NPE used for flow control
-------------------------
Key: WHIRR-394
URL: https://issues.apache.org/jira/browse/WHIRR-394
Project: Whirr
Issue Type: Bug
Components: core
Reporter: David Alves
Priority: Minor
ScriptBasedClusterAction is using NPE for flow control.
public Cluster execute(ClusterSpec clusterSpec, Cluster cluster) throws
IOException, InterruptedException {
...
for (String role : instanceTemplate.getRoles()) {
try {
handlerMap.get(role).beforeAction(event);
} catch (NullPointerException e) {
throw new IllegalArgumentException("No handler for role " + role);
}
}
...
}
I just lost about an hour trying to find out why the actionhandler was not
being registered while the NPE came from the beforeAction() call.
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