[
https://issues.apache.org/jira/browse/HIVE-21197?focusedWorklogId=204094&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-204094
]
ASF GitHub Bot logged work on HIVE-21197:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 26/Feb/19 05:36
Start Date: 26/Feb/19 05:36
Worklog Time Spent: 10m
Work Description: sankarh commented on pull request #541: HIVE-21197 :
Hive Replication can add duplicate data during migration to a target with
hive.strict.managed.tables enabled
URL: https://github.com/apache/hive/pull/541#discussion_r260131280
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/plan/ReplSetFirstIncLoadFlagDesc.java
##########
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.ql.plan;
+import org.apache.hadoop.hive.ql.plan.Explain.Level;
+
+import java.io.Serializable;
+
+/**
+ * ReplSetFirstIncLoadFlagDesc.
+ *
+ */
+@Explain(displayName = "Set First Incr Load Flag", explainLevels = {
Level.USER, Level.DEFAULT, Level.EXTENDED })
+public class ReplSetFirstIncLoadFlagDesc extends DDLDesc implements
Serializable {
+
+ private static final long serialVersionUID = 1L;
+ String databaseName;
+ String tableName;
+ boolean incLoadPendingFlag;
+
+ /**
+ * For serialization only.
+ */
+ public ReplSetFirstIncLoadFlagDesc() {
+ }
+
+ public ReplSetFirstIncLoadFlagDesc(String databaseName, String tableName,
boolean incLoadPendingFlag) {
+ super();
+ this.databaseName = databaseName;
+ this.tableName = tableName;
+ this.incLoadPendingFlag = incLoadPendingFlag;
+ }
+
+ @Explain(displayName="db_name", explainLevels = { Level.USER, Level.DEFAULT,
Level.EXTENDED })
+ public String getDatabaseName() {
+ return databaseName;
+ }
+
+ public void setDatabaseName(String databaseName) {
+ this.databaseName = databaseName;
+ }
+
+ @Explain(displayName="table_name", explainLevels = { Level.USER,
Level.DEFAULT, Level.EXTENDED })
+ public String getTableName() {
+ return tableName;
+ }
+
+ public void setTableName(String tableName) {
+ this.tableName = tableName;
+ }
+
+ @Explain(displayName="inc load pending flag", explainLevels = { Level.USER,
Level.DEFAULT, Level.EXTENDED })
Review comment:
OK
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Issue Time Tracking
-------------------
Worklog Id: (was: 204094)
Time Spent: 21.5h (was: 21h 20m)
> Hive replication can add duplicate data during migration to a target with
> hive.strict.managed.tables enabled
> ------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-21197
> URL: https://issues.apache.org/jira/browse/HIVE-21197
> Project: Hive
> Issue Type: Task
> Components: repl
> Reporter: mahesh kumar behera
> Assignee: mahesh kumar behera
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21197.01.patch, HIVE-21197.02.patch,
> HIVE-21197.03.patch, HIVE-21197.04.patch
>
> Time Spent: 21.5h
> Remaining Estimate: 0h
>
> During bootstrap phase it may happen that the files copied to target are
> created by events which are not part of the bootstrap. This is because of the
> fact that, bootstrap first gets the last event id and then the file list.
> During this period if some event are added, then bootstrap will include files
> created by these events also.The same files will be copied again during the
> first incremental replication just after the bootstrap. In normal scenario,
> the duplicate copy does not cause any issue as hive allows the use of target
> database only after the first incremental. But in case of migration, the file
> at source and target are copied to different location (based on the write id
> at target) and thus this may lead to duplicate data at target. This can be
> avoided by having at check at load time for duplicate file. This check can be
> done only for the first incremental and the search can be done in the
> bootstrap directory (with write id 1). if the file is already present then
> just ignore the copy.
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