[SAMOA-71] HorizontalAMRulesRegressor fails with ConcurrentModificationException

• Type: Bug
• Status: To Do
• Priority: Minor
• Resolution: Unresolved
• Component/s: SAMOA-API
• Assignee: Unassigned
• Reporter: Maciej Grzenda
• Created: 17/Jul/17 14:36
• Updated: 06/Oct/17 01:12

Description

When Horizontal Adaptive Model Rules Regressor is used, AMRRuleSetProcessor that is used in turn occasionally fails with ConcurrentModificationException:

Exception in thread "main" java.util.ConcurrentModificationException
at java.util.LinkedList$ListItr.checkForComodification(Unknown Source)
at java.util.LinkedList$ListItr.next(Unknown Source)
at org.apache.samoa.learners.classifiers.rules.distributed.AMRRuleSetPro
cessor.processInstanceEvent(AMRRuleSetProcessor.java:130)

The reason seems to be ruleSet is not thread-safe, but this can be possibly changed.

Issue Links

• links to: GitHub Pull Request #68