JDK-5089488 : java.net.Socket checks for old-style impls
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.net
  • Affected Version: 6
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: solaris_9
  • CPU: generic
  • Submitted: 2004-08-19
  • Updated: 2005-08-19
  • Resolved: 2005-08-19
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Other JDK 6
1.4.2_11Fixed 6 betaFixed
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We note that BugID: 4674826 is fixed in 142 release.

However, java.net.Socket checks for old-style impls like this:

    private void checkOldImpl() {
    if (impl == null)
    // SocketImpl.connect() is a protected method, therefore we need to use
    // getDeclaredMethod, therefore we need permission to access the member
    try {
        AccessController.doPrivileged(new PrivilegedExceptionAction() {
            public Object run() throws NoSuchMethodException {
            Class[] cl = new Class[2];
            cl[0] = SocketAddress.class;
            cl[1] = Integer.TYPE;
            impl.getClass().getDeclaredMethod("connect", cl);
            return null;
    } catch (java.security.PrivilegedActionException e) {
        oldImpl = true;

However, my understanding is that this will exclude inherited methods on the impl. In our instance we have a BSocketImpl that inherits from ASocketImpl where only ASocketImpl has the appropriate connect() method. java.net.Socket therefor wrongly assumes that it is an old-style impl.

SUGGESTED FIX Webrev for the mustang: http://oldsunweb.ireland/~mm72272/webrev/current/webrev.5089488/ Webrev for Tiger: http://javaweb/~tm157638/webrevs/5089488/1.5.0/ Webrev for Mantis: http://javaweb/~tm157638/webrevs/5089488/1.4.2/

EVALUATION I guess we need to call getDeclaredMethod() for each super-class until we find the connect method.

CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: mustang

WORK AROUND The workaround is to define the method on both classes.

EVALUATION Indeed, getDeclaredMethod throws a NoSuchMethodException if the protected method was inherited, but getMethod() will throw the same exception no matter what because the method is protected. We need to find a better test for Mustang. ###@###.### 2004-08-27