gistfile1.txt

forcing a compaction on CF with indexed cols occasionally causes:
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ERROR 14:33:31,430 Uncaught exception in thread Thread[CompactionExecutor:1,5,main]
java.util.concurrent.ExecutionException: java.io.IOException: Keys must be written in ascending order.
	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
	at java.util.concurrent.FutureTask.get(FutureTask.java:83)
	at org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:87)
	at org.apache.cassandra.db.CompactionManager$CompactionExecutor.afterExecute(CompactionManager.java:659)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:888)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: Keys must be written in ascending order.
	at org.apache.cassandra.io.sstable.SSTableWriter.beforeAppend(SSTableWriter.java:69)
	at org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:86)
	at org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:350)
	at org.apache.cassandra.db.CompactionManager$5.call(CompactionManager.java:227)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	... 2 more