Hi Ethan,
my specs have been wrong, we are already running tomcat 6.0.20.
We have the restart of the Spring Framework for thredds each night,
while we just had once the 'Too many open files' message. Does anybody
else see the line
'INFO: Destroying Spring FrameworkServlet '...''
each night in the tomcat localhost.YYYY-MM-HH.log logfile? It's not a
tomcat restart, just an internal Spring webapplication restart.
Heiko
Ethan Davis wrote:
Hi Heiko,
An automatic, nightly shutdown of the TDS is not normal behavior. We
keep the TDS up for long periods of time and I've never seen a
spontaneous shutdown of the TDS. I'm wondering if the "too many open
files" exceptions are causing the problem. Do you get those exceptions
before every shutdown?
Also, what version of Tomcat 6 are you running? From this page
http://www.nabble.com/NIO-Connector:-Too-many-open-files-td23655733.html
it looks like there was a file descriptor leak in nio-connector up
through Tomcat 6.0.18. If you are running Tomcat 6.0.18, can you upgrade
to Tomcat 6.0.20 and see if that helps with the "too many open files"
exception.
Ethan
Heiko Klein wrote:
Hi,
I've just had some problems with our tomcat server running thredds, and
I would like to find out more about the reasons for it. We're running
tomcat 6 (apache proxy, nio-connector) and thredds 4.0.25 on linux 32bit
with java6.
Each night, between 12:25 and 12:30 AM, the thredds webapplication seems
to be restarted internally (localhost.2009-09-04.log):
Sep 4, 2009 12:29:04 AM org.apache.catalina.core.ApplicationContext log
INFO: Destroying Spring FrameworkServlet 'catalogService'
Sep 4, 2009 12:29:04 AM org.apache.catalina.core.ApplicationContext log
INFO: Destroying Spring FrameworkServlet 'root'
...
Sep 4, 2009 12:29:11 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'cdmRemote'
Sep 4, 2009 12:29:11 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'admin'
Sep 4, 2009 12:29:11 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'wms'
Is this the normal behaviour. Why is the restart needed? Where is it
scheduled?
Some days ago, this restart didn't work and crashed tomcat:
...
Sep 1, 2009 12:30:14 AM org.apache.catalina.core.ApplicationContext log
INFO: Destroying Spring FrameworkServlet 'wms'
Sep 1, 2009 12:30:14 AM org.apache.catalina.core.ApplicationContext log
INFO: Shutting down log4j
Sep 1, 2009 12:30:15 AM org.apache.catalina.core.StandardContext
listenerStop
SEVERE: Exception sending context destroyed event to listener instance
of class thredds.server.config.TdsConfigContextListener
java.lang.NoClassDefFoundError: org/apache/log4j/helpers/NullEnumeration
at org.apache.log4j.Category.getAllAppenders(Category.java:413)
at
org.apache.log4j.Category.closeNestedAppenders(Category.java:226)
at org.apache.log4j.Hierarchy.shutdown(Hierarchy.java:448)
at org.apache.log4j.LogManager.shutdown(LogManager.java:238)
at
org.springframework.util.Log4jConfigurer.shutdownLogging(Log4jConfigurer.java:117)
...
INFO: Closing Spring root WebApplicationContext
We've also experience some 'Too many open files' Exception around that
time:
SEVERE: Socket accept failed
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:145)
at
org.apache.tomcat.util.net.NioEndpoint$Acceptor.run(NioEndpoint.java:1266)
at java.lang.Thread.run(Thread.java:619)
and
Sep 1, 2009 12:30:16 AM org.apache.catalina.startup.ContextConfig
defaultWebConfig
SEVERE: Missing default web.xml, using application web.xml only
conf/web.xml /metno/eksternweb/thredds/apache-tomcat-6.0.20/conf/web.xml
java.io.FileNotFoundException:
/metno/eksternweb/thredds/apache-tomcat-6.0.20/conf/web.xml (Too many
open files)
Has somebody else seen the (Too many open files) with thredds, or is
something in our configuraton (machine/tomcat) wrong? For more
information , please see the attached log-files.
Best regards,
Heiko
--
Dr. Heiko Klein Tel. + 47 22 96 32 58
Development Section / IT Department Fax. + 47 22 69 63 55
Norwegian Meteorological Institute http://www.met.no
P.O. Box 43 Blindern 0313 Oslo NORWAY
