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https://issues.apache.org/jira/browse/HIVE-21213?focusedWorklogId=361576&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-361576
]
ASF GitHub Bot logged work on HIVE-21213:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Dec/19 10:34
Start Date: 20/Dec/19 10:34
Worklog Time Spent: 10m
Work Description: ashutosh-bapat commented on pull request #587:
HIVE-21213 : Acid table bootstrap replication needs to handle directory created
by compaction with txn id
URL: https://github.com/apache/hive/pull/587#discussion_r360315681
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/parse/repl/CopyUtils.java
##########
@@ -463,7 +464,29 @@ public static Path
getCopyDestination(ReplChangeManager.FileInfo fileInfo, Path
String[] subDirs = fileInfo.getSubDir().split(Path.SEPARATOR);
Path destination = destRoot;
for (String subDir: subDirs) {
- destination = new Path(destination, subDir);
+ // If the directory is created by compactor, then the directory will
have the transaction id also.
+ // In case of replication, the same txn id can not be used at target, as
the txn with same id might be a
+ // aborted or live txn at target.
+ // In case of bootstrap load, we copy only the committed data, so the
directory with only write id
+ // can be created. The validity txn id can be removed from the directory
name.
+ // TODO : Support for incremental load flow. This can be done once
replication of compaction is decided.
+ if (AcidUtils.getVisibilityTxnId(subDir) > 0) {
+ if (subDir.startsWith(AcidUtils.BASE_PREFIX)) {
+ AcidUtils.ParsedBase pb = AcidUtils.ParsedBase.parseBase(new
Path(subDir));
+ destination = new Path(destination,
AcidUtils.baseDir(pb.getWriteId()));
+ } else if (subDir.startsWith(AcidUtils.DELTA_PREFIX)) {
+ AcidUtils.ParsedDeltaLight pdl =
AcidUtils.ParsedDeltaLight.parse(new Path(subDir));
+ destination = new Path(destination,
AcidUtils.deltaSubdir(pdl.getMinWriteId(), pdl.getMaxWriteId()));
+ } else if (subDir.startsWith(AcidUtils.DELETE_DELTA_PREFIX)) {
+ AcidUtils.ParsedDeltaLight pdl =
AcidUtils.ParsedDeltaLight.parse(new Path(subDir));
+ destination = new Path(destination,
AcidUtils.deleteDeltaSubdir(pdl.getMinWriteId(), pdl.getMaxWriteId()));
Review comment:
Hmm, when the statement ids are actually used, this might become a problem.
For now this looks ok.
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Issue Time Tracking
-------------------
Worklog Id: (was: 361576)
Time Spent: 1.5h (was: 1h 20m)
> Acid table bootstrap replication needs to handle directory created by
> compaction with txn id
> --------------------------------------------------------------------------------------------
>
> Key: HIVE-21213
> URL: https://issues.apache.org/jira/browse/HIVE-21213
> Project: Hive
> Issue Type: Bug
> Components: Hive, HiveServer2, repl
> Reporter: mahesh kumar behera
> Assignee: mahesh kumar behera
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21213.01.patch, HIVE-21213.02.patch,
> HIVE-21213.03.patch
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> The current implementation of compaction uses the txn id in the directory
> name. This is used to isolate the queries from reading the directory until
> compaction has finished and to avoid the compactor marking used earlier. In
> case of replication, during bootstrap , directory is copied as it is with the
> same name from source to destination cluster. But the directory created by
> compaction with txn id can not be copied as the txn list at target may be
> different from source. The txn id which is valid at source may be an aborted
> txn at target. So conversion logic is required to create a new directory with
> valid txn at target and dump the data to the newly created directory.
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