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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 51610] New: Context fails to reload after an error in web.xml was corrected
Date Thu, 04 Aug 2011 04:28:49 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=51610

             Bug #: 51610
           Summary: Context fails to reload after an error in web.xml was
                    corrected
           Product: Tomcat 7
           Version: 7.0.19
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
        AssignedTo: dev@tomcat.apache.org
        ReportedBy: knst.kolinko@gmail.com
    Classification: Unclassified


With current trunk. Steps to reproduce:

1. Start Tomcat 7

2. Go to webapps/examples/WEB-INF/web.xml and uncomment <filter-mapping> for
"Timing Filter" (line 75).

3. Wait several seconds. The examples webapp is reloaded, but fails to start. 

This happens because there is a typo. The <filter-name> value should be
s/Timing Filter/Timing filter/.

There is stack trace in the logs:

[[[
04.08.2011 8:09:39 org.apache.catalina.startup.HostConfig checkResources
WARNING: Error during context [/examples] restart
java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter
name Timing Filter
    at
org.apache.catalina.core.StandardContext.validateFilterMap(StandardContext.java:2950)
    at
org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:2915)
    at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1206)
    at
org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1343)
    at
org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:896)
    at
org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:322)
    at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    at
org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89)
    at
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5103)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at
org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1279)
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1360)
    at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:294)
    at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    at
org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89)
    at
org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1240)
    at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1398)
    at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1408)
    at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1387)
    at java.lang.Thread.run(Thread.java:662)
]]]

4. Go to web.xml and edit it once again. E.g. re-comment the mapping, or
correct the typo.

5. Wait several seconds. Here is an issue:

EXPECTED: The examples webapp should reload successfully.
ACTUAL: Reload fails. The following is printed in the logs:

04.08.2011 8:09:59 org.apache.catalina.startup.HostConfig checkResources
INFO: Reloading context [/examples]
04.08.2011 8:09:59 org.apache.catalina.util.LifecycleBase start
INFO: The start() method was called on component
[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/examples]]
after start() had already been called. The second call will be ignored.


6. Stop Tomcat. Here is the second issue:

EXPECTED: Successful shutdown
ACTUAL: 
[[[
04.08.2011 8:14:10 org.apache.catalina.startup.Catalina stop
SEVERE: Catalina.stop
org.apache.catalina.LifecycleException: An invalid Lifecycle transition was
attempted ([before_stop]) for component
[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/examples]]
in state [STARTING_PREP]
    at
org.apache.catalina.util.LifecycleBase.invalidTransition(LifecycleBase.java:387)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:212)
    at
org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:1072)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:225)
    at
org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:1072)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:225)
    at
org.apache.catalina.core.StandardService.stopInternal(StandardService.java:502)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:225)
    at
org.apache.catalina.core.StandardServer.stopInternal(StandardServer.java:748)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:225)
    at org.apache.catalina.startup.Catalina.stop(Catalina.java:694)
    at
org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:847)
]]]

This exception at shutdown happens only if examples webapp was correct when
Tomcat started, but was broken afterwards. If it was already broken at startup
time, nothing happens.

7. Here is the third issue: when the above happens the shutdown sequence is
apparently aborted abnormally.

EXPECTED: "INFO: Stopping ProtocolHandler ["http-bio-8080"]" etc. messages
ACTUAL: There are no messages after the "SEVERE: Catalina.stop" one that I
cited above.

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