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Re: [las_users] Timeout Question

Aloha Roland
thanks for your follow-up. Right now I have LAS running, but it is still timing-out after 180 minutes. In order to prevent the time-out, I am having to restart the server every 120 min. Do you happen to know how I can do to prevent the LAS from timing out?
Right now I have MySQL Ver 14.7 Distrib 4.1.20, for redhat-linux-gnu (i686) using readline 4.3. The URL for the server is http://oceanwatch.pifsc.noaa.gov 

Any help with this would be really helpful...

Thanks again!

         Lucas


Roland Schweitzer wrote:

Hi Lucas,

Sorry we have not responded before now.
The issue is the communication between the MySQL database and the user interface server. What version of MySQL are you running? Is your server available to the public? If so, can you please send the URL? Thanks. 

Roland

Lucas Moxey wrote:

Dear fellow LAS community
I am writing because I need your help. I've installed LAS (LAS Ver 6.5.2.1 and Ferret Ver 6.05) in my server and it seems to work just fine. However, I noticed that if I don't use it for a while, I get an error message that says "las javax.servlet.ServletException: Communications link failure due to underlying exception:"
I am not sure, but it looks like the LAS is timing out. I've set up a cron job that will restart the LAS every 2 hours (this is less than the default LAS timeout of 180 min.), but this doesn't seem to make any difference. 

Below is the full error message that I am getting.

ANY suggestions & thoughts would be really helpful! Thanks!

                    Lucas

<html>
<body>
<h3>LAS server error</h3>
<p><b>You have encountered an unexpected User Interface error! Please <a href="dataset">click here</a> to return to the Datasets page. If this error persists please contact the LAS administrator for this site.</b></p> 
<p><hr><p>
The following error occurred:<br><pre>
javax.servlet.ServletException: Communications link failure due to underlying exception: 
** BEGIN NESTED EXCEPTION **
java.io.EOFException

STACKTRACE:

java.io.EOFException
 at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1842)
 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2288)
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2788)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531)
 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1622)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2379)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2306)
 at com.mysql.jdbc.Statement.executeQuery(Statement.java:1192)
at gov.noaa.pmel.tmap.db.DbaseObject.doDeserializeAggregate(DbaseObject.java:255) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:332) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:353) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:341) 
 at gov.noaa.pmel.tmap.db.Config.getConfigs(Config.java:91)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:83)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:25)
at gov.noaa.pmel.tmap.SessionFilter.initDefaultContexts(SessionFilter.java:128) at gov.noaa.pmel.tmap.SessionFilter.checkSession(SessionFilter.java:476) 
 at gov.noaa.pmel.tmap.SessionFilter.doFilter(SessionFilter.java:505)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 at gov.noaa.pmel.tmap.ExceptionFilter.doFilter(ExceptionFilter.java:24)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
 at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **
at gov.noaa.pmel.tmap.SessionFilter.initDefaultContexts(SessionFilter.java:339) at gov.noaa.pmel.tmap.SessionFilter.checkSession(SessionFilter.java:476) 
 at gov.noaa.pmel.tmap.SessionFilter.doFilter(SessionFilter.java:505)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 at gov.noaa.pmel.tmap.ExceptionFilter.doFilter(ExceptionFilter.java:24)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
 at java.lang.Thread.run(Thread.java:595)

Root cause of servlet exception was:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 
** BEGIN NESTED EXCEPTION **
java.io.EOFException

STACKTRACE:

java.io.EOFException
 at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1842)
 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2288)
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2788)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531)
 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1622)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2379)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2306)
 at com.mysql.jdbc.Statement.executeQuery(Statement.java:1192)
at gov.noaa.pmel.tmap.db.DbaseObject.doDeserializeAggregate(DbaseObject.java:255) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:332) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:353) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:341) 
 at gov.noaa.pmel.tmap.db.Config.getConfigs(Config.java:91)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:83)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:25)
at gov.noaa.pmel.tmap.SessionFilter.initDefaultContexts(SessionFilter.java:128) at gov.noaa.pmel.tmap.SessionFilter.checkSession(SessionFilter.java:476) 
 at gov.noaa.pmel.tmap.SessionFilter.doFilter(SessionFilter.java:505)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 at gov.noaa.pmel.tmap.ExceptionFilter.doFilter(ExceptionFilter.java:24)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
 at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **


 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2500)
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2788)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531)
 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1622)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2379)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2306)
 at com.mysql.jdbc.Statement.executeQuery(Statement.java:1192)
at gov.noaa.pmel.tmap.db.DbaseObject.doDeserializeAggregate(DbaseObject.java:255) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:332) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:353) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:341) 
 at gov.noaa.pmel.tmap.db.Config.getConfigs(Config.java:91)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:83)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:25)
at gov.noaa.pmel.tmap.SessionFilter.initDefaultContexts(SessionFilter.java:128) at gov.noaa.pmel.tmap.SessionFilter.checkSession(SessionFilter.java:476) 
 at gov.noaa.pmel.tmap.SessionFilter.doFilter(SessionFilter.java:505)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 at gov.noaa.pmel.tmap.ExceptionFilter.doFilter(ExceptionFilter.java:24)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
 at java.lang.Thread.run(Thread.java:595)
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 
** BEGIN NESTED EXCEPTION **
java.io.EOFException

STACKTRACE:

java.io.EOFException
 at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1842)
 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2288)
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2788)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531)
 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1622)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2379)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2306)
 at com.mysql.jdbc.Statement.executeQuery(Statement.java:1192)
at gov.noaa.pmel.tmap.db.DbaseObject.doDeserializeAggregate(DbaseObject.java:255) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:332) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:353) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:341) 
 at gov.noaa.pmel.tmap.db.Config.getConfigs(Config.java:91)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:83)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:25)
at gov.noaa.pmel.tmap.SessionFilter.initDefaultContexts(SessionFilter.java:128) at gov.noaa.pmel.tmap.SessionFilter.checkSession(SessionFilter.java:476) 
 at gov.noaa.pmel.tmap.SessionFilter.doFilter(SessionFilter.java:505)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 at gov.noaa.pmel.tmap.ExceptionFilter.doFilter(ExceptionFilter.java:24)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
 at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **


 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2500)
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2788)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531)
 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1622)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2379)
 at com.mysql.jdbc.Connection.execSQL(Connection.java:2306)
 at com.mysql.jdbc.Statement.executeQuery(Statement.java:1192)
at gov.noaa.pmel.tmap.db.DbaseObject.doDeserializeAggregate(DbaseObject.java:255) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:332) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:353) at gov.noaa.pmel.tmap.db.DbaseObject.deserializeAggregate(DbaseObject.java:341) 
 at gov.noaa.pmel.tmap.db.Config.getConfigs(Config.java:91)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:83)
 at gov.noaa.pmel.tmap.DatasetItem.getItems(DatasetItem.java:25)
at gov.noaa.pmel.tmap.SessionFilter.initDefaultContexts(SessionFilter.java:128) at gov.noaa.pmel.tmap.SessionFilter.checkSession(SessionFilter.java:476) 
 at gov.noaa.pmel.tmap.SessionFilter.doFilter(SessionFilter.java:505)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
 at gov.noaa.pmel.tmap.ExceptionFilter.doFilter(ExceptionFilter.java:24)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
 at java.lang.Thread.run(Thread.java:595)
</pre></body>
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