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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2021/03/07 08:02:54 UTC
[GitHub] [hadoop] lamber-ken opened a new pull request #2751: HADOOP-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
lamber-ken opened a new pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751
## ISSUE
https://issues.apache.org/jira/browse/HDFS-15882
## NOTICE
- `rw` Open for reading and writing. If the file does not already exist then an attempt will be made to create it.
- `rws` Require that every update to the file's content or metadata be written synchronously to the underlying storage device.
From the literal meaning of this variable `shouldSyncWritesAndSkipFsync`, we should use `rws` when shouldSyncWritesAndSkipFsync is false.
We use SATA disk to store the journal node's data. It's not effective for improving RPC performance whether the `shouldSyncWritesAndSkipFsync` variable is true or false. it's caused by initializing RandomAccessFile incorrectly.
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[GitHub] [hadoop] Hexiaoqiao commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-797876193
The failed unit tests seems not related to this PR, committed to trunk. Thanks @lamberken for your report and contributions.
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[GitHub] [hadoop] leosunli commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
leosunli commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-792256266
LGTM
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[GitHub] [hadoop] lamber-ken edited a comment on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken edited a comment on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-795398380
After patching, the performance is nearly doubled.
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[GitHub] [hadoop] lamber-ken commented on pull request #2751: HADOOP-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-792235595
hi @aajisaka, please take a review when you're free, thanks.
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[GitHub] [hadoop] Hexiaoqiao commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-795423521
Sorry for late response, just check yetus report, I found there are many failed unit tests. Do you mind to trigger Yetus again?
BTW, application execution time is not the proper measure for this improvement IMO, just suggest to use `nnbench` or similar tools to check it. Thanks.
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[GitHub] [hadoop] Hexiaoqiao merged pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
Hexiaoqiao merged pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751
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[GitHub] [hadoop] lamber-ken commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-795398380
After patching, the performance is nearly doubled.
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[GitHub] [hadoop] hadoop-yetus commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-797604239
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 41s | | Docker mode activated. |
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| -1 :x: | test4tests | 0m 0s | | The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 38m 50s | | trunk passed |
| +1 :green_heart: | compile | 1m 38s | | trunk passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
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|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 17s | | the patch passed |
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| +1 :green_heart: | spotbugs | 3m 56s | | the patch passed |
| +1 :green_heart: | shadedclient | 21m 11s | | patch has no errors when building and testing our client artifacts. |
|||| _ Other Tests _ |
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| +1 :green_heart: | asflicense | 0m 37s | | The patch does not generate ASF License warnings. |
| | | 341m 34s | | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests | hadoop.hdfs.server.namenode.snapshot.TestNestedSnapshots |
| | hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks |
| | hadoop.fs.viewfs.TestViewFSOverloadSchemeWithMountTableConfigInHDFS |
| | hadoop.hdfs.server.datanode.TestDirectoryScanner |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2751/7/artifact/out/Dockerfile |
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| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell |
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| Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2751/7/testReport/ |
| Max. process+thread count | 3047 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs |
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| 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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[GitHub] [hadoop] lamber-ken commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-792305475
I think the test failures are not related to the patch.
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[GitHub] [hadoop] lamber-ken commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-795527785
> use `nnbench` or similar tools to check it. Thanks.
Yeah, we use `nnbench` tool
```
hadoop dfs -rm -r /tmp/nnbench
hadoop jar hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.2.0-tests.jar nnbench \
-Ddfs.checksum.type=NULL \
-operation create_write -maps 200 -reduces 15 \
-bytesToWrite 1 -numberOfFiles 5000 \
-blockSize 1048576 -replicationFactorPerFile 3 \
-readFileAfterOpen true -baseDir /tmp/nnbench
```
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[GitHub] [hadoop] hadoop-yetus commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-797600162
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 1m 19s | | 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 :x: | test4tests | 0m 0s | | The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 38m 5s | | trunk passed |
| +1 :green_heart: | compile | 1m 23s | | trunk passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
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|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 13s | | the patch passed |
| +1 :green_heart: | compile | 1m 17s | | the patch passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | javac | 1m 17s | | the patch passed |
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| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks issues. |
| +1 :green_heart: | checkstyle | 0m 56s | | the patch passed |
| +1 :green_heart: | mvnsite | 1m 17s | | the patch passed |
| +1 :green_heart: | javadoc | 0m 52s | | the patch passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
| +1 :green_heart: | javadoc | 1m 26s | | the patch passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| +1 :green_heart: | spotbugs | 3m 33s | | the patch passed |
| +1 :green_heart: | shadedclient | 19m 39s | | patch has no errors when building and testing our client artifacts. |
|||| _ Other Tests _ |
| -1 :x: | unit | 341m 26s | [/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2751/6/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt) | hadoop-hdfs in the patch passed. |
| +1 :green_heart: | asflicense | 0m 41s | | The patch does not generate ASF License warnings. |
| | | 440m 24s | | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests | hadoop.hdfs.server.namenode.TestDecommissioningStatus |
| | hadoop.hdfs.TestDFSShell |
| | hadoop.hdfs.server.namenode.TestDecommissioningStatusWithBackoffMonitor |
| | hadoop.hdfs.tools.TestDFSZKFailoverController |
| | hadoop.hdfs.server.namenode.ha.TestBootstrapStandby |
| | hadoop.hdfs.server.datanode.TestDirectoryScanner |
| | hadoop.hdfs.server.namenode.ha.TestEditLogTailer |
| | hadoop.hdfs.TestHDFSFileSystemContract |
| | hadoop.hdfs.TestPersistBlocks |
| | hadoop.fs.viewfs.TestViewFileSystemOverloadSchemeHdfsFileSystemContract |
| | hadoop.hdfs.server.namenode.snapshot.TestNestedSnapshots |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2751/6/artifact/out/Dockerfile |
| GITHUB PR | https://github.com/apache/hadoop/pull/2751 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell |
| uname | Linux 828f0a5da9fd 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
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| Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2751/6/testReport/ |
| Max. process+thread count | 2092 (vs. ulimit of 5500) |
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| Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2751/6/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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[GitHub] [hadoop] lamber-ken edited a comment on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken edited a comment on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-795527785
> use `nnbench` or similar tools to check it. Thanks.
Yeah, we use `nnbench` tool to test `create_write`.
```
hadoop dfs -rm -r /tmp/nnbench
hadoop jar hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.2.0-tests.jar nnbench \
-Ddfs.checksum.type=NULL \
-operation create_write -maps 200 -reduces 15 \
-bytesToWrite 1 -numberOfFiles 5000 \
-blockSize 1048576 -replicationFactorPerFile 3 \
-readFileAfterOpen true -baseDir /tmp/nnbench
```
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[GitHub] [hadoop] lamber-ken edited a comment on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken edited a comment on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-792305475
I think the test failures are not related to the patch, and the failed tests succeeded on my local computer.
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[GitHub] [hadoop] lamber-ken commented on pull request #2751: HDFS-15882. Fix incorrectly initializing RandomAccessFile based on configuration options
Posted by GitBox <gi...@apache.org>.
lamber-ken commented on pull request #2751:
URL: https://github.com/apache/hadoop/pull/2751#issuecomment-792259640
Thanks @Hexiaoqiao @leosunli
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