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LGTM , just few questions


ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Initiator.java
Line 153 (original)
<https://reviews.apache.org/r/72469/#comment309076>

    Cleanup functionality was moved out of the Initiator and is covered by 
HousekeeperThreadnow. Is it right?



ql/src/test/org/apache/hadoop/hive/ql/txn/compactor/TestInitiator.java
Line 205 (original)
<https://reviews.apache.org/r/72469/#comment309078>

    Do we have similar test for Housekeeper?



standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/AcidCompactionHistoryService.java
Line 31 (original), 32 (patched)
<https://reviews.apache.org/r/72469/#comment309081>

    What does empty txn mean? Is it obsolete/abandoned/timed-out txns?



standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/AcidHouseKeeperService.java
Lines 84 (patched)
<https://reviews.apache.org/r/72469/#comment309082>

    Old AcidCompactionHistoryService was doing same stuff 
(txnHandler.purgeCompactionHistory()). Do we need than 
AcidEmptyTxnCleanerService and if yes can we embed it here?


- Denys Kuzmenko


On May 4, 2020, 12:58 p.m., Marton Bod wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/72469/
> -----------------------------------------------------------
> 
> (Updated May 4, 2020, 12:58 p.m.)
> 
> 
> Review request for hive, Denys Kuzmenko and Peter Vary.
> 
> 
> Repository: hive-git
> 
> 
> Description
> -------
> 
> Consolidate different metastore housekeeper threads into one, move cleaner 
> methods out of compactor initiator. 
> Create separate txn cleaner service which will need to run more frequently.
> 
> 
> Diffs
> -----
> 
>   common/src/java/org/apache/hadoop/hive/conf/HiveConf.java 829791e0a9 
>   ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Initiator.java 
> 23512e252e 
>   ql/src/test/org/apache/hadoop/hive/ql/TestTxnCommands2.java 48bf8529fa 
>   ql/src/test/org/apache/hadoop/hive/ql/TestTxnCommands3.java 5b8c6701e1 
>   ql/src/test/org/apache/hadoop/hive/ql/TestTxnCommandsForMmTable.java 
> eac2c6307f 
>   ql/src/test/org/apache/hadoop/hive/ql/lockmgr/TestDbTxnManager2.java 
> 1687425bcb 
>   ql/src/test/org/apache/hadoop/hive/ql/txn/compactor/TestInitiator.java 
> e4ff14a140 
>   
> standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/conf/MetastoreConf.java
>  842b7fe53d 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java
>  7bba8d6ee6 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MaterializationsRebuildLockCleanerTask.java
>  d35c9602a6 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/AcidCompactionHistoryService.java
>  e96a7ba289 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/AcidHouseKeeperService.java
>  c4a488bac0 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/AcidOpenTxnsCounterService.java
>  2ad5a89f03 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/AcidWriteSetService.java
>  5ec513dfd4 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
>  8fded608d0 
>   
> standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnStore.java
>  e8ac71ae55 
>   
> standalone-metastore/metastore-server/src/test/java/org/apache/hadoop/hive/metastore/conf/TestMetastoreConf.java
>  9905a14983 
>   
> standalone-metastore/metastore-server/src/test/java/org/apache/hadoop/hive/metastore/txn/TestAcidEmptyTxnCleanerService.java
>  PRE-CREATION 
> 
> 
> Diff: https://reviews.apache.org/r/72469/diff/2/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Marton Bod
> 
>

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