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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/01/22 14:00:36 UTC
[GitHub] [hadoop] tomscut opened a new pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
tomscut opened a new pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915
JIRA: [HDFS-16434](https://issues.apache.org/jira/browse/HDFS-16434).
In this issue at [HDFS-10872](https://issues.apache.org/jira/browse/HDFS-10872), we add opname to read and write locks. However, there are still many operations that have not been completed. When analyzing some operations that hold locks for a long time, we can only find specific methods through stack. I suggest that these remaining operations be completed to facilitate later performance optimization.
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[GitHub] [hadoop] tomscut commented on a change in pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tomscut commented on a change in pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#discussion_r832946641
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Namesystem.java
##########
@@ -63,4 +63,16 @@
* directories. Create them if not.
*/
void checkAndProvisionSnapshotTrashRoots();
+
+ /**
+ * Release read lock with operation name.
+ * @param opName
+ */
+ void readUnlock(String opName);
+
+ /**
+ * Release write lock with operation name.
+ * @param opName
+ */
+ void writeUnlock(String opName);
Review comment:
Thanks @tasanuma for your review and comment. I agree with you.
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[GitHub] [hadoop] tomscut commented on a change in pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tomscut commented on a change in pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#discussion_r834869705
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminDefaultMonitor.java
##########
@@ -158,7 +158,7 @@ public void run() {
LOG.warn("DatanodeAdminMonitor caught exception when processing node.",
e);
} finally {
- namesystem.writeUnlock();
+ namesystem.writeUnlock("datanodeAdminMonitorThread");
Review comment:
Thanks @tasanuma for your review. I fixed it.
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1032572323
:broken_heart: **-1 overall**
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1078703073
:broken_heart: **-1 overall**
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[GitHub] [hadoop] tomscut commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tomscut commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1038532614
Hi @tasanuma @ayushtkn @Hexiaoqiao , could you please take a look at this. Thanks.
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1076462287
:broken_heart: **-1 overall**
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[GitHub] [hadoop] tasanuma commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tasanuma commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1077804296
#4064 added a new `namesystem.writeUnlock()`. Could you add the opname too? The others look good to me.
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[GitHub] [hadoop] tasanuma merged pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tasanuma merged pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915
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[GitHub] [hadoop] tomscut commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tomscut commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1078553976
> #4064 added a new `namesystem.writeUnlock()`. Could you add the opname too? The others look good to me.
Thank you very much.
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[GitHub] [hadoop] tomscut commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tomscut commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1078928108
Thanks @tasanuma for your review and merging this.
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[GitHub] [hadoop] tasanuma commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tasanuma commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1078922059
Thanks for your contribution, @tomscut!
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1019343751
:broken_heart: **-1 overall**
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[GitHub] [hadoop] tasanuma commented on a change in pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tasanuma commented on a change in pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#discussion_r832926344
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Namesystem.java
##########
@@ -63,4 +63,16 @@
* directories. Create them if not.
*/
void checkAndProvisionSnapshotTrashRoots();
+
+ /**
+ * Release read lock with operation name.
+ * @param opName
+ */
+ void readUnlock(String opName);
+
+ /**
+ * Release write lock with operation name.
+ * @param opName
+ */
+ void writeUnlock(String opName);
Review comment:
How about moving the new methods to RwLock since it has all lock-related methods? Although RwLock is not `@InterfaceAudience.Private`, I think we can add new methods there if the target version is 3.4.0.
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[GitHub] [hadoop] tasanuma commented on a change in pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tasanuma commented on a change in pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#discussion_r834081133
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminDefaultMonitor.java
##########
@@ -158,7 +158,7 @@ public void run() {
LOG.warn("DatanodeAdminMonitor caught exception when processing node.",
e);
} finally {
- namesystem.writeUnlock();
+ namesystem.writeUnlock("datanodeAdminMonitorThread");
Review comment:
```suggestion
namesystem.writeUnlock("DatanodeAdminMonitorThread");
```
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[GitHub] [hadoop] hadoop-yetus commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1026163379
:broken_heart: **-1 overall**
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[GitHub] [hadoop] tomscut commented on pull request #3915: HDFS-16434. Add opname to read/write lock for remaining operations
Posted by GitBox <gi...@apache.org>.
tomscut commented on pull request #3915:
URL: https://github.com/apache/hadoop/pull/3915#issuecomment-1038532614
Hi @tasanuma @ayushtkn @Hexiaoqiao , could you please take a look at this. Thanks.
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