[seam-issues] [JBoss JIRA] (JBSEAM-4997) Deadlock with components using factories of each other

Deadlock with components using factories of each other ------------------------------------------------------ Key: JBSEAM-4997 URL: https://issues.jboss.org/browse/JBSEAM-4997 Project: Seam 2 Issue Type: Bug Components: Core Affects Versions: 2.3.0.BETA2 Environment: Seam 2.3.0.CR1-SNAPSHOT r14979, AS 7.1.2.Final Reporter: Marek Schmidt Assignee: Marek Novotny Fix For: 2.3.0.CR1 The patch in JBSEAM-4861 introduced a potential deadlock with components using each other factories, such as in the following sample: {code} @Scope(ScopeType.APPLICATION) @Name("factoryLock.knitFactory") public static class KnitFactory { @Factory(value="factoryLock.knitPurl", scope=ScopeType.SESSION) public String getDoubleKnit() { return "knit(" + (String)Component.getInstance("factoryLock.purl") + ")"; } @Factory(value="factoryLock.knit", scope=ScopeType.SESSION) public String getKnit() { return "knit"; } } @Scope(ScopeType.APPLICATION) @Name("factoryLock.purlFactory") public static class PurlFactory { @Factory(value="factoryLock.purlKnit", scope=ScopeType.SESSION) public String getDoublePurl() { return "purl(" + (String)Component.getInstance("factoryLock.knit") + ")"; } @Factory(value="factoryLock.purl", scope=ScopeType.SESSION) public String getPurl() { return "purl"; } } {code} this may cause a deadlock if two different requests in the same session ask for #{factoryLock.knitPurl} and #{factoryLock.purlKnit} respectively. The problem is that different threads may lock the components in different order.