Response code from URL

I was using a URLConnection to go to a URL which essentially submitted a request onto a server for analysis of my query , and then I get a reference number from that URL to go to another one for the results.

For whatever reason at random times I get this error

java.io.IOException: Server returned HTTP response code: 502 for URL: http://www.....

I just wanted advice on whether bypassing the entire run of the program by using HttpURLConnection and getting the response code was the only and ideal solution to prevent this.

Wat I found on the wiki is that response code 502 indicates a bad gateway.

Quote:

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http://en.wikipedia.org/wiki/502_error#5xx_Server_Error


502 Bad Gateway
The server was acting as a gateway or proxy and received an invalid response from the upstream server.

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