[DRILL-6641] TestConvertCountToDirectScan.ensureCorrectCountWithMissingStatistics() test fails randomly

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.15.0
• Labels: ready-to-commit
• Assignee: Vova Vysotskyi
• Reporter: Vova Vysotskyi
• Reviewer: Arina Ielchiieva
• Created: 27/Jul/18 10:07
• Updated: 30/Jul/18 21:47
• Resolved: 30/Jul/18 21:47

Description

TestConvertCountToDirectScan.ensureCorrectCountWithMissingStatistics() fails randomly with assertion error:

Found unwanted pattern in plan: DynamicPojoRecordReader
00-00    Screen
00-01      Project(cnt_str=[$0], cnt_total=[$1])
00-02        Scan(groupscan=[files = [/home/vitalii/IdeaProjects/drill-fork/exec/java-exec/target/org.apache.drill.exec.planner.logical.TestConvertCountToDirectScan/dfsTestTmp/1532655133770-0/wide_str_table/0_0_2.parquet, /home/vitalii/IdeaProjects/drill-fork/exec/java-exec/target/org.apache.drill.exec.planner.logical.TestConvertCountToDirectScan/dfsTestTmp/1532655133770-0/wide_str_table/0_0_1.parquet], numFiles = 2, DynamicPojoRecordReader{records = [[0, 2]]}])

This test uses a table with two partitions and it may fail when a partition with set statistics is taken first in the ParquetGroupScanStatistics.collect() method, which is indirectly called from ConvertCountToDirectScan rule.

Issue Links

• links to: GitHub Pull Request #1406