“Illegal State Exception: Already Connected” when using HttpURLConnection

Question

I get an illegal state exception when i set DoOutput to true.

public boolean sendLinksToMaster(String ipport, List links){

        boolean sen         


        

Answer 1

Apart from the watches as mentioned in the previous comment, it might also occur if there is something wrong with the connection. For example:

I was setting a property:post.setRequestProperty("Ocp-Apim-Subscription-Key", "<>") after writing into OutPut Stream like post.getOutputStream().write(jsonBody.getBytes("UTF-8"));

It was like:

post.getOutputStream().write(jsonBody.getBytes("UTF-8"))
post.setRequestProperty("Ocp-Apim-Subscription-Key", "<>")

In this case, I was also getting "Already Connected". To fix it I made it like:

post.setRequestProperty("Ocp-Apim-Subscription-Key", "<>")
post.getOutputStream().write(jsonBody.getBytes("UTF-8"))