[
https://issues.apache.org/jira/browse/HDFS-16521?focusedWorklogId=765310&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-765310
]
ASF GitHub Bot logged work on HDFS-16521:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 03/May/22 07:35
Start Date: 03/May/22 07:35
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on PR #4259:
URL: https://github.com/apache/hadoop/pull/4259#issuecomment-1115816832
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 10m 33s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 1s | | codespell was not available. |
| +0 :ok: | buf | 0m 1s | | buf was not available. |
| +0 :ok: | markdownlint | 0m 1s | | markdownlint 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 3 new or modified test files. |
|||| _ branch-3.3 Compile Tests _ |
| +0 :ok: | mvndep | 15m 46s | | Maven dependency ordering for branch |
| +1 :green_heart: | mvninstall | 27m 8s | | branch-3.3 passed |
| +1 :green_heart: | compile | 4m 2s | | branch-3.3 passed |
| +1 :green_heart: | checkstyle | 1m 18s | | branch-3.3 passed |
| +1 :green_heart: | mvnsite | 3m 28s | | branch-3.3 passed |
| +1 :green_heart: | javadoc | 3m 34s | | branch-3.3 passed |
| +1 :green_heart: | spotbugs | 7m 46s | | branch-3.3 passed |
| +1 :green_heart: | shadedclient | 26m 29s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +0 :ok: | mvndep | 0m 29s | | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 2m 51s | | the patch passed |
| +1 :green_heart: | compile | 3m 46s | | the patch passed |
| +1 :green_heart: | cc | 3m 46s | | the patch passed |
| -1 :x: | javac | 3m 46s |
[/results-compile-javac-hadoop-hdfs-project.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4259/1/artifact/out/results-compile-javac-hadoop-hdfs-project.txt)
| hadoop-hdfs-project generated 1 new + 746 unchanged - 0 fixed = 747 total
(was 746) |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 1m 2s | | hadoop-hdfs-project: The
patch generated 0 new + 470 unchanged - 1 fixed = 470 total (was 471) |
| +1 :green_heart: | mvnsite | 2m 54s | | the patch passed |
| +1 :green_heart: | javadoc | 2m 54s | | the patch passed |
| +1 :green_heart: | spotbugs | 7m 37s | | the patch passed |
| +1 :green_heart: | shadedclient | 26m 2s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 2m 16s | | hadoop-hdfs-client in the patch
passed. |
| -1 :x: | unit | 207m 47s |
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4259/1/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
| hadoop-hdfs in the patch passed. |
| -1 :x: | unit | 15m 57s |
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs-rbf.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4259/1/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs-rbf.txt)
| hadoop-hdfs-rbf in the patch passed. |
| +1 :green_heart: | asflicense | 0m 58s | | The patch does not
generate ASF License warnings. |
| | | 376m 41s | | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests | hadoop.hdfs.server.datanode.TestBPOfferService |
| | hadoop.cli.TestHDFSCLI |
| | hadoop.hdfs.TestRollingUpgrade |
| | hadoop.hdfs.server.datanode.TestDataNodeRollingUpgrade |
| | hadoop.hdfs.server.federation.router.TestRouterRpc |
| | hadoop.hdfs.server.federation.security.TestRouterSecurityManager |
| | hadoop.hdfs.server.federation.router.TestRouterRpcMultiDestination |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4259/1/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/4259 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell cc buflint bufcompat
markdownlint |
| uname | Linux 1a4d0d83a476 4.15.0-175-generic #184-Ubuntu SMP Thu Mar 24
17:48:36 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | branch-3.3 / ae723bc98f8411715b9d8a23125d63f79ff096a2 |
| Default Java | Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4259/1/testReport/ |
| Max. process+thread count | 2050 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client
hadoop-hdfs-project/hadoop-hdfs hadoop-hdfs-project/hadoop-hdfs-rbf U:
hadoop-hdfs-project |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4259/1/console |
| versions | git=2.17.1 maven=3.6.0 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
This message was automatically generated.
Issue Time Tracking
-------------------
Worklog Id: (was: 765310)
Time Spent: 6h (was: 5h 50m)
> DFS API to retrieve slow datanodes
> ----------------------------------
>
> Key: HDFS-16521
> URL: https://issues.apache.org/jira/browse/HDFS-16521
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Time Spent: 6h
> Remaining Estimate: 0h
>
> Providing DFS API to retrieve slow nodes would help add an additional option
> to "dfsadmin -report" that lists slow datanodes info for operators to take a
> look, specifically useful filter for larger clusters.
> The other purpose of such API is for HDFS downstreamers without direct access
> to namenode http port (only rpc port accessible) to retrieve slownodes.
> Moreover,
> [FanOutOneBlockAsyncDFSOutput|https://github.com/apache/hbase/blob/master/hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutput.java]
> in HBase currently has to rely on it's own way of marking and excluding slow
> nodes while 1) creating pipelines and 2) handling ack, based on factors like
> the data length of the packet, processing time with last ack timestamp,
> whether flush to replicas is finished etc. If it can utilize slownode API
> from HDFS to exclude nodes appropriately while writing block, a lot of it's
> own post-ack computation of slow nodes can be _saved_ or _improved_ or based
> on further experiment, we could find _better solution_ to manage slow node
> detection logic both in HDFS and HBase. However, in order to collect more
> data points and run more POC around this area, HDFS should provide API for
> downstreamers to efficiently utilize slownode info for such critical
> low-latency use-case (like writing WALs).
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