#237 [engine] comodification exception

I have observed the following expression several times. Code is
1.4.7.

2005-05-12 20:13:01,996 DEBUG
openwfe.org.engine.impl.expool.FileExpressionStore -
storeExpression() took 1 ms
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:
782)
at java.util.HashMap$ValueIterator.next(HashMap.java:812)
at
openwfe.org.engine.impl.expool.InMemoryExpressionPool.contentIte
rator(InMemoryExpressionPool.java:284)
at
openwfe.org.engine.impl.expool.SimpleExpressionPool.purge(Simple
ExpressionPool.java:576)
at
openwfe.org.engine.impl.expool.SimpleExpressionPool$1.run(Simple
ExpressionPool.java:147)
at java.util.TimerThread.mainLoop(Timer.java:432)
at java.util.TimerThread.run(Timer.java:382)
2005-05-12 20:13:01,998 DEBUG
openwfe.org.engine.impl.expool.InMemoryExpressionPool -
doStoreOperation() 'storeExpression' own t
hread launched.

[John Mettraux]

Logged In: YES
user_id=171878

removing it...