请问java.lang.ClassCircularityError是什么错误？（急！！！）
17:22:22,812   ERROR   [STDERR]   java.lang.ClassCircularityError:   java/sql/DriverMana
ger
17:22:22,859   ERROR   [STDERR]           at   org.jboss.resource.adapter.jdbc.local.LocalMa
nagedConnectionFactory.isDriverLoadedForURL(LocalManagedConnectionFactory.java:4
60)
17:22:22,953   ERROR   [STDERR]           at   org.jboss.resource.adapter.jdbc.local.LocalMa
nagedConnectionFactory.checkDriver(LocalManagedConnectionFactory.java:420)
17:22:23,000   ERROR   [STDERR]           at   org.jboss.resource.adapter.jdbc.local.LocalMa
nagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.jav
a:130)
17:22:23,093   ERROR   [STDERR]           at   org.jboss.resource.connectionmanager.Internal
ManagedConnectionPool.createConnection(InternalManagedConnectionPool.java:236)
17:22:23,156   ERROR   [STDERR]           at   org.jboss.resource.connectionmanager.Internal
ManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:101)
17:22:23,234   ERROR   [STDERR]           at   org.jboss.resource.connectionmanager.Internal
ManagedConnectionPool.fillToMin(InternalManagedConnectionPool.java:202)
17:22:23,296   ERROR   [STDERR]           at   org.jboss.resource.connectionmanager.PoolFill
er$1.run(PoolFiller.java:63)
17:22:23,359   ERROR   [STDERR]           at   java.lang.Thread.run(Thread.java:534)

------解决方案--------------------
JBOSS中这种错误我以前遇到过，有可能还会导致内存溢出。查资料说是JDK的BUG，计划到6.0版本修正，也不知道实现没有。