[CALCITE-3336] Intermittent failure of PigRelBuilderStyleTest.testImplWithGroupByCountDistinct

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.21.0
• Component/s: pig-adapter

Environment

Jenkins environment
jdk-11-ea+28
apache-maven-3.5.2
Ubuntu 16.04 LTS

Local Environment (jfeinauer)
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
Apache Maven 3.6.1 (d66c9c0b3152b2e69ee9bac180bb8fcc8e6af555; 2019-04-04T12:00:29-07:00)
macOS Mojave 10.14.4 (18E226)

• Assignee: Unassigned
• Reporter: Stamatis Zampetakis
• Created: 09/Sep/19 22:01
• Updated: 09/Sep/19 22:16

Description

The following tests fails intermittently with the following stack trace:

[ERROR] Tests run: 8, Failures: 0, Errors: 1, Skipped: 4, Time elapsed: 5.518 s <<< FAILURE! - in org.apache.calcite.test.PigRelBuilderStyleTest
[ERROR] testImplWithGroupByCountDistinct(org.apache.calcite.test.PigRelBuilderStyleTest)  Time elapsed: 3.82 s  <<< ERROR!
org.apache.pig.impl.logicalLayer.FrontendException: Unable to open iterator for alias t
	at org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
	at org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
Caused by: org.apache.pig.PigException: Unable to store alias t
	at org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
	at org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
Caused by: org.apache.pig.impl.logicalLayer.FrontendException: Error processing rule LoadTypeCastInserter
	at org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
	at org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)
Caused by: java.lang.NullPointerException
	at org.apache.calcite.test.PigRelBuilderStyleTest.assertScriptAndResults(PigRelBuilderStyleTest.java:270)
	at org.apache.calcite.test.PigRelBuilderStyleTest.testImplWithGroupByCountDistinct(PigRelBuilderStyleTest.java:167)

The problem appeared a few times in Jenkins (e.g., in build 1330) and was observed also by julian.feinauer.