Is there any valid reason to ever ignore a caught exception

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While there are some reasonable reasons for ignoring exceptions; however, generally it is only specific exceptions that you are able to safely ignore. As noted by Konrad Rudolph, you might have to catch and swallow an error as part of a framework; and as noted by osp70, there might be an exception generated by a framework that you know you can ignore.

In both of these cases though, you will likely know the exception type and if you know the type then you should have code similar to the following:

try {
  // Do something that might generate an exception
} catch (System.InvalidCastException ex) {
  // This exception is safe to ignore due to...
} catch (System.Exception ex) {
  // Exception handling
}

In the case of your application, is sounds like something similar might apply in some cases; but the example you give of a database save returning an “OK” even when there is an exception is not a very good sign.

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