source plugins failing on invalid data

[kierse]

Source plugins are crashing MR when the data isn't as expected or invalid. Rewrite code that consumes XML to remove long method chains and wrap entire process in a try/catch

dom.method1()[0].method2()[0].value

should become:

try
{
a = dom.method()[0]
a.method2()[0].value
}
catch {
...
}