[CASSANDRA-16576] jflex NPE (StateSetEnumerator.reset(…)) on arm64 and jdk11

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.0-rc1, 4.0
• Component/s: Build
• Bug Category: Packaging - All
• Severity: Normal
• Complexity: Normal
• Discovered By: Unit Test
• Platform: ARM
• Since Version: 3.4

Source Control Link

https://github.com/apache/cassandra/commit/e848d47ed171f20ccd8cf5e20d9e188ede85c17c

Test and Documentation Plan

CI

• Assignee: Unassigned
• Reporter: Michael Semb Wever

Reviewers

Brandon Williams

• Created: 08/Apr/21 09:40
• Updated: 11/Apr/21 19:25
• Resolved: 11/Apr/21 19:25

Description

NPE thrown from `ant generate-jflex-java` on jdk11 and arm64.

Upstream: https://github.com/jflex-de/jflex/issues/910

 java.lang.NullPointerException
 	at jflex.StateSetEnumerator.reset(StateSetEnumerator.java:40)
 	at jflex.NFA.containsFinal(NFA.java:295)
 	at jflex.NFA.getDFA(NFA.java:539)
 	at jflex.Main.generate(Main.java:80)
 	at jflex.anttask.JFlexTask.execute(JFlexTask.java:65)
 	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
 	at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
 	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
 	at org.apache.tools.ant.Task.perform(Task.java:350)
 	at org.apache.tools.ant.Target.execute(Target.java:449)
 	at org.apache.tools.ant.Target.performTasks(Target.java:470)
 	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
 	at org.apache.tools.ant.Project.executeTarget(Project.java:1361)
 	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
 	at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
 	at org.apache.tools.ant.Main.runBuild(Main.java:834)
 	at org.apache.tools.ant.Main.startAnt(Main.java:223)
 	at org.apache.tools.ant.launch.Launcher.run(Launcher.java:284)
 	at org.apache.tools.ant.launch.Launcher.main(Launcher.java:101)

Failures

• https://ci-cassandra.apache.org/view/Cassandra%204.0/job/Cassandra-trunk-artifacts/jdk=jdk_11_latest,label=cassandra-arm64/505/consoleFull
• https://ci-cassandra.apache.org/view/Cassandra%204.0/job/Cassandra-trunk-artifacts/501/jdk=jdk_11_latest,label=cassandra-arm64/console
• https://ci-cassandra.apache.org/view/Cassandra%204.0/job/Cassandra-trunk-artifacts/497/jdk=jdk_11_latest,label=cassandra-arm64/console