After upgrading to 8.0.0 I started to get the following error when trying to connect using java sdk 1.6.5:
Caused by: java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:851) ~[na:1.8.0_131]
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678) ~[na:1.8.0_131]
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:848) ~[na:1.8.0_131]
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678) ~[na:1.8.0_131]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1569) ~[na:1.8.0_131]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474) ~[na:1.8.0_131]
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480) ~[na:1.8.0_131]
at com.splunk.HttpService.send(HttpService.java:467) ~[splunk-sdk-java-1.6.5.jar:1.6.5]
Have you opened a support case for this? If there is an actual defect in 8.0 that is causing this issue, they can file it with the engineering team.