java/net/httpclient/BasicWebSocketAPITest.java failed with "java.lang.AssertionError"

----------System.out:(4/114)----------
[TestNG] Running:
  java/net/httpclient/BasicWebSocketAPITest.java

test BasicWebSocketAPITest.builder(): success
----------System.err:(9/709)----------
java.lang.AssertionError
at java.net.http.RawChannel.read(java.httpclient@9-internal/RawChannel.java:128)
at java.net.http.WSReceiver.getData(java.httpclient@9-internal/WSReceiver.java:121)
at java.net.http.WSReceiver.react(java.httpclient@9-internal/WSReceiver.java:81)
at java.net.http.WSSignalHandler.lambda$new$1(java.httpclient@9-internal/WSSignalHandler.java:80)
at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@9-internal/ThreadPoolExecutor.java:1158)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@9-internal/ThreadPoolExecutor.java:632)
at java.lang.Thread.run(java.base@9-internal/Thread.java:804)