With the current implementation of HttpURLConnection if server rejects the “Expect 100-continue” then there will be ‘java.net.ProtocolException’ will be thrown from 'expect100Continue()' method.
After the exception thrown, If we call any other method on the same instance (ex getHeaderField(), or getHeaderFields()). They will internally call getOuputStream() which invokes writeRequests(), which make the actual server call. The code change will sets the existing variable ‘rememberedException’ when there is exception and getOutputStream0() will re-throw ‘rememberedException’ if the ‘rememberedException’ is not null. Note: getOutputStream0() also call’s ‘expect100Continue()’ if ‘expectContinue’ is true. ------------- Commit messages: - 8314978: Multiple server call from connection failing with expect100 in getOutputStream Changes: https://git.openjdk.org/jdk/pull/15483/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15483&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8314978 Stats: 257 lines in 2 files changed: 257 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/15483.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15483/head:pull/15483 PR: https://git.openjdk.org/jdk/pull/15483
