Compile project using apache mina fails

Hi,

I am trying to compile a project using the apache mina library to  
native code using gcj. I succeeded building the native library but the  
program fails with an exception while trying to access  
VMThreadMXBeanImpl. getThreadInfoForId():

java.lang.UnsupportedOperationException:  
gnu::java::lang::management::VMThreadMXBeanImpl::getThreadInfoForId  
(jlong, jint) not implemented
    at gnu.java.lang.management.ThreadMXBeanImpl.getThreadInfo(libgcj. 
9.dylib)
    at java.lang.reflect.Method.invoke(libgcj.9.dylib)
    at java.lang.Thread.getStackTrace(libgcj.9.dylib)
    at  
org.apache.mina.core.future.DefaultIoFuture.checkDeadLock(ppp_mina)
    at org.apache.mina.core.future.DefaultIoFuture.await0(ppp_mina)
    at  
org 
.apache.mina.core.future.DefaultIoFuture.awaitUninterruptibly(ppp_mina)
    at  
org 
.apache 
.mina.core.future.DefaultConnectFuture.awaitUninterruptibly(ppp_mina)
    at ppp.networklayer.pppClient.connect(ppp_mina)
    at ppp.networklayer.pppClient.init(ppp_mina)
    at ppp.networklayer.pppClient.<init>(ppp_mina)
    at ppp.networklayer.pppClientFactory.getClient(ppp_mina)
    at ppp.networklayer.pppClientFactory.getClient(ppp_mina)
    at ppp.networklayer.pppClient.connectToServer(ppp_mina)
    at  
ppp.remoteadministration.AdministrationServer.messageReceived(ppp_mina)
    at org.apache.mina.core.filterchain.DefaultIoFilterChain 
$TailFilter.messageReceived(ppp_mina)
    at  
org 
.apache 
.mina 
.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(ppp_mina)
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access 
$1200(ppp_mina)
    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl 
$1.messageReceived(ppp_mina)
    at org.apache.mina.filter.codec.ProtocolCodecFilter 
$ProtocolDecoderOutputImpl.flush(ppp_mina)
    at  
org 
.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ppp_mina)
    at  
org 
.apache 
.mina 
.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(ppp_mina)
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access 
$1200(ppp_mina)
    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl 
$1.messageReceived(ppp_mina)
    at  
org 
.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(ppp_mina)
    at  
org 
.apache 
.mina 
.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(ppp_mina)
    at  
org 
.apache 
.mina 
.core.filterchain.DefaultIoFilterChain.fireMessageReceived(ppp_mina)
    at  
org.apache.mina.core.polling.AbstractPollingIoProcessor.read(ppp_mina)
    at  
org 
.apache.mina.core.polling.AbstractPollingIoProcessor.process(ppp_mina)
    at  
org 
.apache.mina.core.polling.AbstractPollingIoProcessor.process(ppp_mina)
    at org.apache.mina.core.polling.AbstractPollingIoProcessor.access 
$400(ppp_mina)
    at org.apache.mina.core.polling.AbstractPollingIoProcessor 
$Processor.run(ppp_mina)
    at org.apache.mina.util.NamePreservingRunnable.run(ppp_mina)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(libgcj. 
9.dylib)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(libgcj. 
9.dylib)
    at java.lang.Thread.run(libgcj.9.dylib)


Is there any workaround for the missing function (alternative  
implementation)?

I am using gcj  version 4.3.3 on Mac OS X.

Thank you very much for any help!

Patrick