java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at java.nio.CharBuffer.put(CharBuffer.java:896)
at com.sun.enterprise.web.accesslog.CommonAccessLogFormatterImpl.appendRequestInfo(CommonAccessLogFormatterImpl.java:203)
at com.sun.enterprise.web.accesslog.CommonAccessLogFormatterImpl.appendLogEntry(CommonAccessLogFormatterImpl.java:133)
at com.sun.enterprise.web.accesslog.CombinedAccessLogFormatterImpl.appendLogEntry(CombinedAccessLogFormatterImpl.java:68)
at com.sun.enterprise.web.PEAccessLogValve.postInvoke(PEAccessLogValve.java:592)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:709)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at java.lang.Thread.run(Thread.java:662)

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