java/net/httpclient/RequestBodyTest.java times out

This test was seen failing in jdk9/dev on windows i586 6.3

elapsed time (seconds): 480.609
STDOUT:
HTTP server port = 51221
HTTPS server port = 51224
Proxy port = 51227
Running test_request_body_type string and response type string and sync=false
OK
Running test_request_body_type string and response type byteArray and sync=false
OK
Running test_request_body_type string and response type byteArrays and sync=false
OK
Running test_request_body_type string and response type InputStream and sync=false
OK
Running test_request_body_type string and response type file and sync=false
OK
Running test_request_body_type byteArray and response type string and sync=false
OK
Running test_request_body_type byteArray and response type byteArray and sync=false
OK
Running test_request_body_type byteArray and response type byteArrays and sync=false
OK
Running test_request_body_type byteArray and response type InputStream and sync=false
OK
Running test_request_body_type byteArray and response type file and sync=false
OK
Running test_request_body_type byteArrays and response type string and sync=false
OK
Running test_request_body_type byteArrays and response type byteArray and sync=false
OK
Running test_request_body_type byteArrays and response type byteArrays and sync=false
OK
Running test_request_body_type byteArrays and response type InputStream and sync=false
OK
Running test_request_body_type byteArrays and response type file and sync=false
OK
Running test_request_body_type InputStream and response type string and sync=false
OK
Running test_request_body_type InputStream and response type byteArray and sync=false
OK
Running test_request_body_type InputStream and response type byteArrays and sync=false
OK
Running test_request_body_type InputStream and response type InputStream and sync=false
OK
Running test_request_body_type InputStream and response type file and sync=false
OK
Running test_request_body_type file and response type string and sync=false
OK
Running test_request_body_type file and response type byteArray and sync=false
OK
Running test_request_body_type file and response type byteArrays and sync=false
OK
Running test_request_body_type file and response type InputStream and sync=false
OK
Running test_request_body_type file and response type file and sync=false
OK
Running test_request_body_type string and response type string and sync=true
OK
Running test_request_body_type string and response type byteArray and sync=true
OK
Running test_request_body_type string and response type byteArrays and sync=true
OK
Running test_request_body_type string and response type InputStream and sync=true
OK
Running test_request_body_type string and response type file and sync=true
OK
Running test_request_body_type byteArray and response type string and sync=true
OK
Running test_request_body_type byteArray and response type byteArray and sync=true
OK
Running test_request_body_type byteArray and response type byteArrays and sync=true
OK
Running test_request_body_type byteArray and response type InputStream and sync=true
Timeout signalled after 480 seconds