[jboss-jira] [JBoss JIRA] Created: (JASSIST-103) Errors appear when starting Weblogic 9.2 samples server with javaassist instrumentations when using jrockit JVM

[Tamir Lahav (JIRA)]

Errors appear when starting Weblogic 9.2 samples server with javaassist instrumentations when using jrockit JVM 
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                 Key: JASSIST-103
                 URL: https://jira.jboss.org/jira/browse/JASSIST-103
             Project: Javassist
          Issue Type: Bug
    Affects Versions: 3.11.0.GA
         Environment: Windows XP, Red Hat Linux
            Reporter: Tamir Lahav
            Assignee: Shigeru Chiba
             Fix For: 3.11.0.GA


I Instrumented Weblogic 9.2 samples server by adding this line to the startup script (<Weblogic-Home>\weblogic92\samples\domains\wl_server\bin\startWebLogic.cmd):

SET JAVA_TOOL_OPTIONS=-javaagent:C:\dev\workspaces\HEAD\SampleJavaAgent\lib\sample-java-agent.jar

sample-java-agent.jar contains 2 classes: 

SampleJavaAgent with this method:

  public static void premain(String agentArguments, Instrumentation instrumentation)
  {
    instrumentation.addTransformer(new SampleTransformer());
  }

SampleTransformer with this method:

   public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined,
      ProtectionDomain protectionDomain, byte[] classfileBuffer)
      throws IllegalClassFormatException
  {

    final String formattedClassName = className.replace('/', '.');    
    final ClassPool classPool = ClassPool.getDefault();
    final ClassPath classPath = new ByteArrayClassPath(formattedClassName, classfileBuffer);
    
    classPool.insertClassPath(classPath);

    try
    {

      CtClass ctClass = classPool.get(formattedClassName); 
      
      if (className.indexOf("wrapper/ResultSet") > 0 || 
          className.indexOf("sql/ResultSet") > 0 ||
          className.indexOf("net/netJDBCResultSet") > 0 ||
          className.indexOf("ResultSet") > 0)        
      {

        System.out.print("instrumenting " + className + "...");
        CtMethod cm = ctClass.getDeclaredMethod("next");
        cm.insertAfter("System.out.println(\"executing next for " + className + "\");");
        
        System.out.println("instrumented");
        
        return ctClass.toBytecode();
      }
    }

    catch (Throwable e)
    {
      System.out.println("failed. " + e.getMessage());
    }
    
    return null;
  }

When I"m starting Weblogic with the modified startup script I see this error:

<13:47:52 IST 01/03/2010> <Error> <Store> <BEA-280072> <JDBC store "exampleJDBCStore" failed to open table "examplesWLStore".
weblogic.store.io.jdbc.JDBCStoreException: [Store:280065][Store:280068]JDBC store failed to initialize. It did not find its database table and failed trying to create a new empty table using the commands in file "/weblogic/store/io/jdbc/ddl/pointbase.ddl". (server="examplesServer" store="exampleJDBCStore" table="examplesWLStore"):(Linked Cause, "java.sql.SQLException: The table "EXAMPLES.EXAMPLESWLSTORE" already exists.")
	at weblogic.store.io.jdbc.JDBCStoreIO.createTable(JDBCStoreIO.java:594)
	at weblogic.store.io.jdbc.JDBCStoreIO.open(JDBCStoreIO.java:342)
	at weblogic.store.internal.PersistentStoreImpl.open(PersistentStoreImpl.java:350)
	at weblogic.store.admin.AdminHandler.activate(AdminHandler.java:135)
	at weblogic.store.admin.JDBCAdminHandler.activate(JDBCAdminHandler.java:64)
	Truncated. see log file for complete stacktrace

When I changed the "if" statement in the transform method to this:

      if (className.indexOf("wrapper/ResultSet") > 0 || 
          className.indexOf("sql/ResultSet") > 0 ||
          className.indexOf("net/netJDBCResultSet") > 0 ||
          className.indexOf("ResultSetxxx") > 0)        

the error disappeared, even according to the system out messages the number of instrumented classes is the same in both cases.

When I used Sun's JVM by changing JAVA_VENDOR variable in setDomainEnv.cmd script in the same directory the error also disappeared.

Weblogic 9.2 installation can be found here:

http://www.oracle.com/technology/software/products/ias/htdocs/wls_main.html



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