Errors appear when starting Weblogic 9.2 samples server with javaassist instrumentations when using jrockit JVM ---------------------------------------------------------------------------------------------------------------- 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 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira