ConcurrentModificationException occurs during the Seam validation ----------------------------------------------------------------- Key: JBIDE-2090 URL: https://issues.jboss.org/browse/JBIDE-2090 Project: Tools (JBoss Tools) Issue Type: Bug Components: seam2 Affects Versions: 2.1.0.beta1 Environment: I got the exception a few times on Linux, but I am not sure if this is a Linux specific issue Reporter: Snjezana Peco Assignee: Victor Rubezhny Priority: Critical Fix For: 2.1.0.CR1 Attachments: DeadLock.txt, s1.txt, s2.txt, StringIndexOutOfBoundsException.txt Sometimes when executing the Seam validation, I get ConcurrentModificationException. Steps to reproduce: - create a large Seam project (as described in http://jira.jboss.com/jira/browse/JBIDE-1105#action_12394448 , for instance) - open a few files in the VPE editor - select the WebContent directory and choose Source>Format - edit files during the Seam validation Stack trace: java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) at java.util.AbstractList$Itr.next(AbstractList.java:343) at org.jboss.tools.common.model.util.TypeInfoCollector.getProperties(TypeInfoCollector.java:843) at org.jboss.tools.common.model.util.TypeInfoCollector.getPropertyPresentations(TypeInfoCollector.java:883) at org.jboss.tools.seam.internal.core.el.SeamELCompletionEngine.resolveSeamELOperand(SeamELCompletionEngine.java:620) at org.jboss.tools.seam.internal.core.el.SeamELCompletionEngine.resolveSeamELOperand(SeamELCompletionEngine.java:330) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateElOperand(SeamELValidator.java:293) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateEl(SeamELValidator.java:271) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateString(SeamELValidator.java:260) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateNodeContent(SeamELValidator.java:240) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateChildNodes(SeamELValidator.java:221) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateChildNodes(SeamELValidator.java:225) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateChildNodes(SeamELValidator.java:225) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateDom(SeamELValidator.java:194) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validateFile(SeamELValidator.java:153) at org.jboss.tools.seam.internal.core.validation.SeamELValidator.validate(SeamELValidator.java:106) at org.jboss.tools.seam.internal.core.validation.SeamValidatorManager.validate(SeamValidatorManager.java:79) at org.jboss.tools.seam.internal.core.validation.SeamValidatorManager.validateInJob(SeamValidatorManager.java:64) at org.eclipse.wst.validation.internal.operations.ValidatorJob.run(ValidatorJob.java:75) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)