[RFR] 8184328: JDK8u131 socketRead0 hang at SSL read (original) (raw)

Xuelei Fan xuelei.fan at oracle.com
Fri Sep 15 23:32:23 UTC 2017

On 9/15/2017 8:22 AM, Rob McKenna wrote:

This test calls close directly. (3rd last line in the stack)

I believe this is the only possible stack (with the new parameter) once autoclose is set to false. If autoclose is true we'd skip the call to waitForClose and just go directly to Socket.close() unless I'm mistaken. I did not find the call to fatal() in the current implementation. I think you mean you added the call to fatal() in your update so that when timeout, a fatal() will always get called?

Thinking about two things:

  1. application have to set receiving timeout in order to get receiving timeout. I have a concern about it, as described in other comments.

  2. can we close the super socket? It is a surprise to me to close super socket even we don't allocate it. It does not feel right to me, but this is the current behavior. All right, I get your point.

Xuelei

-Rob

On 15/09/17 07:55, Xuelei Fan wrote: On 9/15/2017 7:41 AM, Rob McKenna wrote:

On 15/09/17 07:07, Xuelei Fan wrote:

On 9/15/2017 7:00 AM, Rob McKenna wrote:

When we call close() on the SSLSocket that calls close() on the underlying java Socket which closes the native socket.

Sorry, I did not get the point. Please see the close() implementation of SSLSocket (sun.security.ssl.SSLSocketImpl.close()) about the details. Running my original test against an instrumented 8u-dev produces the following: java.lang.Exception: Stack trace at java.lang.Thread.dumpStack(Thread.java:1336) at java.net.Socket.close(Socket.java:1491) at sun.security.ssl.BaseSSLSocketImpl.close(BaseSSLSocketImpl.java:624) at sun.security.ssl.SSLSocketImpl.closeSocket(SSLSocketImpl.java:1579) at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1980) at sun.security.ssl.SSLSocketImpl.waitForClose(SSLSocketImpl.java:1793) at sun.security.ssl.SSLSocketImpl.closeSocket(SSLSocketImpl.java:1592) at sun.security.ssl.SSLSocketImpl.closeInternal(SSLSocketImpl.java:1726) at sun.security.ssl.SSLSocketImpl.close(SSLSocketImpl.java:1615) at ssl.SSLClient.close(SSLClient.java:143) at ssl.SocketTimeoutCloseHang.ReadHang.testSSLServer(ReadHang.java:77) It is just one possible stacks of many. There are cases where no fatal() get called. For example, application call close() method directly. Xuelei

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