[JIRA] (JENKINS-62231) ec2 downgrade from 1.50 fails removing the configured cloud

Ramon Leon edited a comment on JENKINS-62231

Re: ec2 downgrade from 1.50 fails removing the configured cloud

The error seems to be a kind of race-condition between the initialization of the ec2-plugin and the OldDataMonitor extension point.

RobustReflectionConverter has to report a non-existing field, but it fails with an exception when it tries to do:
            
{code:java}
OldDataMonitor.report((Saveable)result, (ArrayList<Throwable>)context.get("ReadError"));
{code}

This call ends up on this other one:

{code:java}
return ExtensionList.lookupSingleton(OldDataMonitor.class);
{code}

which triggers:

{code:java}
java.lang.IllegalStateException: Expected 1 instance of hudson.diagnosis.OldDataMonitor but got 0
{code}

I will try to add an Adding _@Extension( ordinal =-1)_ to the @Extension of the EC2 plugin to try to load this one after the AdministrativeMonitors doesn't solve the problem .

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