Test
java/nio/channels/Selector/HelperSlowToDie.java

fails on Linux (Ubuntu 9.10) with exception. The problem is that on most Linuxes, max number of open files is 1024. The test creates exactly 1024, however some other processes (or VM itself) may be using some already.

Either the number of channels created could be decreased or test can be changed to autodetect max number of channels (i.e. create them until it's 1024 or exception occurs).

java.net.SocketException: Too many open files
        at sun.nio.ch.Net.socket0(Native Method)
        at sun.nio.ch.Net.socket(Net.java:300)
        at sun.nio.ch.Net.socket(Net.java:294)
        at sun.nio.ch.SocketChannelImpl.<init>(SocketChannelImpl.java:101)
        at sun.nio.ch.SelectorProviderImpl.openSocketChannel(SelectorProviderImpl.java:60)
        at java.nio.channels.SocketChannel.open(SocketChannel.java:142)
        at HelperSlowToDie.main(HelperSlowToDie.java:44)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:613)
        at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
        at java.lang.Thread.run(Thread.java:717)