sun/net/www/http/HttpClient/MultiThreadTest.java still failing intermittently

INFO: 11 have been used, with 6 becoming idle for more than 1s while using 5 threads to make concurrent connections
waiting for worker to shutdown at 1760ms
worker: 1 end at 1699ms, elapsed since worker start: 1687ms, elapsed since accept: 1687ms, timeout exceeded: 1, successfuly handled 12/12 genuine requests, , mayHaveTimedOut: true
worker: 4 end at 1699ms, elapsed since worker start: 1685ms, elapsed since accept: 1686ms, timeout exceeded: 1, successfuly handled 10/10 genuine requests, , mayHaveTimedOut: true
worker: 2 end at 1700ms, elapsed since worker start: 1688ms, elapsed since accept: 1688ms, timeout exceeded: 1, successfuly handled 11/11 genuine requests, , mayHaveTimedOut: true
worker: 3 end at 1700ms, elapsed since worker start: 1687ms, elapsed since accept: 1687ms, timeout exceeded: 1, successfuly handled 12/12 genuine requests, , mayHaveTimedOut: true
worker: 5 end at 1699ms, elapsed since worker start: 1654ms, elapsed since accept: 1655ms, timeout exceeded: 1, successfuly handled 8/8 genuine requests, , mayHaveTimedOut: true
worker: 7: Shutdown at 5190ms
worker: 6: Shutdown at 5190ms
worker: 8: Shutdown at 5190ms
worker: 6 end at 5190ms, elapsed since worker start: 3521ms, elapsed since accept: 3522ms, timeout exceeded: 0, successfuly handled 11/11 genuine requests, , mayHaveTimedOut: true
worker: 7 end at 5190ms, elapsed since worker start: 3521ms, elapsed since accept: 3521ms, timeout exceeded: 0, successfuly handled 9/9 genuine requests, , mayHaveTimedOut: true
worker: 10: Shutdown at 5190ms
worker: 9: Shutdown at 5190ms
worker: 8 end at 5190ms, elapsed since worker start: 3521ms, elapsed since accept: 3521ms, timeout exceeded: 0, successfuly handled 8/8 genuine requests, , mayHaveTimedOut: true
worker: 9 end at 5191ms, elapsed since worker start: 3521ms, elapsed since accept: 3521ms, timeout exceeded: 0, successfuly handled 9/9 genuine requests, , mayHaveTimedOut: true
worker: 10 end at 5191ms, elapsed since worker start: 3519ms, elapsed since accept: 3521ms, timeout exceeded: 0, successfuly handled 8/8 genuine requests, , mayHaveTimedOut: true
main thread end - 61858ms
----------System.err:(15/719)----------

JavaTest Message: Test complete.


JavaTest Message: Problem cleaning up the following threads:
Worker-0
  at java.base@11.0.20-ea/java.net.SocketInputStream.socketRead0(Native Method)
  at java.base@11.0.20-ea/java.net.SocketInputStream.socketRead(SocketInputStream.java:115)
  at java.base@11.0.20-ea/java.net.SocketInputStream.read(SocketInputStream.java:168)
  at java.base@11.0.20-ea/java.net.SocketInputStream.read(SocketInputStream.java:140)
  at java.base@11.0.20-ea/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
  at java.base@11.0.20-ea/java.io.BufferedInputStream.read(BufferedInputStream.java:271)
  at Worker.readUntil(MultiThreadTest.java:427)
  at Worker.run(MultiThreadTest.java:469)

result: Error. Error while cleaning up threads after test