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