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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 33694] New: - Tomcat start fails
Date Tue, 22 Feb 2005 16:24:20 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=33694

           Summary: Tomcat start fails
           Product: Tomcat 5
           Version: 5.0.28
          Platform: Sun
        OS/Version: Solaris
            Status: NEW
          Severity: critical
          Priority: P1
         Component: Catalina
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: atanu.mukherjee@jpmchase.com
                CC: atanu.mukherjee@jpmchase.com


We have noticed that sometimes a Tomcat 5.0.28 instance would not start up 
properly upon restart. Unfortunately, this condition did not happen on all 
instances that we tested Tomcat 5.0.28. Also, it appears that it happens when 
samples are installed and you are starting for the first time. The symptom of 
a failed start would be a blank page in the browser when you try access any 
webapp (including the admin or manager webapps) and a message like this in 
catalina.out in <CATALINA_BASE>/logs directory.

- Error registering contexts
java.util.ConcurrentModificationException
         at java.util.HashMap$HashIterator.nextEntry(HashMap.java:782)
         at java.util.HashMap$EntryIterator.next(HashMap.java:824)
         at java.util.HashMap.putAllForCreate(HashMap.java:424)
         at java.util.HashMap.clone(HashMap.java:656)
         at mx4j.server.DefaultMBeanRepository.clone
(DefaultMBeanRepository.java: 
56)
         at mx4j.server.MBeanServerImpl.findMBeansByPattern
(MBeanServerImpl.java: 
1603)
         at mx4j.server.MBeanServerImpl.queryObjectNames
(MBeanServerImpl.java:1568)
...

Others who reported similar problems have resolved it by using a latest copy 
of jmxi.jar (http://java.sun.com/products/JavaManagement/download.html) from 
Sun and over-writing the jmx.jar file located in <CATALINA_HOME>/bin. We have 
not been able to verify if this is correct.

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