<!-- BEGIN ERROR STACK TRACE
net.jforum.exceptions.ForumException: java.lang.reflect.InvocationTargetException
	at sun.reflect.GeneratedMethodAccessor253.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.jforum.Command.process(Command.java:114)
	at net.jforum.JForum.processCommand(JForum.java:219)
	at net.jforum.JForum.service(JForum.java:201)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:58)
	at cn.javass.ssonline.client.filter.subfilter.RepeatLoginSubFilter.filter(RepeatLoginSubFilter.java:37)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.UserCheckSubFilter.filter(UserCheckSubFilter.java:59)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.BlockUserSubFilter.filter(BlockUserSubFilter.java:47)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.BackURLSubFilter.filter(BackURLSubFilter.java:47)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.LoginFilter.doFilter(LoginFilter.java:84)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at net.jforum.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1354)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
	... 47 more
Caused by: net.jforum.exceptions.DatabaseException: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 

** BEGIN NESTED EXCEPTION ** 

java.net.SocketException
MESSAGE: 断开的管道 (Write failed)

STACKTRACE:

java.net.SocketException: 断开的管道 (Write failed)
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(Unknown Source)
	at java.net.SocketOutputStream.write(Unknown Source)
	at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
	at java.io.BufferedOutputStream.flush(Unknown Source)
	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2637)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:3124)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1149)
	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1262)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)
	at net.jforum.dao.generic.GenericUserDAO.selectById(GenericUserDAO.java:136)
	at net.jforum.view.forum.blog.AbstractBlogAction.getBlogUserId(AbstractBlogAction.java:53)
	at net.jforum.view.forum.blog.CategoryAction.showByCategory(CategoryAction.java:217)
	at sun.reflect.GeneratedMethodAccessor253.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.jforum.Command.process(Command.java:114)
	at net.jforum.JForum.processCommand(JForum.java:219)
	at net.jforum.JForum.service(JForum.java:201)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:58)
	at cn.javass.ssonline.client.filter.subfilter.RepeatLoginSubFilter.filter(RepeatLoginSubFilter.java:37)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.UserCheckSubFilter.filter(UserCheckSubFilter.java:59)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.BlockUserSubFilter.filter(BlockUserSubFilter.java:47)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.BackURLSubFilter.filter(BackURLSubFilter.java:47)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.LoginFilter.doFilter(LoginFilter.java:84)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at net.jforum.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1354)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)


** END NESTED EXCEPTION **


Last packet sent to the server was 0 ms ago.
	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2652)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:3124)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1149)
	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1262)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)
	at net.jforum.dao.generic.GenericUserDAO.selectById(GenericUserDAO.java:136)
	at net.jforum.view.forum.blog.AbstractBlogAction.getBlogUserId(AbstractBlogAction.java:53)
	at net.jforum.view.forum.blog.CategoryAction.showByCategory(CategoryAction.java:217)
	... 47 more
Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 

** BEGIN NESTED EXCEPTION ** 

java.net.SocketException
MESSAGE: 断开的管道 (Write failed)

STACKTRACE:

java.net.SocketException: 断开的管道 (Write failed)
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(Unknown Source)
	at java.net.SocketOutputStream.write(Unknown Source)
	at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
	at java.io.BufferedOutputStream.flush(Unknown Source)
	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2637)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:3124)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1149)
	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1262)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)
	at net.jforum.dao.generic.GenericUserDAO.selectById(GenericUserDAO.java:136)
	at net.jforum.view.forum.blog.AbstractBlogAction.getBlogUserId(AbstractBlogAction.java:53)
	at net.jforum.view.forum.blog.CategoryAction.showByCategory(CategoryAction.java:217)
	at sun.reflect.GeneratedMethodAccessor253.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.jforum.Command.process(Command.java:114)
	at net.jforum.JForum.processCommand(JForum.java:219)
	at net.jforum.JForum.service(JForum.java:201)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:58)
	at cn.javass.ssonline.client.filter.subfilter.RepeatLoginSubFilter.filter(RepeatLoginSubFilter.java:37)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.UserCheckSubFilter.filter(UserCheckSubFilter.java:59)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.BlockUserSubFilter.filter(BlockUserSubFilter.java:47)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.subfilter.BackURLSubFilter.filter(BackURLSubFilter.java:47)
	at cn.javass.ssonline.client.filter.subfilter.common.QueueSubFilterChain.doFilter(QueueSubFilterChain.java:50)
	at cn.javass.ssonline.client.filter.LoginFilter.doFilter(LoginFilter.java:84)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at net.jforum.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1354)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)


** END NESTED EXCEPTION **


Last packet sent to the server was 0 ms ago.
	... 57 more

URL is: /forum/blogCategory/showByCategory.html?categories_id=134&user_id=8636
END ERROR STACK TRACE-->

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