NPE in AstValue.setValue() -------------------------- Key: WFLY-4405 URL: https://issues.jboss.org/browse/WFLY-4405 Project: WildFly Issue Type: Bug Components: JSF Affects Versions: 8.2.0.Final Environment: MacOS X, RHEL6 Reporter: Christer Bernérus Assignee: Farah Juma When submitting a page made up using a custom tag, or a composite component, WildFly reports NPE in AstValue.setValue(). The code where this happens is in javax.el-3.0.1-b05.jar and looks like this: {code:title=AstValue.java|borderStyle=solid} /* Note by kchung 10/2013 * The spec does not say if the value should be cocerced to the target * type before setting the value to the target. The conversion is kept * here to be backward compatible. */ ctx.setPropertyResolved(false); Class<?> targetType = elResolver.getType(ctx, t.base, property); if (ctx.isPropertyResolved()) { ctx.setPropertyResolved(false); Object targetValue = elResolver.convertToType(ctx, value, targetType); if (ctx.isPropertyResolved()) { value = targetValue; } else { if (value != null || targetType.isPrimitive()) { value = ELSupport.coerceToType(value, targetType); } } } {code} From my debugging session, I have seen that the code in {{elResolver.getType()}} may return null, which happens to me, but the subsequent code in {{AstValue.setValue()}} happily uses that null valued variable {{targetType}} for calling the method {{isPrimitive()}} which of course causes an NPE. Strangely enough, this behaviour seems intermittent in that restarting WildFly might make the bug go away or come back, but redeployment does not.