A DESCRIPTION OF THE PROBLEM :
check the context-length (may be null in chunked encoding) before invoke Long.parseLong to avoid a large amount of gabage in a bunch of http call.

jdk/src/share/classes/sun/net/www/protocol/http/HttpURLConnection.java

please see the patch at
https://github.com/wuhongzhi/openjdk-jdk8u/commit/d5cf8b756798b37873de764626d3f93f1e54c760