DEBUG
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: Block
> blk_1073806600_65776 cannot be reconstructed from any node
> 2024-07-02 03:14:48,166 DEBUG
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: Block
> blk_1073806603_65779 cannot be reconstructed from any node{code}
> These blocks cannot be scheduled for reconstruction, but used up the quota
> ({{{}blocksToProcess{}}}) in each tick, delayed the replicas on the
> decommissioning nodes to be scheduled for reconstruction, thus the
> decommission becomes very long-tail.
>
> h1. My Solution:
> So my solution is, when we meet the low-redundancy blocks to be skipped for
> reconstruction, move fast-forward inside current tick to check other
> low-redundancy blocks to schedule reconstruction for them.
> Of course, the total number of blocks scheduled for reconstruction
> successfully will be restricted by parameter {*}blocksToProcess{*}.
>
>
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