tomcat-users.xml file corruption

["Nachum, Sagi" <Sa...@verint.com>]

I have been running tomcat
<http://www.tek-tips.com/viewthread.cfm?qid=1169838&page=1##>  on
windows 2003
<http://www.tek-tips.com/viewthread.cfm?qid=1169838&page=1##>  with no
problems until the computer
<http://www.tek-tips.com/viewthread.cfm?qid=1169838&page=1##>  was
unexpectdly shut down (power cut).

When I restarted the computer and tried to run tomcat again it wouldn't
work.

I saw the following exception in the catalina_log:

2005-12-27 14:02:10 UserDatabaseRealm[Standalone]: Exception looking up
UserDatabase under key UserDatabase

javax.naming.NamingException: Content is not allowed in prolog.

            at
org.apache.naming.NamingContext.lookup(NamingContext.java:797)

            at
org.apache.naming.NamingContext.lookup(NamingContext.java:147)

            at
org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java
:250)

            at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1126)

            at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:316)

            at
org.apache.catalina.core.StandardService.start(StandardService.java:450)

            at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2143)

            at
org.apache.catalina.startup.CatalinaService.start(CatalinaService.java:2
22)

            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)

            at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)

            at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)

            at java.lang.reflect.Method.invoke(Method.java:585)

            at
org.apache.catalina.startup.BootstrapService.start(BootstrapService.java
:198)

            at
org.apache.catalina.startup.BootstrapService.main(BootstrapService.java:
260)

After inquiring a little I discovered that the tomcat-users.xml file
located at conf directory is empty.
After I replaced this file with a valid one, the problem was solved. I
saw some more messages in this and other forums that regard this
problem.
And here's my question:

I don't want to need to replace this file every time the computer
crashes unexpectedly, how can I prevent this file from being corrupted?


10x,
Sagi





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Re: tomcat-users.xml file corruption

[Markus Schönhaber <ma...@schoenhaber.de>]

Nachum, Sagi wrote:
> After inquiring a little I discovered that the tomcat-users.xml file
> located at conf directory is empty.
> After I replaced this file with a valid one, the problem was solved. I
> saw some more messages in this and other forums that regard this
> problem.
> And here's my question:
>
> I don't want to need to replace this file every time the computer
> crashes unexpectedly, how can I prevent this file from being corrupted?

You can prevent a recent Tomcat 5.5 from writing tomcat-users.xml by setting
readonly="true"
on the Resource element in server.xml where the UserDatabase is defined.

But if you can't prevent your machine from unexpectedly shutting down, wether 
or not tomcat-users.xml get destroyed might be your smallest problem.

Regards
  mks

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