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

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at com.sun.grizzly.http.ProcessorTask.action(
at com.sun.grizzly.tcp.Request.action(
at org.apache.catalina.connector.Request.asyncComplete(
at test.TestServlet.doGet(
at javax.servlet.http.HttpServlet.service(
at javax.servlet.http.HttpServlet.service(
at org.apache.catalina.core.StandardWrapper.service(
at org.apache.catalina.core.ApplicationDispatcher.doInvoke(
at org.apache.catalina.core.ApplicationDispatcher.invoke(
at org.apache.catalina.core.ApplicationDispatcher.processRequest(
at org.apache.catalina.core.ApplicationDispatcher.doDispatch(
at org.apache.catalina.core.ApplicationDispatcher.dispatch(
at org.apache.catalina.core.ApplicationDispatcher.dispatch(
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(
at java.util.concurrent.ThreadPoolExecutor$

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