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https://issues.apache.org/jira/browse/HIVE-23671?focusedWorklogId=454916&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-454916
]
ASF GitHub Bot logged work on HIVE-23671:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 06/Jul/20 15:54
Start Date: 06/Jul/20 15:54
Worklog Time Spent: 10m
Work Description: pvargacl commented on a change in pull request #1087:
URL: https://github.com/apache/hive/pull/1087#discussion_r450318861
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/io/AcidUtils.java
##########
@@ -2392,33 +2392,29 @@ public static TableSnapshot
getTableSnapshot(Configuration conf,
long writeId = -1;
ValidWriteIdList validWriteIdList = null;
- HiveTxnManager sessionTxnMgr = SessionState.get().getTxnMgr();
- String fullTableName = getFullTableName(dbName, tblName);
- if (sessionTxnMgr != null && sessionTxnMgr.getCurrentTxnId() > 0) {
- validWriteIdList = getTableValidWriteIdList(conf, fullTableName);
- if (isStatsUpdater) {
- writeId = SessionState.get().getTxnMgr() != null ?
- SessionState.get().getTxnMgr().getAllocatedTableWriteId(
- dbName, tblName) : -1;
- if (writeId < 1) {
- // TODO: this is not ideal... stats updater that doesn't have write
ID is currently
- // "create table"; writeId would be 0/-1 here. No need to call
this w/true.
- LOG.debug("Stats updater for {}.{} doesn't have a write ID ({})",
- dbName, tblName, writeId);
+ if (SessionState.get() != null) {
+ HiveTxnManager sessionTxnMgr = SessionState.get().getTxnMgr();
+ String fullTableName = getFullTableName(dbName, tblName);
+ if (sessionTxnMgr != null && sessionTxnMgr.getCurrentTxnId() > 0) {
+ validWriteIdList = getTableValidWriteIdList(conf, fullTableName);
+ if (isStatsUpdater) {
+ writeId = sessionTxnMgr != null ?
sessionTxnMgr.getAllocatedTableWriteId(dbName, tblName) : -1;
Review comment:
fixed
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Issue Time Tracking
-------------------
Worklog Id: (was: 454916)
Time Spent: 7h 40m (was: 7.5h)
> MSCK repair should handle transactional tables in certain usecases
> ------------------------------------------------------------------
>
> Key: HIVE-23671
> URL: https://issues.apache.org/jira/browse/HIVE-23671
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Peter Varga
> Assignee: Peter Varga
> Priority: Major
> Labels: pull-request-available
> Time Spent: 7h 40m
> Remaining Estimate: 0h
>
> The MSCK REPAIR tool does not handle transactional tables too well. It can
> find and add new partitions the same way as for non-transactional tables, but
> since the writeId differences are not handled, the data can not read back
> from the new partitions.
> We could handle some usecases when the writeIds in the HMS and the underlying
> data are not conflicting. If the HMS does not contains allocated writes for
> the table we can seed the table with the writeIds read from the directory
> structrure.
> Real life use cases could be:
> * Copy data files from one cluster to another with different HMS, create the
> table and call MSCK REPAIR
> * If the HMS db is lost, recreate the table and call MSCK REPAIR
>
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