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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/10/25 05:30:01 UTC
[GitHub] [hadoop] haiyang1987 opened a new pull request, #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
haiyang1987 opened a new pull request, #5074:
URL: https://github.com/apache/hadoop/pull/5074
…mporary
### Description of PR
HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
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[GitHub] [hadoop] tomscut commented on pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
tomscut commented on PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#issuecomment-1294505590
Hi @Hexiaoqiao , could you please also take a look? Thanks.
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[GitHub] [hadoop] tomscut commented on a diff in pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
tomscut commented on code in PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#discussion_r1005118073
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java:
##########
@@ -1912,9 +1908,8 @@ public ReplicaHandler createTemporary(StorageType storageType,
return new ReplicaHandler(newReplicaInfo, ref);
} finally {
if (dataNodeMetrics != null) {
- // Create temporary operation hold write lock twice.
- long createTemporaryOpMs = Time.monotonicNow() - startHoldLockTimeMs
- + holdLockTimeMs;
+ // Create temporary operation hold write lock once.
+ long createTemporaryOpMs = Time.monotonicNow() - startHoldLockTimeMs;
Review Comment:
I think `createTemporaryOpMs` should be `Time.monotonicNow() - startTimeMs`;
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[GitHub] [hadoop] ZanderXu commented on pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
ZanderXu commented on PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#issuecomment-1294512682
I discussed with @haiyang1987 yesterday, this PR doesn't make sense. There are some bugs in the `createTemporary` method.
@haiyang1987 Will you modify this PR to describe and fix them?
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[GitHub] [hadoop] hadoop-yetus commented on pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#issuecomment-1293174907
:broken_heart: **-1 overall**
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[GitHub] [hadoop] haiyang1987 commented on pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
haiyang1987 commented on PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#issuecomment-1296974063
> I discussed with @haiyang1987 yesterday, this PR doesn't make sense. There are some bugs in the `createTemporary` method.
>
> @haiyang1987 Will you modify this PR to describe and fix them?
Sure, I will improve it later.
Thanks @ZanderXu @tomscut help to review.
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[GitHub] [hadoop] hadoop-yetus commented on pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#issuecomment-1290414892
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 12m 39s | | Docker mode activated. |
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| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files found. |
| +0 :ok: | codespell | 0m 1s | | codespell was not available. |
| +0 :ok: | detsecrets | 0m 1s | | detect-secrets 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 | 39m 54s | | trunk passed |
| +1 :green_heart: | compile | 1m 38s | | trunk passed with JDK Ubuntu-11.0.16+8-post-Ubuntu-0ubuntu120.04 |
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|||| _ Patch Compile Tests _ |
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[GitHub] [hadoop] haiyang1987 commented on a diff in pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
haiyang1987 commented on code in PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#discussion_r1006351748
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java:
##########
@@ -1912,9 +1908,8 @@ public ReplicaHandler createTemporary(StorageType storageType,
return new ReplicaHandler(newReplicaInfo, ref);
} finally {
if (dataNodeMetrics != null) {
- // Create temporary operation hold write lock twice.
- long createTemporaryOpMs = Time.monotonicNow() - startHoldLockTimeMs
- + holdLockTimeMs;
+ // Create temporary operation hold write lock once.
+ long createTemporaryOpMs = Time.monotonicNow() - startHoldLockTimeMs;
Review Comment:
@tomscut thanks for the help review.
Update PR, Please help review again.
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[GitHub] [hadoop] tomscut commented on a diff in pull request #5074: HDFS-16819. Remove the redundant write lock in FsDatasetImpl#createTemporary
Posted by GitBox <gi...@apache.org>.
tomscut commented on code in PR #5074:
URL: https://github.com/apache/hadoop/pull/5074#discussion_r1007672138
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java:
##########
@@ -1912,9 +1907,8 @@ public ReplicaHandler createTemporary(StorageType storageType,
return new ReplicaHandler(newReplicaInfo, ref);
} finally {
if (dataNodeMetrics != null) {
- // Create temporary operation hold write lock twice.
- long createTemporaryOpMs = Time.monotonicNow() - startHoldLockTimeMs
- + holdLockTimeMs;
+ // Create temporary operation hold write lock once.
Review Comment:
This comment can also be removed. The other changes look good to me.
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