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https://issues.apache.org/jira/browse/HDFS-16214?focusedWorklogId=709285&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-709285
]
ASF GitHub Bot logged work on HDFS-16214:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Jan/22 20:12
Start Date: 14/Jan/22 20:12
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #3885:
URL: https://github.com/apache/hadoop/pull/3885#issuecomment-1013442737
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 1m 0s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 0s | | codespell 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 1 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 32m 34s | | trunk passed |
| +1 :green_heart: | compile | 1m 27s | | trunk passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | compile | 1m 22s | | trunk passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | checkstyle | 1m 3s | | trunk passed |
| +1 :green_heart: | mvnsite | 1m 29s | | trunk passed |
| +1 :green_heart: | javadoc | 1m 1s | | trunk passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | javadoc | 1m 32s | | trunk passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | spotbugs | 3m 11s | | trunk passed |
| +1 :green_heart: | shadedclient | 22m 21s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 14s | | the patch passed |
| +1 :green_heart: | compile | 1m 17s | | the patch passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | javac | 1m 17s | | the patch passed |
| +1 :green_heart: | compile | 1m 10s | | the patch passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | javac | 1m 10s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 0m 51s | | the patch passed |
| +1 :green_heart: | mvnsite | 1m 18s | | the patch passed |
| +1 :green_heart: | javadoc | 0m 50s | | the patch passed with JDK
Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | javadoc | 1m 27s | | the patch passed with JDK
Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| +1 :green_heart: | spotbugs | 3m 10s | | the patch passed |
| +1 :green_heart: | shadedclient | 22m 0s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 373m 2s | | hadoop-hdfs in the patch
passed. |
| +1 :green_heart: | asflicense | 0m 45s | | The patch does not
generate ASF License warnings. |
| | | 471m 51s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3885/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/3885 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell |
| uname | Linux 69c0b6f13276 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / efaeb849105015d3045f1d1635c16d2f33cb54a2 |
| Default Java | Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3885/2/testReport/ |
| Max. process+thread count | 3002 (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-3885/2/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
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Issue Time Tracking
-------------------
Worklog Id: (was: 709285)
Time Spent: 0.5h (was: 20m)
> Lock optimization for large deleteing, no locks on the collection block
> -----------------------------------------------------------------------
>
> Key: HDFS-16214
> URL: https://issues.apache.org/jira/browse/HDFS-16214
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 3.4.0
> Reporter: Xiangyi Zhu
> Assignee: Xiangyi Zhu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The time-consuming deletion is mainly reflected in three logics , collecting
> blocks, deleting Inode from InodeMap, and deleting blocks. The current
> deletion is divided into two major steps. Step 1 acquires the lock, collects
> the block and inode, deletes the inode, and releases the lock. Step 2 Acquire
> the lock and delete the block to release the lock.
> Phase 2 is currently deleting blocks in batches, which can control the lock
> holding time. Here we can also delete blocks asynchronously.
> Now step 1 still has the problem of holding the lock for a long time.
> For stage 1, we can make the collection block not hold the lock. The process
> is as follows, step 1 obtains the lock, parent.removeChild, writes to
> editLog, releases the lock. Step 2 no lock, collects the block. Step 3
> acquire lock, update quota, release lease, release lock. Step 4 acquire lock,
> delete Inode from InodeMap, release lock. Step 5 acquire lock, delete block
> to release lock.
> There may be some problems following the above process:
> 1. When the /a/b/c file is writing, then delete the /a/b directory. If the
> deletion is performed to the collecting block stage, the client writes
> complete or addBlock to the /a/b/c file at this time. This step is not locked
> and delete /a/b and editLog has been written successfully. In this case, the
> order of editLog is delete /a/c and complete /a/b/c. In this case, the
> standby node playback editLog /a/b/c file has been deleted, and then go to
> complete /a/b/c file will be abnormal.
> *The process is as follows:*
> *write editLog order: delete /a/b/c -> delete /a/b -> complete /a/b/c*
> *replay editLog order:* *delete /a/b/c ->* *delete /a/b ->* *complete /a/b/c
> {color:#ff0000}(not found){color}*
> 2. If a delete operation is executed to the stage of collecting block, then
> the administrator executes saveNameSpace, and then restarts Namenode. This
> situation may cause the Inode that has been deleted from the parent childList
> to remain in the InodeMap.
> To solve the above problem, in step 1, add the inode being deleted to the
> Set. When there is a file WriteFileOp (logAllocateBlockId/logCloseFile
> EditLog), check whether there is this file and one of its parent Inodes in
> the Set, and throw it if there is. An exception FileNotFoundException
> occurred.
> In addition, the execution of saveNamespace needs to wait for all iNodes in
> Set to be removed before execution.
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