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Review request for atlas, Jayendra Parab, Nikhil Bonte, and Sarath Subramanian. Bugs: ATLAS-4285 https://issues.apache.org/jira/browse/ATLAS-4285 Repository: atlas Description ------- **Steps to Duplicate** _Setup_: - Create a linear lineage using chained CTAS queries via Hive or REST APIs E.g. ``` create view abcd_vw_1 as select * from abc; create view abcd_vw_2 as select * from abcd_vw_1; create view abcd_vw_3 as select * from abcd_vw_2; . . . ``` This should result in a long lineage. - Create 3 classifications, say C1, C2, C3. - Assign C1 to abcd_vw_1, C2 to abcd_vw_2 and C3 to abcd_vw_3. Expected result: abcd_vw_n should have all the 3 classifications propagated. **Aproach** Modify _propagateClassification_ to lock all the impacted vertices. Requests attempting to modify the same entity will thus be blocked. Diffs ----- repository/src/main/java/org/apache/atlas/repository/store/graph/v2/EntityGraphMapper.java 7984a34a4 repository/src/main/java/org/apache/atlas/repository/store/graph/v2/tasks/ClassificationPropagateTaskFactory.java 8a81dc952 repository/src/main/java/org/apache/atlas/repository/store/graph/v2/tasks/ClassificationPropagationTasks.java f86cbc722 repository/src/main/java/org/apache/atlas/tasks/TaskFactoryRegistry.java 38f2cc9cd repository/src/main/java/org/apache/atlas/tasks/TaskManagement.java 2756504da repository/src/test/java/org/apache/atlas/repository/tagpropagation/ClassificationPropagationWithTasksTest.java 84aefc9ef Diff: https://reviews.apache.org/r/73356/diff/1/ Testing ------- **Manual tests** Used the scenario described above. See the attached file used to generate lineage. Thanks, Ashutosh Mestry