[Bug libgcj/14759] New: ServerSocketChannel causes Selector.select() to return immediatly

[Bug libgcj/14759] New: ServerSocketChannel causes Selector.select() to return immediatly

[debian-gcc at lists dot debian dot org]

[forwarded from http://bugs.debian.org/240550]

If a ServerSocketChannel has been registered for SelectionKey.OP_ACCEPT 
at a Selector, select() will return immediatly with OP_ACCEPT on that 
Channel, even when there is no connection waiting. 
 
See example attached.


Compile and run it with: 
gcj-3.3 --main=Server Server.java && ./a.out 
 
and it will output: 
Before selector 
Something was selected. 
Before accept. 
 
and hang in the ServerSocket.accept() method until a connection 
happens. 

Using gcj-3.4 (20040314):

Before selector  [waiting]
Something was selected.
Before accept.
java.nio.channels.IllegalBlockingModeException
   at java.net.ServerSocket.implAccept(java.net.Socket)
(/usr/lib/gcc-snapshot/lib/libgcj.so.5.0.0)
   at gnu.java.nio.NIOServerSocket.accept()
(/usr/lib/gcc-snapshot/lib/libgcj.so.5.0.0)
   at Server.main(java.lang.String[]) (Unknown Source)

-- 
           Summary: ServerSocketChannel causes Selector.select() to return
                    immediatly
           Product: gcc
           Version: 3.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
                CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
                    dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14759

[Bug libgcj/14759] ServerSocketChannel causes Selector.select() to return immediatly

[debian-gcc at lists dot debian dot org]

------- Additional Comments From debian-gcc at lists dot debian dot org  2004-03-28 10:12 -------
Created an attachment (id=6007)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6007&action=view)
example


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14759

[Bug libgcj/14759] ServerSocketChannel causes Selector.select() to return immediatly

[bofh-reg-gcc at diegeekdie dot com]

------- Additional Comments From bofh-reg-gcc at diegeekdie dot com  2004-03-30 05:59 -------
Running the program with strace shows that two sockets are created (fd 5 and 6). The second socket (fd 6) is the one that is later given an address with bind(2), the first socket (fd 5) is the one that is used in the select(2) call.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14759

[Bug libgcj/14759] ServerSocketChannel causes Selector.select() to return immediatly

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #6007|text/x-java                 |text/plain
          mime type|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14759

[Bug libgcj/14759] ServerSocketChannel causes Selector.select() to return immediatly

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-04 06:21 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-04-04 06:21:59
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14759

[Bug libgcj/14759] ServerSocketChannel causes Selector.select() to return immediatly

[konqueror at gmx dot de]

------- Additional Comments From konqueror at gmx dot de  2005-01-15 22:30 -------
I'm working on it. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |konqueror at gmx dot de
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14759