Can anyone help me get Roller 3.1 running on Websphere 6.0?I downloaded the
binary release zip and the extra required jars from java.net, and unzipped
them. I created the database, ran the script to create the tables and
configured the datasource to be mapped to the jdbc/rollerdb resource ref. I
created an appropriate custom-roller.properties file in /WEB-INF/classes
(specifying log file paths) and re-packaged the web app as a .war file, which
I've deployed into Websphere 6.0. However, when I start the server/app I get a
bunch of exceptions in the log:[12/07/07 14:52:26:545 BST] 0000000a
HibernateRoll E org.apache.roller.business.hibernate.HibernateRollerImpl <init>
Error initializing Hibernate
java.lang.VerifyError: (class:
org/apache/roller/business/hibernate/HibernatePersistenceStrategy, method:
<init> signature: (Ljava/lang/String;Ljava/lang/String;)V) Incompatible
argument to method at
org.apache.roller.business.hibernate.HibernateRollerImpl.<init>(HibernateRollerImpl.java:83)
at
org.apache.roller.business.hibernate.HibernateRollerImpl.instantiate(HibernateRollerImpl.java:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
at java.lang.reflect.Method.invoke(Method.java:391) at
org.apache.roller.business.RollerFactory.getRoller(RollerFactory.java:66) at
org.apache.roller.ui.core.RollerContext.contextInitialized(RollerContext.java:170)
at
com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1434)...[12/07/07
14:52:26:560 BST] 0000000a RollerFactory E
org.apache.roller.business.RollerFactory getRoller Error instantiating
org.apache.roller.business.hibernate.HibernateRollerImpl
java.lang.reflect.InvocationTargetException at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
at java.lang.reflect.Method.invoke(Method.java:391) at
org.apache.roller.business.RollerFactory.getRoller(RollerFactory.java:66) at
org.apache.roller.ui.core.RollerContext.contextInitialized(RollerContext.java:170)
at
com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1434)...Caused
by: org.apache.roller.RollerException at
org.apache.roller.business.hibernate.HibernateRollerImpl.<init>(HibernateRollerImpl.java:90)
at
org.apache.roller.business.hibernate.HibernateRollerImpl.instantiate(HibernateRollerImpl.java:101)
... 41 more[12/07/07 14:52:26:623 BST] 0000000a RollerFactory E
org.apache.roller.business.RollerFactory getRoller Failed to instantiate
fallback roller impl java.lang.Exception: Doh!
Couldn't instantiate a roller class at
org.apache.roller.business.RollerFactory.getRoller(RollerFactory.java:89) at
org.apache.roller.ui.core.RollerContext.contextInitialized(RollerContext.java:170)
at
com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1434)So
I tried stepping through line by line in RAD7's debugger - sure enough, in the
HibernateRollerImpl constructor it catches the Throwablejava.lang.VerifyError:
arguments are not type compatible (class:
org/apache/roller/business/hibernate/HibernatePersistenceStrategy method:
<init>(Ljava/lang/String;Ljava/lang/String;)V) at pc: 223However, watch
expressions for the RollerConfig.getProperty values certainly look to be
returning strings to me (and at least it confirmed the roller-custom properties
file was being used). So two Strings aren't type compatible with two
Strings... Huh? No wonder the comment in the source says "// if this happens
then we are screwed" :-(Next I tried changing the classloader behaviour to
"parent last" rather than the default "parent first", in case it's picking up
the wrong version of something from the JRE. But that just produced a
different set of errors:[11/07/07 19:23:34:448 BST] 000000b9 RollerContext E
org.apache.roller.ui.core.RollerContext contextInitialized RollerContext
initialization failed
java.lang.ClassCastException: com.ibm.ws.rsadapter.jdbc.WSJdbcDataSource at
org.apache.roller.ui.core.RollerContext.upgradeDatabaseIfNeeded(RollerContext.java:374)
at
org.apache.roller.ui.core.RollerContext.contextInitialized(RollerContext.java:168)
at
com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1434)
at
com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:411)...[11/07/07
19:23:34:526 BST] 000000b9 ServletWrappe E SRVE0100E: Did not realize init()
exception thrown by servlet action: java.lang.LinkageError: Class
org/xml/sax/SAXParseException violates loader constraints: definition mismatch
between parent and child loaders at
org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1079)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:324) at
javax.servlet.GenericServlet.init(GenericServlet.java:256) at
com.ibm.ws.webcontainer.servlet.ServletWrapper.init(ServletWrapper.java:310)I'm
guessing the LinkageError on SAXParseException is due to the org.xml.sax.*
class files being found both in WEB-INF/lib/xmlrpc-1.2-b1.jar and also in
Websphere's $JRE/lib/xml.jar ? Given they're standard JAXP interfaces and have
been included in the JDK since 1.4, should they really be in the xmlrpc jar
anyway? I also noticed the xalan jar bundled with Roller is version 2.7.0
(according to org.apache.xalan.Version), while the one included in Websphere's
xml.jar (which I believe is the one it would use for "Parent First"
classloading mode) is "XSLT4J Java 2.6.9". Assuming that's just their own
build of xalan 2.6.9, is there anything specific to 2.7.0 that Roller requires,
or should it be okay with the earlier version?I had hoped it wouldn't be too
hard to get this working, as they said in Covalent's recent Roller webcast that
"IBM use Roller for their developerWorks blogs, and they run it on Websphere".
However, although the HTTP response headers suggest they're also using
Websphere 6.0 ("Server: IBM_HTTP_Server/6.0.2.13 Apache/2.0.47 (Unix)"), I
notice the roller.js script
(http://www-03.ibm.com/developerworks/blogs/theme/scripts/roller.js) doesn't
include the isblank function near the end; looking through the different tags
in Subversion, that suggests they may only be running Roller 2.0.2 or earlier,
as that's the latest version of that file which didn't contain that function.
I'd prefer to use the current version than one that's nearly a year and a half
old. Does anybody have any suggestions how I can get 3.1 working? Has anyone
successfully got it installed into Websphere 6?Andrew.--
http://pseudoq.sourceforge.net/ Open source java Sudoku application
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