Re: Odd MySQL error...
Are your database and CF server on different networks? We saw this problem before our launch when we were just hitting the database (on a host) while developing locally. When the code and the database are on the same network, that problem went away for us. On Wed, Jun 23, 2010 at 1:34 PM, Mallory Woods mallory.wo...@gmail.comwrote: We have been dealing with a MySQL error for a little while and can't seem to figure out what is causing it. This error appears on our production server: Red Hat Linux Enterprise 64 bit MySQL 5.0.77 CF 9 This error happens any time, day or night and sometimes in multiple occurrences and from different pages. I am guessing that normal site operations continues after the user gets this error and refreshes their browser as we don't hear any complaints from users about it. The error appears in our logs and we would love to get rid of it. The main error is: * **Error Executing Database Query. Communications link failure Last packet sent to the server was 0 ms ago. brThe error occurred on line 6. * -- - Scott Brady http://www.scottbrady.net/ ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology-Michael-Dinowitz/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:334798 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Odd MySQL error...
Thanks for the suggestions. I will follow up on both tomorrow in the office. I will see if there are any other networking issues when this happens. Thanks again and if there are any other suggestions, please keep them coming. On Wed, Jun 23, 2010 at 4:01 PM, Matthew Small chestypul...@beachbum.netwrote: It sounds like a networking error more than an app error. You might try running Wireshark with a limited-size looping buffer to try to capture a trace of the problem. Also, do you have any other network issues during the time of the issue? We have been dealing with a MySQL error for a little while and can't seem to figure out what is causing it. This error appears on our production server: Red Hat Linux Enterprise 64 bit MySQL 5.0.77 CF 9 This error happens any time, day or night and sometimes in multiple occurrences and from different pages. I am guessing that normal site operations continues after the user gets this error and refreshes their browser as we don't hear any complaints from users about it. The error appears in our logs and we would love to get rid of it. The main error is: * **Error Executing Database Query. Communications link failure Last packet sent to the server was 0 ms ago. brThe error occurred on line 6. * Stack Trace: Message Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. StackTrace java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2455) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2906) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2895) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3438) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement. java:1761) at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement. java:1021) at coldfusion.server.j2ee.sql.JRunPreparedStatement. execute(JRunPreparedStatement.java:91) at coldfusion.sql.Executive.executeQuery(Executive.java:1245) at coldfusion.sql.Executive.executeQuery(Executive.java:1008) at coldfusion.sql.Executive.executeQuery(Executive.java:939) at coldfusion.sql.SqlImpl.execute(SqlImpl.java:341) at coldfusion.tagext.sql.QueryTag.executeQuery(QueryTag.java:843) at coldfusion.tagext.sql.QueryTag.doEndTag(QueryTag.java:533) at cfaction2epage2edefault2ecfm19563856._factor4(/var/www/html/action. page.default.cfm:6) at cfaction2epage2edefault2ecfm19563856.runPage(/var/www/html/action.page. default.cfm:1) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722) at cfindex2ecfm500695976.runPage(/var/www/html/index.cfm:56) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:363) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter. java:48) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:87) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70) at coldfusion.filter.ClientScopePersistenceFilter. invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:53) at coldfusion.CfmServlet.service(CfmServlet.java:200) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet. java:89) at jrun.servlet.FilterChain.doFilter(FilterChain.java:86) at coldfusion.monitor.event.MonitoringServletFilter. doFilter(MonitoringServletFilter.java:42) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter. java:46) at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at jrun.servlet.FilterChain.service(FilterChain.java:101) at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106) at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42) at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher. java:286) at jrun.servlet.ServletEngineService.dispatch(ServletEngineService. java:543) at
Re: Odd MySQL error...
On Wednesday 23 Jun 2010 21:27:06 you wrote: If looks like your server is getting random intermittent connection drops from your MySQL server (I'm assuming it's remote) You could turn off persistent connections too. -- Tom Chiverton Helping to evangelistically innovate eigth-generation interfaces as part of the IT team of the year 2010, '09 and '08 This email is sent for and on behalf of Halliwells LLP. Halliwells LLP is a limited liability partnership registered in England and Wales under registered number OC307980 whose registered office address is at Halliwells LLP, 3 Hardman Square, Spinningfields, Manchester, M3 3EB. A list of members is available for inspection at the registered office together with a list of those non members who are referred to as partners. We use the word “partner” to refer to a member of the LLP, or an employee or consultant with equivalent standing and qualifications. Regulated by the Solicitors Regulation Authority. CONFIDENTIALITY This email is intended only for the use of the addressee named above and may be confidential or legally privileged. If you are not the addressee you must not read it and must not use any information contained in nor copy it nor inform any person other than Halliwells LLP or the addressee of its existence or contents. If you have received this email in error please delete it and notify Halliwells LLP IT Department on 0870 365 2500. For more information about Halliwells LLP visit www.halliwells.co ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology-Michael-Dinowitz/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:334806 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Odd MySQL error...
We have been dealing with a MySQL error for a little while and can't seem to figure out what is causing it. This error appears on our production server: Red Hat Linux Enterprise 64 bit MySQL 5.0.77 CF 9 This error happens any time, day or night and sometimes in multiple occurrences and from different pages. I am guessing that normal site operations continues after the user gets this error and refreshes their browser as we don't hear any complaints from users about it. The error appears in our logs and we would love to get rid of it. The main error is: * **Error Executing Database Query. Communications link failure Last packet sent to the server was 0 ms ago. brThe error occurred on line 6. * Stack Trace: Message Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. StackTrace java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2455) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2906) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2895) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3438) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761) at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1021) at coldfusion.server.j2ee.sql.JRunPreparedStatement.execute(JRunPreparedStatement.java:91) at coldfusion.sql.Executive.executeQuery(Executive.java:1245) at coldfusion.sql.Executive.executeQuery(Executive.java:1008) at coldfusion.sql.Executive.executeQuery(Executive.java:939) at coldfusion.sql.SqlImpl.execute(SqlImpl.java:341) at coldfusion.tagext.sql.QueryTag.executeQuery(QueryTag.java:843) at coldfusion.tagext.sql.QueryTag.doEndTag(QueryTag.java:533) at cfaction2epage2edefault2ecfm19563856._factor4(/var/www/html/action.page.default.cfm:6) at cfaction2epage2edefault2ecfm19563856.runPage(/var/www/html/action.page.default.cfm:1) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722) at cfindex2ecfm500695976.runPage(/var/www/html/index.cfm:56) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:363) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:87) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70) at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:53) at coldfusion.CfmServlet.service(CfmServlet.java:200) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89) at jrun.servlet.FilterChain.doFilter(FilterChain.java:86) at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46) at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at jrun.servlet.FilterChain.service(FilterChain.java:101) at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106) at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42) at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286) at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543) at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203) at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320) at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428) at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266) at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66) When going to the page that thew this error, I can't force the error. Suggestions? Anyone? Thanks, Mal ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology-Michael-Dinowitz/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:334775
Re: Odd MySQL error...
If looks like your server is getting random intermittent connection drops from your MySQL server (I'm assuming it's remote) You could just wrap what you are trying to do in a cftry tag with a cfcatch that could prompt to refresh or however else you would want to handle the issue. Otherwise you are going to have to look deep in to whats causing the random packet losses. Jim Eisenhauer ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology-Michael-Dinowitz/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:334780 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Odd MySQL error...
It sounds like a networking error more than an app error. You might try running Wireshark with a limited-size looping buffer to try to capture a trace of the problem. Also, do you have any other network issues during the time of the issue? We have been dealing with a MySQL error for a little while and can't seem to figure out what is causing it. This error appears on our production server: Red Hat Linux Enterprise 64 bit MySQL 5.0.77 CF 9 This error happens any time, day or night and sometimes in multiple occurrences and from different pages. I am guessing that normal site operations continues after the user gets this error and refreshes their browser as we don't hear any complaints from users about it. The error appears in our logs and we would love to get rid of it. The main error is: * **Error Executing Database Query. Communications link failure Last packet sent to the server was 0 ms ago. brThe error occurred on line 6. * Stack Trace: Message Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. StackTrace java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost. at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2455) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2906) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2895) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3438) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement. java:1761) at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement. java:1021) at coldfusion.server.j2ee.sql.JRunPreparedStatement. execute(JRunPreparedStatement.java:91) at coldfusion.sql.Executive.executeQuery(Executive.java:1245) at coldfusion.sql.Executive.executeQuery(Executive.java:1008) at coldfusion.sql.Executive.executeQuery(Executive.java:939) at coldfusion.sql.SqlImpl.execute(SqlImpl.java:341) at coldfusion.tagext.sql.QueryTag.executeQuery(QueryTag.java:843) at coldfusion.tagext.sql.QueryTag.doEndTag(QueryTag.java:533) at cfaction2epage2edefault2ecfm19563856._factor4(/var/www/html/action. page.default.cfm:6) at cfaction2epage2edefault2ecfm19563856.runPage(/var/www/html/action.page. default.cfm:1) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722) at cfindex2ecfm500695976.runPage(/var/www/html/index.cfm:56) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:363) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter. java:48) at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at coldfusion.filter.PathFilter.invoke(PathFilter.java:87) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70) at coldfusion.filter.ClientScopePersistenceFilter. invoke(ClientScopePersistenceFilter.java:28) at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:53) at coldfusion.CfmServlet.service(CfmServlet.java:200) at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet. java:89) at jrun.servlet.FilterChain.doFilter(FilterChain.java:86) at coldfusion.monitor.event.MonitoringServletFilter. doFilter(MonitoringServletFilter.java:42) at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter. java:46) at jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at jrun.servlet.FilterChain.service(FilterChain.java:101) at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106) at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42) at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher. java:286) at jrun.servlet.ServletEngineService.dispatch(ServletEngineService. java:543) at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService. java:203) at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool. java:320) at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool. java:428) at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool. java:266) at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66) When going to the page that
