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java.lang.NullPointerException: null	at hprose.server.HproseService.getErrorMessage(HproseService.java:512)	at hprose.server.HproseService.sendError(HproseService.java:522)	at hprose.server.HproseHttpService1.onTimeout(HproseHttpService.java:208)	at org.apache.catalina.core.AsyncListenerWrapper.fireOnTimeout(AsyncListenerWrapper.java:40)	at org.apache.catalina.core.AsyncContextImpl.timeout(AsyncContextImpl.java:155)	at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:292)	at org.apache.coyote.http11.AbstractHttp11Processor.asyncDispatch(AbstractHttp11Processor.java:1715)	at org.apache.coyote.AbstractProtocolAbstractConnectionHandler.process(AbstractProtocol.java:652)	at org.apache.tomcat.util.net.NioEndpointSocketProcessor.doRun(NioEndpoint.java:1500)	at org.apache.tomcat.util.net.NioEndpointSocketProcessor.run(NioEndpoint.java:1456)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThreadWrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)