Comment 2 for bug 725470

possibly related:

 INFO [FlushWriter:1] 2011-02-26 22:26:59,432 Memtable.java (line 155) Writing Memtable-Schema@431432310(2346 bytes, 5 operations)
ERROR [FlushWriter:1] 2011-02-26 22:26:59,433 AbstractCassandraDaemon.java (line 91) Fatal exception in thread Thread[FlushWriter:1,5,main]
java.lang.RuntimeException: java.io.FileNotFoundException: /var/lib/cassandra/data/system/Schema-tmp-e-61-Index.db (Too many open files)
        at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:636)
Caused by: java.io.FileNotFoundException: /var/lib/cassandra/data/system/Schema-tmp-e-61-Index.db (Too many open files)