RFR: 8256459: java/net/httpclient/ManyRequests.java and java/net/httpclient/LineBodyHandlerTest.java fail infrequently with java.net.ConnectException: Connection timed out: no further information [v2]

[Daniel Fuchs]

> Hi, 
> 
> Please find here a changeset that fixes the infrequent (but annoying) test failures
> caused by unexpected ConnectionException "Connection timed out: no further information"
> which have been observed to occur on some platforms.
> 
> Tests are updated to allow the test server to handle requests concurrently.
> PlainHttpConnection is updated to retry connection once if chan::finishConnect fails
> early with ConnectionException and the connection timeout has not expired.

Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:

  8256459: java/net/httpclient/ManyRequests.java and java/net/httpclient/LineBodyHandlerTest.java fail infrequently with java.net.ConnectException: Connection timed out: no further information
  
  Connect will not be retried if retry connect is disabled
  JBS issue label noreg-self removed and bug id added to tests

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1716/files
  - new: https://git.openjdk.java.net/jdk/pull/1716/files/617c1f5a..090b390f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1716&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1716&range=00-01

  Stats: 12 lines in 5 files changed: 3 ins; 0 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1716.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1716/head:pull/1716

PR: https://git.openjdk.java.net/jdk/pull/1716