[jboss-jira] [JBoss JIRA] (WFCORE-2171) StackOverflowError after repeated management write ops

[Brian Stansberry (JIRA)]

Brian Stansberry created WFCORE-2171:
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             Summary: StackOverflowError after repeated management write ops
                 Key: WFCORE-2171
                 URL: https://issues.jboss.org/browse/WFCORE-2171
             Project: WildFly Core
          Issue Type: Bug
          Components: Domain Management
            Reporter: Brian Stansberry
            Assignee: Brian Stansberry


I wrote an integration test that allows you to set a system prop and repeatedly call full-replace-deployment (see https://github.com/wildfly/wildfly-core/pull/2062). When I try and run it 30K times I get:

2017-01-09 22:28:40,431 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 3) WFLYCTL0013: Operation ("full-replace-deployment") failed - address: ([]): java.lang.StackOverflowError
	at java.util.Collections$UnmodifiableCollection.size(Collections.java:1030)
	at java.util.Collections$UnmodifiableCollection.size(Collections.java:1030)
	at java.util.Collections$UnmodifiableCollection.size(Collections.java:1030)

I think this is due to BasicResource.clone()'s handling of orderedChildResources. It takes the internal set, wraps it in Collections.unmodifiableSet and passes it in to the clone, which in turn will do the same thing if cloned. So for each management write op, the same underlying set gets wrapped in another layer. Hence the overflow of size calls.



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