A socketchannel connect test is setup up to loop 2000
times but never completes at that scale on Solaris or
Windows. On Solaris, the first two or three executions
fail ~500, with an IOException: too many open files.
Subsequent executions then fail around ~300 iterations
with either a SocketException or an IOException each with
the message: Bad file number.

Reliability increases as the iteration loop
gets smaller. At 500 there are more completions,
no open file errors, but the same variety of
Socket and IOExceptions occur when reexecuted.
A loop of 200 iterations of this test consistently
completes without error.

output from the exceptions:

java.io.IOException: Too many open files
        at sun.nio.ch.IOUtil.initPipe(Native Method)
        at sun.nio.ch.SelectorImpl.<init>(SelectorImpl.java:67)
        at sun.nio.ch.SelectorProviderImpl.openSelector(SelectorProviderImpl.java:33)
        at conScaleTest.<init>(conScaleTest.java:24)
        at conScaleTest.main(conScaleTest.java:91)

----------------------------------

java.net.SocketException: Bad file number
        at sun.nio.ch.SocketChannelImpl.connect0(Native Method)
        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:182)
        at conScaleTest.<init>(conScaleTest.java:36)
        at conScaleTest.main(conScaleTest.java:100)

---------------------------------

java.io.IOException: Bad file number
        at sun.nio.ch.FileDispatcher.close0(Native Method)
        at sun.nio.ch.SocketDispatcher.close(SocketDispatcher.java:39)
        at sun.nio.ch.SocketChannelImpl.implCloseSelectableChannel(SocketChannelImpl.java:228)
        at java.nio.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelectableChannel.java:170)
        at java.nio.spi.AbstractChannel.close(AbstractChannel.java:96)
        at conScaleTest.<init>(conScaleTest.java:64)
        at conScaleTest.main(conScaleTest.java:100)



Windows
--------
Windows failures are slightly different. The test (and java bits)
executed from a networked share doesn't fail as early as on Solaris.
The first few executions fail ~1400th iteration:

read failed
java.io.IOException: Socket close failed
        at sun.nio.ch.SocketDispatcher.close0(Native Method)
        at sun.nio.ch.SocketDispatcher.close(SocketDispatcher.java:44)
        at sun.nio.ch.SocketChannelImpl.implCloseSelectableChannel(SocketChannel
Impl.java:228)
        at java.nio.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelec
tableChannel.java:170)
        at java.nio.spi.AbstractChannel.close(AbstractChannel.java:96)
        at conScaleTest.write(conScaleTest.java:84)
        at conScaleTest.<init>(conScaleTest.java:30)
        at conScaleTest.main(conScaleTest.java:91)


Thereafter subsequent executions fail very early, ~250 with
the following exception:

java.net.SocketException: No such file or directory
        at sun.nio.ch.SocketChannelImpl.connect0(Native Method)
        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:182)
        at conScaleTest.<init>(conScaleTest.java:27)
        at conScaleTest.main(conScaleTest.java:91)


Infrequently, subsequent executions threw a ConnectException: Too many
open files.

Test file attached.

krystyna.polomski@Eng 2001-04-19
The bad file numbers are gone in b61. Too many open files can be remedied
by closing the RSelector in the test (see conScaleTest2.java attached with
this version), however the reliability of this test particularly on windows is still poor.

Closing the selector, on solaris we get 1976 successful connects out of
2000. The remaining failures come from ClosedChannelExceptions.

Closing the selector, on windows only 9 successful connects out of 2000.
The remaining failures are ClosedChannelExceptions. What is the cause of
these ClosedChannelExceptions?

The original test on b61 (w/out closing the selector) still produces
a java.net.SocketException: too many open files on Solaris. Can a
better exception message be sent? On windows, the original test
behaves as the one with the closed selector, 13 succcessful connects
out of 2000.


krystyna.polomski@Eng 2001-05-23
closing this as verified build65--new connect bugs
ahve been filed to coverconnect issues. see 4462481.