[junit] java.util.ConcurrentModificationException
[junit] at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
[junit] at java.util.HashMap$KeyIterator.next(HashMap.java:828)
[junit] at com.google.common.collect.Iterators$8.next(Iterators.java:750)
[junit] at org.apache.cassandra.db.ColumnFamilyStore.all(ColumnFamilyStore.java:1509)
[junit] at org.apache.cassandra.db.MeteredFlusher.countFlushingBytes(MeteredFlusher.java:118)
[junit] at org.apache.cassandra.db.MeteredFlusher.run(MeteredFlusher.java:45)
[junit] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
[junit] at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
[junit] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
[junit] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
[junit] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
[junit] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
[junit] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
[junit] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
[junit] at java.lang.Thread.run(Thread.java:662)