Hi Andre
Tomcat DOES in fact rewrite the tomcat-users.xml file during startup.
This has been mentioned on this list several times as being insecure but
the general opinion is that you should not be using the
MemoryUserDatabaseRealm in production.
Actually, I found that not only does it rewrite it, but it also uses the
current umask so that it is quite likely that the file will become
world-readable. You should probably do what the gurus suggest and switch
to a more robust realm (eg JDBC etc)
Here are some suggestions you have probably already tried:
What are the permissions on the /svr/www/tomcat/base/conf folder?
Are you sure that the user that tomcat runs as can write to that folder?
Have you checked that tomcat is running as the user that you expect?
Is it possible that there is a filing system error or even a disk error?
Regards
Alan Chaney
André Warnier wrote:
Hi.
Does someone have an idea of what is going as per the logfile
catalina.out below ?
What is this IOException all about ?
This is a Tomcat 5.0.x under Suse Enterprise Linux 10.1, which had been
working fine until now and suddenly logs this at startup.
This Tomcat runs under an IBM JVM 1.5.
Tomcat is started, as per the listening ports and the "ps" display I can
see, but apparently the access to Tomcat (through Apache and mod_jk)
does not work anymore (tells me : The server is temporarily unable to
service your request due to maintenance downtime or capacity problems.
Please try again later. )
Additional info :
- the directory /srv/www/tomcat5/base/conf/ is writeable by the user
"tomcat" under which Tomcat is started.
- To my knowledge, the server.xml has not been changed since the
previous succesful restart 2 days ago, and neither has tomcat-users.xml
server.xml (excerpts) :
...
<!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users -->
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved">
</Resource>
<ResourceParams name="UserDatabase">
<parameter>
<name>factory</name>
<value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
</parameter>
<parameter>
<name>pathname</name>
<value>conf/tomcat-users.xml</value>
</parameter>
</ResourceParams>
...
(further under <Engine> and <Host> :)
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
debug="0" resourceName="UserDatabase"/>
...
catalina.out :
2008-12-28 13:21:58,543 [main] INFO
org.apache.catalina.core.StandardService - Starting service Catalina
2008-12-28 13:21:58,545 [main] INFO
org.apache.catalina.core.StandardEngine - Starting Servlet Engine:
Apache Tomcat/5.0
2008-12-28 13:21:58,548 [main] WARN org.apache.naming.NamingContext -
Unexpected exception resolving reference
java.io.IOException: IOException writing to
/srv/www/tomcat5/base/conf/tomcat-users.xml.new
at
org.apache.catalina.users.MemoryUserDatabase.save(MemoryUserDatabase.java:495)
at
org.apache.catalina.users.MemoryUserDatabaseFactory.getObjectInstance(MemoryUserDatabaseFactory.java:98)
at
org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:129)
at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:316)
at org.apache.naming.NamingContext.lookup(NamingContext.java:791)
at org.apache.naming.NamingContext.lookup(NamingContext.java:151)
at
org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:252)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1075)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at
org.apache.catalina.core.StandardService.start(StandardService.java:480)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
javax.naming.NamingException: IOException writing to
/srv/www/tomcat5/base/conf/tomcat-users.xml.new
at org.apache.naming.NamingContext.lookup(NamingContext.java:803)
at org.apache.naming.NamingContext.lookup(NamingContext.java:151)
at
org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:252)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1075)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at
org.apache.catalina.core.StandardService.start(StandardService.java:480)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2008-12-28 13:21:58,549 [main] ERROR
org.apache.catalina.startup.Catalina - Catalina.start:
LifecycleException: No UserDatabase component found under key UserDatabase
at
org.apache.catalina.realm.UserDatabaseRealm.start(UserDatabaseRealm.java:259)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1075)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at
org.apache.catalina.core.StandardService.start(StandardService.java:480)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2008-12-28 13:21:58,550 [main] INFO org.apache.catalina.startup.Catalina
- Server startup in 105 ms
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