PROBLEM DESCRIPTION
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The following message was repeated thousand times per second, filling up the console log.

<Aug 19, 2014 6:10:17 AM PDT> <Warning> <javax.management.remote.misc>
<BEA-000000> <The server has decided to close this client connection.>

DIAGNOSTIC ANALYSIS (REQUIRED):
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From thread dump taken on Aug20.

Thread 21 got in STUCK state awaiting the lock on : - locked
<0x00000000ca544e78> (a
oracle.as.jmx.framework.wls.spi.WLSOracleStandardEmitterRootConfigMBean)

Please find the below snippet:
"[STUCK] ExecuteThread: '21' for queue: 'weblogic.kernel.Default
(self-tuning)'" daemon prio=10 tid=0x00002aaac36af000 nid=0x4863 waiting on
condition [0x0000000047be7000]
   java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000000ce4488a0> (a oracle.as.config.notification.filesystem.DocumentChangeNotifierImpl$TypedFutur
eTask)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:425)
at java.util.concurrent.FutureTask.get(FutureTask.java:187)
at oracle.as.config.notification.filesystem.DocumentChangeNotifierImpl.runAndWait (DocumentChangeNotifierImpl.java:238)
at oracle.as.config.notification.filesystem.DocumentChangeNotifierImpl.lock(DocumentChangeNotifierImpl.java:331)
at oracle.as.jmx.framework.util.HashingDataSource.getOutputStream(HashingDataSource.java:156)
at oracle.as.config.persistence.jaxb.JAXBXmlPersistenceManagerImpl.persist(JAXBXmlPersistenceManagerImpl.java:254)
at oracle.as.jmx.framework.util.PMConfigMBeanSupport.doSave(PMConfigMBeanSupport.java:175)
at oracle.as.jmx.framework.util.ConfigMBeanSupport.save(ConfigMBeanSupport.java:171)
at oracle.as.jmx.framework.standardmbeans.spi.OracleStandardEmitterConfigMBean$OptimizedPersistableInterceptor.save(OracleStandardEmitterConfigMBean.java:1307)
- locked <0x00000000ca544e78> (a oracle.as.jmx.framework.wls.spi.WLSOracleStandardEmitterRootConfigMBean)
at oracle.as.jmx.framework.standardmbeans.spi.OracleStandardEmitterConfigMBean.persistConfiguration(OracleStandardEmitterConfigMBean.java:523)
at oracle.as.jmx.framework.standardmbeans.spi.OracleStandardEmitterConfigMBean.doPostProcess(OracleStandardEmitterConfigMBean.java:480)
at oracle.as.jmx.framework.standardmbeans.spi.OracleStandardEmitterConfigMBean.postProcess(OracleStandardEmitterConfigMBean.java:449)
at oracle.as.jmx.framework.standardmbeans.spi.OracleStandardEmitterConfigMBean.setAttribute(OracleStandardEmitterConfigMBean.java:716)
- locked <0x00000000ca544e78> (a oracle.as.jmx.framework.wls.spi.WLSOracleStandardEmitterRootConfigMBean)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.setAttribute(DefaultMBeanServerInterceptor.java:746)
at com.sun.jmx.mbeanserver.JmxMBeanServer.setAttribute(JmxMBeanServer.java:739)