tapestry5.0.11类中出现的异常

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ERROR  handleRequestException, Processing of request failed with uncaught exception: The page pool for page 'sysmonitor/framework/Topo' (in locale zh_CN) has been exausted: there are 20 instances currently being used and no more can be created. Try increasing the hard limit (symbol tapestry.page-pool.hard-limit) to allow additional instances to be created, or increasing the soft wait (symbol tapestry.page-pool.soft-wait) to trade away some throughput for more efficient use of page instances.
java.lang.RuntimeException: The page pool for page 'sysmonitor/framework/Topo' (in locale zh_CN) has been exausted: there are 20 instances currently being used and no more can be created. Try increasing the hard limit (symbol tapestry.page-pool.hard-limit) to allow additional instances to be created, or increasing the soft wait (symbol tapestry.page-pool.soft-wait) to trade away some throughput for more efficient use of page instances.
at org.apache.tapestry.internal.services.PagePoolCache.checkout(PagePoolCache.java:177)
at org.apache.tapestry.internal.services.PagePoolImpl.checkout(PagePoolImpl.java:107)
at $PagePool_11a96033cf6.checkout($PagePool_11a96033cf6.java)
at org.apache.tapestry.internal.services.RequestPageCacheImpl.get(RequestPageCacheImpl.java:43)
at $RequestPageCache_11a96033cf5.get($RequestPageCache_11a96033cf5.java)
at $RequestPageCache_11a96033cbe.get($RequestPageCache_11a96033cbe.java)
at org.apache.tapestry.internal.services.RequestEncodingInitializerImpl.initializeRequestEncoding(RequestEncodingInitializerImpl.java:41)
at $RequestEncodingInitializer_11a96033cec.initializeRequestEncoding($RequestEncodingInitializer_11a96033cec.java)
at org.apache.tapestry.internal.services.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:115)
at $Dispatcher_11a96033ced.dispatch($Dispatcher_11a96033ced.java)
at $Dispatcher_11a96033cde.dispatch($Dispatcher_11a96033cde.java)
at org.apache.tapestry.services.TapestryModule$13.service(TapestryModule.java:944)
at com.huawei.icd.services.SysmonitorModule$2.service(SysmonitorModule.java:86)
at $RequestFilter_11a96033cdc.service($RequestFilter_11a96033cdc.java)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at com.huawei.icd.services.SysmonitorModule$3.service(SysmonitorModule.java:138)
at $RequestFilter_11a96033cdd.service($RequestFilter_11a96033cdd.java)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at org.apache.tapestry.internal.services.LocalizationFilter.service(LocalizationFilter.java:42)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at org.apache.tapestry.services.TapestryModule$3.service(TapestryModule.java:553)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at org.apache.tapestry.services.TapestryModule$2.service(TapestryModule.java:520)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at org.apache.tapestry.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:79)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at org.apache.tapestry.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:93)
at org.apache.tapestry.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:84)
at org.apache.tapestry.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:77)
at org.apache.tapestry.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:106)
at $RequestHandler_11a96033cdf.service($RequestHandler_11a96033cdf.java)
at $RequestHandler_11a96033cd5.service($RequestHandler_11a96033cd5.java)
at org.apache.tapestry.services.TapestryModule$12.service(TapestryModule.java:924)
at org.apache.tapestry.upload.internal.services.MultipartServletRequestFilter.service(MultipartServletRequestFilter.java:43)
at $HttpServletRequestHandler_11a96033cd6.service($HttpServletRequestHandler_11a96033cd6.java)
at org.apache.tapestry.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
at $HttpServletRequestFilter_11a96033cd4.service($HttpServletRequestFilter_11a96033cd4.java)
at $HttpServletRequestHandler_11a96033cd6.service($HttpServletRequestHandler_11a96033cd6.java)
at $HttpServletRequestHandler_11a96033cd2.service($HttpServletRequestHandler_11a96033cd2.java)
at org.apache.tapestry.TapestryFilter.doFilter(TapestryFilter.java:168)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)