[Building Sakai] How to setup logging to send ERRORs by mail
Matthew Jones
jonespm at umich.edu
Thu Sep 30 06:22:20 PDT 2010
Hi Matvey,
I know I'd set something like this up before, but you might want to look at
something simpler and external such as a log file monitor rather than
incorporating it into these files. It would make it easier to change the
rules on the fly (like if you get messages you want to filter out because
you're getting spammed) and if there was a problem sending mail there might
be an issue with the appender. This page talks about some of the advantages
of separating logging request from taking action. [1]
What we do at Michigan is us the syslog appender
(org.apache.log4j.net.SyslogAppender) to consolidate all app servers logs on
one remote "syslog" server. Then we monitor this combined log with swatch,
[2] taking action (send email, etc) when any patterns match. Some errors are
(unfortunately) common/expected so we don't need to know about them, others
we are interested in. I believe that SMTPAppender also had some other
limitations at the time (what types of messages it could send), so this
worked out really good. Individual developers could set up their own swatch
if they were monitoring for something specific.
Splunk [3] also *looks* fancy if you wanted something to do some
visualization, though I've just came across it recently and haven't used it.
[1]
http://www.johnandcailin.com/blog/john/how-setup-real-time-email-notification-critical-syslog-events
[2] http://sourceforge.net/projects/swatch/
<http://sourceforge.net/projects/swatch/>[3] http://www.splunk.com/
<http://www.splunk.com/>
On Thu, Sep 30, 2010 at 6:03 AM, Nuno Fernandes <nuno at ufp.edu.pt> wrote:
> Hi Matvey,
>
> This is something I also would like to have. However, I am not sure if this
> is possible:
>
> The Log4J jar is located at TOMCAT/common/lib, which is the same location
> is expects to find mail-*.jar library (I think this is what casues the "
> NoClassDefFoundError" error on the logs)
>
> In fact, this mail-*.jar exists, but in TOMCAT/shared/lib/ which apparently
> is not available to Log4J. Having this mail library duplicated on both
> locations is wrong, and I'm not sure if moving the mail-*.jar to common/lib
> will be OK too: Log4J should be able to find, but I don't know if this won't
> bring issues with Sakai code using the mail-*.jar (like the email service).
>
> Maybe you can try and report back your experiences to the community?
>
> Thanks,
> Nuno
>
> On Thu, Sep 30, 2010 at 10:13 AM, Matvey Maslov <matvey at sciworth.com>wrote:
>
>> I'm trying to setup Log4j to send ERRORs by mail. To do this I changed
>> log4j.properties in kernel-1.0.14 project
>> (kernel-common/src/main/config/log4j.properties) to look like this:
>> # use "A" for log in with catalina.out (actually standard output)
>> log4j.rootLogger=WARN, Sakai, mail
>> ...
>> # Mail config
>> log4j.appender.mail=org.apache.log4j.net.SMTPAppender
>> log4j.appender.mail.To=<to address>
>> log4j.appender.mail.From=<from address>
>> log4j.appender.mail.SMTPHost=<smtp host>
>> log4j.appender.mail.SMTPUsername=<smtp username>
>> log4j.appender.mail.SMTPPassword=<smtp password>
>> log4j.appender.mail.Threshold=ERROR
>> log4j.appender.mail.BufferSize=1
>> log4j.appender.mail.Subject=Sakai Error
>> log4j.appender.mail.layout=org.apache.log4j.HTMLLayout
>> ...
>> (with valid data instead of <...> placeholders, of course).
>>
>> When I build and deploy the new version of kernel to Sakai 2.6.2, I get
>> the following error in the logs:
>>
>> WARNING: Error creating bean with name
>> 'org.sakaiproject.log.api.LogConfigurationManager' defined in file
>> [/Users/matvey/Projects/sakai-tomcat/compone
>> nts/sakai-kernel-component/WEB-INF/util-components.xml]: Invocation of
>> init method failed; nested exception is java.lang.NoClassDefFoundError:
>> Could n
>> ot initialize class org.apache.log4j.LogManager
>> org.springframework.beans.factory.BeanCreationException: Error creating
>> bean with name 'org.sakaiproject.log.api.LogConfigurationManager' defined in
>> f
>> ile
>> [/Users/matvey/Projects/sakai-tomcat/components/sakai-kernel-component/WEB-INF/util-components.xml]:
>> Invocation of init method failed; nested exce
>> ption is java.lang.NoClassDefFoundError: Could not initialize class
>> org.apache.log4j.LogManager
>> Caused by: java.lang.NoClassDefFoundError: Could not initialize class
>> org.apache.log4j.LogManager
>> at org.apache.log4j.Logger.getRootLogger(Logger.java:135)
>> at
>> org.sakaiproject.log.impl.Log4jConfigurationManager.init(Log4jConfigurationManager.java:106)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java
>> :1240)
>> at
>> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1205
>> )
>> at
>> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1171)
>> at
>> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:425)
>> at
>> org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:251)
>> at
>> org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:156)
>> at
>> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:248)
>> at
>> org.sakaiproject.util.NoisierDefaultListableBeanFactory.getBean(NoisierDefaultListableBeanFactory.java:115)
>> at
>> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:160)
>> at
>> org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:733)
>> at
>> org.sakaiproject.util.SakaiApplicationContext.onRefresh(SakaiApplicationContext.java:90)
>> at
>> org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:346)
>> at
>> org.sakaiproject.component.impl.SpringCompMgr.init(SpringCompMgr.java:146)
>> at
>> org.sakaiproject.component.cover.ComponentManager.getInstance(ComponentManager.java:68)
>> at
>> org.sakaiproject.component.cover.ComponentManager.get(ComponentManager.java:80)
>> at org.sakaiproject.dav.DavServlet.init(DavServlet.java:500)
>> at javax.servlet.GenericServlet.init(GenericServlet.java:212)
>> at
>> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
>> at
>> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
>> at
>> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
>> at
>> org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
>> at
>> org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
>> at
>> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
>> at
>> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
>> at
>> org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
>> at
>> org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
>> at
>> org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
>> at
>> org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
>> at
>> org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
>> at
>> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
>> at
>> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
>> at
>> org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
>> at
>> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
>> at
>> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
>> at
>> org.apache.catalina.core.StandardService.start(StandardService.java:448)
>> at
>> org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
>> at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
>> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
>>
>> Please help to set the logging properly. Thanks a lot! :)
>>
>>
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>
>
>
> --
> Nuno Fernandes . { Analyst/Programmer }
>
> || web . { http://www.ufp.pt | http://tinyurl.com/nfgrilo | follow_me
> @ nfgrilo }
> || work . { Universidade Fernando Pessoa | Praça 9 de Abril, 349 |
> 4249-004 Porto }
>
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