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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2021/07/13 16:02:29 UTC

[GitHub] [hadoop] amahussein opened a new pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

amahussein opened a new pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200


   
    - Backporting HDFS-15160 to branch-3.2
      - First: [HDFS-15150. Introduce read write lock to Datanode. Contributed Stephen O'Donnell](https://issues.apache.org/jira/browse/HDFS-15150)
        - `git cherry-pick -x d7c136b9ed6d99e1b03f5b89723b3a20df359ba8`
        - main conflicts:
          - `FsDatasetImpl.java.deepCopyReplica`
          - `FoldedTreeSet` is not used in branch-3.2
        - testing:
          - ```
            mvn test -Dtest=TestWriteToReplica,TestReplicaMap,\
                    TestProvidedImpl,TestFsVolumeList,TestInterDatanodeProtocol
            ```
      - Second: [HDFS-15160](https://issues.apache.org/jira/browse/HDFS-15160)
        - `git cherry-pick -x 2a67e2b1a0e3a5f91056f5b977ef9c4c07ba6718`
        - main conflicts:
          - `ReplicaMap.java`
          - `FsDatasetImpl.java.deepCopyReplica`
          - `FsDatasetImpl.java.addVolume` different code. I passed the red and write locks to `tempVolumeMap`
          - `DirectoryScanner.scan()` conflict in the entire loop.
             - [HDFS-15415. Reduce locking in Datanode DirectoryScanner](https://issues.apache.org/jira/browse/HDFS-15415) Which is already committed to branch-2.10 removes what [HDFS-15160](https://issues.apache.org/jira/browse/HDFS-15160) has added. So, I skipped that.
       - Third: [HDFS-15457. TestFsDatasetImpl fails intermittently (#2407)](https://issues.apache.org/jira/browse/HDFS-15457) and [HDFS-15818. Fix TestFsDatasetImpl.testReadLockCanBeDisabledByConfig (#2679)](https://issues.apache.org/jira/browse/HDFS-15818)
         - `git cherry-pick -x 98097b8f19789605b9697f6a959da57261e0fe19 9434c1eccc255a25ea5e11f6d8c9e1f83996d6b4`
         - main conflicts:
           - Java imports


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-918879503


   Committed to branch-3.2.3.
   cherry-pick to branch-3.2.3, build at local and run related unit tests passed.


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-906060946


   Thanks @amahussein for your works. I trigger Yetus and it seems works well. Failed unit test `TestDirectoryScanner ` looks not related to changes. AND verify this feature with pseudo cluster, it also seems work well.
   Just notice that this PR include different cherry-pick commits together. I am not sure if it is traced gracefully when check in.
   @brahmareddybattula  do you have any idea here? If not I would like give my +1.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-910738631


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Patch Compile Tests _ |
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   |  |   | 323m 19s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.ha.TestZKFailoverController |
   |   | hadoop.hdfs.server.namenode.TestAddOverReplicatedStripedBlocks |
   |   | hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks |
   |   | hadoop.hdfs.server.namenode.TestFsck |
   
   
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[GitHub] [hadoop] amahussein commented on a change in pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on a change in pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#discussion_r703761237



##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
##########
@@ -201,16 +201,16 @@ public Block getStoredBlock(String bpid, long blkid)
    * The deepCopyReplica call doesn't use the datasetock since it will lead the
    * potential deadlock with the {@link FsVolumeList#addBlockPool} call.
    */
+  @SuppressWarnings("unchecked")
   @Override
   public Set<? extends Replica> deepCopyReplica(String bpid)
       throws IOException {
-    Set<? extends Replica> replicas = null;
+    Set<? extends Replica> replicas;

Review comment:
       Thanks @brahmareddybattula 
   I think we can apply some changes to trunk given that the type casting is unchecked and causes some Javac warnings.
   Perhaps we can file another refactoring jira to address these issues on trunk.




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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909552788


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Patch Compile Tests _ |
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   |||| _ Other Tests _ |
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   |  |   | 316m 39s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.hdfs.server.namenode.ha.TestHAAppend |
   |   | hadoop.hdfs.server.datanode.TestDirectoryScanner |
   
   
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[GitHub] [hadoop] Hexiaoqiao merged pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao merged pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200


   


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[GitHub] [hadoop] amahussein edited a comment on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein edited a comment on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909634740


   After rebasing, it looks like there are javac checks added to the build that failed it.
   Although this is a part of the original code, I decided to address it so that we can pass the build and move forward with the PR.
   I also tested the TestDirectoryScanner and It passed.


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[GitHub] [hadoop] brahmareddybattula commented on a change in pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
brahmareddybattula commented on a change in pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#discussion_r702617962



##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
##########
@@ -201,16 +201,16 @@ public Block getStoredBlock(String bpid, long blkid)
    * The deepCopyReplica call doesn't use the datasetock since it will lead the
    * potential deadlock with the {@link FsVolumeList#addBlockPool} call.
    */
+  @SuppressWarnings("unchecked")
   @Override
   public Set<? extends Replica> deepCopyReplica(String bpid)
       throws IOException {
-    Set<? extends Replica> replicas = null;
+    Set<? extends Replica> replicas;

Review comment:
       can this change relate to trunk also..?  Even this can be emptyset




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[GitHub] [hadoop] brahmareddybattula commented on a change in pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
brahmareddybattula commented on a change in pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#discussion_r707624080



##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
##########
@@ -201,16 +201,16 @@ public Block getStoredBlock(String bpid, long blkid)
    * The deepCopyReplica call doesn't use the datasetock since it will lead the
    * potential deadlock with the {@link FsVolumeList#addBlockPool} call.
    */
+  @SuppressWarnings("unchecked")
   @Override
   public Set<? extends Replica> deepCopyReplica(String bpid)
       throws IOException {
-    Set<? extends Replica> replicas = null;
+    Set<? extends Replica> replicas;

Review comment:
       can please raise jira to track this..?




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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909105949


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Prechecks _ |
   | +1 :green_heart: |  dupname  |   0m  1s |  |  No case conflicting files found.  |
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   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-895926938


   Thanks @amahussein for your works.
   cc @sodonnel would you mind to give another checks? Consider branch-3.2.3 is prepared. I think it is good choice to involve this improvement there.


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[GitHub] [hadoop] brahmareddybattula commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
brahmareddybattula commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-918521589


   @Hexiaoqiao , There are two issues I want to bring with this merge. Can you please check once.?
   1) Looks commit's are squashed and merged, this should n't good way as there are 5 differenet commits with 5 jira's..In furute,if we want to revert one commit(among these 5), then all commits we need to revert.
   2) It's not merged to branch-3.2.3, But jira marked to hadoop-3.2.3 version..?


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-917394169


   Committed to branch-3.2. Thanks @amahussein for your works and thanks @brahmareddybattula for your reviews!


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[GitHub] [hadoop] amahussein commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-916113850


   Hi @Hexiaoqiao, Is this PR ready for merge?


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[GitHub] [hadoop] amahussein commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909234801


   > Thanks @amahussein for your works. I trigger Yetus and it seems works well. Failed unit test `TestDirectoryScanner ` looks not related to changes. AND verify this feature with pseudo cluster, it also seems work well.
   > Just notice that this PR include different cherry-pick commits together. I am not sure if it is traced gracefully when check in.
   > @brahmareddybattula do you have any idea here? If not I would like give my +1.
   
   Thanks @Hexiaoqiao for the review and the feedback. I appreciate it.
   
   I intentionally cherry-picked the commits related to the feature so that the PR would be complete. Otherwise, if we did separate PRs for each commit, branch-3.2 would be broken.
   I believe it should be okay to have multiple cherry-picks as long as the final merge would not squash them into one.
   


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909239985


   Thanks @amahussein. It is OK for me to squash and check in them together. Just find there are many checks failed reported by Yetus here. Do you mind give another check?
   Considering branch-3.2 will release recently, I think it is time to push this PR into branch-3.2 before release happen. 


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-918845356


   revert squashed commit and cherry-pick single commit for branch-3.2.


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909239985


   Thanks @amahussein. It is OK for me to squash and check in them together. Just find there are many checks failed reported by Yetus here. Do you mind give another check?
   Considering branch-3.2 will release recently, I think it is time to push this PR into branch-3.2 before release happen. 


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[GitHub] [hadoop] amahussein edited a comment on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein edited a comment on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909634740


   After rebasing, it looks like there are javac checks added to the build that failed it.
   Although this is a part of the original code, I decided to address it so that we can pass the build and move forward with the PR.
   I also tested the TestDirectoryScanner and It passed.


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[GitHub] [hadoop] amahussein commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909634740


   After rebasing, it looks like there are javac checks added to the build that failed it.
   Although this is a part of the original code, I decided to address it so that we can pass the build and move forward with the PR.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-894761816


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
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[GitHub] [hadoop] amahussein commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909234801






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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-906071805


   @jojochuang Would you mind to have another check?


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909105949


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909806663


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] brahmareddybattula commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
brahmareddybattula commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-913357847


   @amahussein thanks for working on this.. At first glance,it's better to have seperate PR for Each jira backport.It can be easy to review and maintain in future.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-905303834


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   | Subsystem | Report/Notes |
   |----------:|:-------------|
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[GitHub] [hadoop] amahussein commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909242831


   > Thanks @amahussein. It is OK for me to squash and check in them together. Just find there are many checks failed reported by Yetus here. Do you mind give another check?
   > Considering branch-3.2 will release recently, I think it is time to push this PR into branch-3.2 before release happen.
   
   I will rebase the code changes and push a fresh version.
   P.S: the final merge "_should not_" squash the commits. 


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[GitHub] [hadoop] amahussein commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
amahussein commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909234801






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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-918793612


   @brahmareddybattula Good point. Will revert and check in per-commit. Thanks. For version, I forgot we have create branch-3.2.3 already.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-905580662


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909239985


   Thanks @amahussein. It is OK for me to squash and check in them together. Just find there are many checks failed reported by Yetus here. Do you mind give another check?
   Considering branch-3.2 will release recently, I think it is time to push this PR into branch-3.2 before release happen. 


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[GitHub] [hadoop] Hexiaoqiao commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
Hexiaoqiao commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-916596838


   Will commit to branch-3.2 for a short while if no more comments.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #3200: HDFS-15160. branch-3.2. ReplicaMap, Disk Balancer, Directory Scanner and various FsDatasetImpl methods should use datanode readlock.

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3200:
URL: https://github.com/apache/hadoop/pull/3200#issuecomment-909105949






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