title: rmi java.security.AccessControlException
body: <p>I am new to RIM, and currently taking the tutorial at <a href="http://java.sun.com/docs/books/tutorial/rmi/overview.html" rel="nofollow noreferrer">http://java.sun.com/docs/books/tutorial/rmi/overview.html</a></p>
  
  <p>I am able to start server like:</p>
  
  <pre>
  C:\Documents and Settings\myHome>java -cp c:\home\ann\src;c:\home\ann\public_
  html\classes\compute.jar -Djava.rmi.server.codebase=file:/c:/home/ann/public_htm
  l/classes/compute.jar -Djava.rmi.server.hostname=localhost -Djava.security.polic
  y=c:\home\ann\policy\server.policy engine.ComputeEngine
  ComputeEngine bound
  </pre>
  
  <p>However, when i try to run client i got exceptions</p>
  
  <pre>
  access: access allowed (java.lang.RuntimePermission createClassLoader)
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  ComputePi exception:
  java.rmi.ServerException: RemoteException occurred in server thread; nested exce
  ption is:
          java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
  tion is:
          java.lang.ClassNotFoundException: access to class loader denied
          at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
          at sun.rmi.transport.Transport$1.run(Unknown Source)
          at java.security.AccessController.doPrivileged(Native Method)
          at sun.rmi.transport.Transport.serviceCall(Unknown Source)
          at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
          at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
  rce)
          at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
  ce)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
  )
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
          at java.lang.Thread.run(Unknown Source)
          at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
  n Source)
          at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
          at sun.rmi.server.UnicastRef.invoke(Unknown Source)
          at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unkn
  own Source)
          at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
          at $Proxy0.executeTask(Unknown Source)
          at client.ComputePi.main(ComputePi.java:27)
  Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested ex
  ception is:
          java.lang.ClassNotFoundException: access to class loader denied
          at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
          at sun.rmi.transport.Transport$1.run(Unknown Source)
          at java.security.AccessController.doPrivileged(Native Method)
          at sun.rmi.transport.Transport.serviceCall(Unknown Source)
          at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
          at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
  rce)
          at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
  ce)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
  )
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
          at java.lang.Thread.run(Unknown Source)
  Caused by: java.lang.ClassNotFoundException: access to class loader denied
          at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
          at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
          at java.rmi.server.RMIClassLoader$2.loadClass(Unknown Source)
          at java.rmi.server.RMIClassLoader.loadClass(Unknown Source)
          at sun.rmi.server.MarshalInputStream.resolveClass(Unknown Source)
          at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
          at java.io.ObjectInputStream.readClassDesc(Unknown Source)
          at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
          at java.io.ObjectInputStream.readObject0(Unknown Source)
          at java.io.ObjectInputStream.readObject(Unknown Source)
          at sun.rmi.server.UnicastRef.unmarshalValue(Unknown Source)
          ... 10 more
  Caused by: java.security.AccessControlException: access denied (java.io.FilePerm
  ission \c:\home\jones\public_html\classes\- read)
          at java.security.AccessControlContext.checkPermission(Unknown Source)
          at java.security.AccessController.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkPermission(Unknown Source)
          at sun.rmi.server.LoaderHandler$Loader.checkPermissions(Unknown Source)
          at sun.rmi.server.LoaderHandler$Loader.access$000(Unknown Source)
          ... 21 more
  </pre>
  
  <p>i believe the problem is the client policy file for client (correct if i am wrong please), as we can see from stack trace </p>
  
  <pre>
  Caused by: java.security.AccessControlException: access denied (java.io.FilePerm
  ission \c:\home\jones\public_html\classes\- read)
  </pre>
  
  <p>However, my client.policy file looks like</p>
  
  <pre>
  grant codeBase "file:/c:/home/jones/public_html/classes/-" {
      permission java.security.AllPermission;
   };
  grant{
      permission java.net.SocketPermission "127.0.0.1:1024-65535", "connect,resolve";
  };
  </pre>
  
  <p>There are AllPermission for codeBase "file:/c:/home/jones/public_html/classes/-".</p>
  
  <p>So, did i set the codeBase permission wrong, so there are more permission client application needs?</p>
  
  <p>Thanks!!!</p>
  
  <p><hr>
  Update:
  if i move the client.policy file to C:\Program Files\Java\jre6\lib\security and
  i start the client with</p>
  
  <pre>
  C:\Documents and Settings\jianzhang>java -cp c:\home\jones\src;c:\home\jones\pub
  lic_html\classes\compute.jar -Djava.rmi.server.codebase=file:/c:/home/jones/publ
  ic_html/classes/ -Djava.security.policy=client.policy -Djava.security.debug=acce
  ss,failure client.ComputePi localhost 45
  </pre>
  
  <p>i got exception </p>
  
  <pre>
  ComputePi exception:
  java.security.AccessControlException: access denied (java.net.SocketPermission 1
  27.0.0.1:1099 connect,resolve)
          at java.security.AccessControlContext.checkPermission(Unknown Source)
          at java.security.AccessController.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkConnect(Unknown Source)
          at java.net.Socket.connect(Unknown Source)
          at java.net.Socket.connect(Unknown Source)
          at java.net.Socket.(Unknown Source)
          at java.net.Socket.(Unknown Source)
          at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
  ource)
          at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S
  ource)
          at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
          at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
          at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
          at sun.rmi.server.UnicastRef.newCall(Unknown Source)
          at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
          at client.ComputePi.main(ComputePi.java:25)
  </pre>
  
  <p>However, the client.policy file has specified</p>
  
  <pre>
  grant{
      permission java.net.SocketPermission "127.0.0.1:1024-65535", "connect,resolve";
  };
  </pre>
  
  <p><hr>
  Update with full stack trace
  Here is the full stack trace, </p>
  
  <pre>
  C:\home\jones\src>java -cp C:\home\jones\src;C:\home\jones\public_html\classes\c
  ompute.jar;C:\home\jones\public_html\classes -Djava.rmi.server.codebase=file:/C:
  /home/jones/public_html/classes/ -Djava.security.policy=client.policy -Djava.sec
  urity.debug=access,failure client.ComputePi localhost 45
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.security.SecurityPermission getProperty.policy.expa
  ndProperties)
  access: access allowed (java.security.SecurityPermission getProperty.policy.igno
  reIdentityScope)
  access: access allowed (java.security.SecurityPermission getProperty.policy.allo
  wSystemProperty)
  access: access allowed (java.util.PropertyPermission sun.security.policy.utf8 re
  ad)
  access: access allowed (java.util.PropertyPermission sun.security.policy.numcach
  es read)
  access: access allowed (java.util.PropertyPermission java.security.policy read)
  access: access allowed (java.util.PropertyPermission user.dir read)
  access: access allowed (java.io.FilePermission C:\home\jones\src\client.policy r
  ead)
  access: access allowed (java.io.FilePermission client.policy read)
  access: access allowed (java.security.SecurityPermission getProperty.policy.url.
  1)
  access: access allowed (java.util.PropertyPermission java.home read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\se
  curity\java.policy read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\se
  curity\java.policy read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\se
  curity\java.policy read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\se
  curity\java.policy read)
  access: access allowed (java.util.PropertyPermission java.ext.dirs read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\ex
  t\* read)
  access: access allowed (java.io.FilePermission C:\WINDOWS\Sun\Java\lib\ext\* rea
  d)
  access: access allowed (java.security.SecurityPermission getProperty.policy.url.
  2)
  access: access allowed (java.util.PropertyPermission user.home read)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\.java.policy read)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\.java.policy read)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\.java.policy read)
  access: access allowed (java.security.SecurityPermission getProperty.policy.url.
  3)
  access: access allowed (java.util.PropertyPermission java.security.auth.policy r
  ead)
  access: access allowed (java.security.SecurityPermission getProperty.auth.policy
  .url.1)
  access: access allowed (java.lang.RuntimePermission accessClassInPackage.sun.sec
  urity.provider)
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.util.PropertyPermission java.security.egd read)
  access: access allowed (java.security.SecurityPermission getProperty.securerando
  m.source)
  access: access allowed (java.security.SecurityPermission putProviderProperty.SUN
  )
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.util.PropertyPermission * read,write)
  access: access allowed (java.util.PropertyPermission os.arch read)
  access: access allowed (java.util.PropertyPermission java.net.preferIPv6Addresse
  s read)
  access: access allowed (java.lang.RuntimePermission loadLibrary.net)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\bin\ne
  t.dll read)
  access: access allowed (java.util.PropertyPermission java.net.preferIPv4Stack re
  ad)
  access: access allowed (java.util.PropertyPermission impl.prefix read)
  access: access allowed (java.lang.reflect.ReflectPermission suppressAccessChecks
  )
  access: access allowed (java.util.PropertyPermission sun.net.spi.nameservice.pro
  vider.1 read)
  access: access allowed (java.net.SocketPermission myComputer resolve)
  access: access allowed (java.security.SecurityPermission getProperty.networkaddr
  ess.cache.ttl)
  access: access allowed (java.util.PropertyPermission sun.net.inetaddr.ttl read)
  access: access allowed (java.security.SecurityPermission getProperty.networkaddr
  ess.cache.negative.ttl)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\Local Settings\Temp read)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\Local Settings\Temp read)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\Local Settings\Temp read)
  access: access allowed (java.io.FilePermission C:\Documents and Settings\anga
  ng\Local Settings\Temp read)
  access: access allowed (java.io.FilePermission C:\DOCUME~1\ang~1\LOCALS~1\Tem
  p read)
  access: access allowed (java.util.PropertyPermission java.rmi.server.hostname re
  ad)
  access: access allowed (java.io.FilePermission C:\home\jones\src read)
  access: access denied (java.net.SocketPermission myComputer resolve)
  java.lang.Exception: Stack trace
          at java.lang.Thread.dumpStack(Unknown Source)
          at java.security.AccessControlContext.checkPermission(Unknown Source)
          at java.security.AccessController.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkConnect(Unknown Source)
          at java.net.InetAddress.getLocalHost(Unknown Source)
          at sun.rmi.transport.tcp.TCPEndpoint.(Unknown Source)
          at java.rmi.registry.LocateRegistry.getRegistry(Unknown Source)
          at java.rmi.registry.LocateRegistry.getRegistry(Unknown Source)
          at java.rmi.registry.LocateRegistry.getRegistry(Unknown Source)
          at client.ComputePi.main(ComputePi.java:24)
  access: access allowed (java.security.SecurityPermission getPolicy)
  access: access allowed (java.io.FilePermission C:\home\jones\src read)
  access: domain that failed ProtectionDomain  (file:/C:/home/jones/src/ )
   sun.misc.Launcher$AppClassLoader@1b90b39
   
   java.security.Permissions@d70d7a (
   (java.lang.RuntimePermission stopThread)
   (java.lang.RuntimePermission exitVM)
   (java.io.FilePermission \C:\home\jones\src\- read)
   (java.util.PropertyPermission line.separator read)
   (java.util.PropertyPermission java.vm.version read)
   (java.util.PropertyPermission java.vm.specification.version read)
   (java.util.PropertyPermission java.vm.specification.vendor read)
   (java.util.PropertyPermission java.vendor.url read)
   (java.util.PropertyPermission java.vm.name read)
   (java.util.PropertyPermission os.name read)
   (java.util.PropertyPermission java.vm.vendor read)
   (java.util.PropertyPermission path.separator read)
   (java.util.PropertyPermission java.specification.name read)
   (java.util.PropertyPermission os.version read)
   (java.util.PropertyPermission os.arch read)
   (java.util.PropertyPermission java.class.version read)
   (java.util.PropertyPermission java.version read)
   (java.util.PropertyPermission file.separator read)
   (java.util.PropertyPermission java.vendor read)
   (java.util.PropertyPermission java.vm.specification.name read)
   (java.util.PropertyPermission java.specification.version read)
   (java.util.PropertyPermission java.specification.vendor read)
   (java.net.SocketPermission localhost:1024- listen,resolve)
  )
  
  
  access: access allowed (java.util.PropertyPermission java.rmi.server.useLocalHos
  tName read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.logLevel
  read)
  access: access allowed (java.util.PropertyPermission sun.rmi.log.useOld read)
  access: access allowed (java.util.PropertyPermission java.util.logging.manager r
  ead)
  access: access allowed (java.lang.RuntimePermission setContextClassLoader)
  access: access allowed (java.lang.RuntimePermission shutdownHooks)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission java.util.logging.config.cl
  ass read)
  access: access allowed (java.util.PropertyPermission java.util.logging.config.fi
  le read)
  access: access allowed (java.util.PropertyPermission java.home read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\lo
  gging.properties read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\lo
  gging.properties read)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\lib\lo
  gging.properties read)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission line.separator read)
  access: access allowed (java.util.PropertyPermission line.separator read)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.tcp.logLe
  vel read)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.tcp.maxCo
  nnectionThreads read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.tcp.threa
  dKeepAliveTime read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.proxy.log
  Level read)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.proxy.con
  nectTimeout read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.proxy.eag
  erHttpFallback read)
  access: access allowed (java.util.PropertyPermission http.proxyHost read)
  access: access allowed (java.util.PropertyPermission proxyHost read)
  access: access allowed (java.util.PropertyPermission java.rmi.server.disableHttp
   read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.tcp.readT
  imeout read)
  access: access allowed (java.util.PropertyPermission sun.rmi.server.logLevel rea
  d)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission java.rmi.server.ignoreStubC
  lasses read)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission sun.rmi.client.logCalls rea
  d)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission java.rmi.server.hostname re
  ad)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.connectio
  nTimeout read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.tcp.hands
  hakeTimeout read)
  access: access allowed (java.util.PropertyPermission sun.rmi.transport.tcp.respo
  nseTimeout read)
  access: access allowed (java.util.logging.LoggingPermission control)
  access: access allowed (java.util.PropertyPermission sun.rmi.runtime.schedulerTh
  reads read)
  access: access allowed (java.lang.RuntimePermission sun.rmi.runtime.RuntimeUtil.
  getInstance)
  access: access allowed (java.net.SocketPermission localhost resolve)
  access: access allowed (java.lang.RuntimePermission loadLibrary.net)
  access: access allowed (java.io.FilePermission C:\Program Files\Java\jre6\bin\ne
  t.dll read)
  access: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve)
  
  java.lang.Exception: Stack trace
          at java.lang.Thread.dumpStack(Unknown Source)
          at java.security.AccessControlContext.checkPermission(Unknown Source)
          at java.security.AccessController.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkConnect(Unknown Source)
          at java.net.Socket.connect(Unknown Source)
          at java.net.Socket.connect(Unknown Source)
          at java.net.Socket.(Unknown Source)
          at java.net.Socket.(Unknown Source)
          at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
  ource)
          at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S
  ource)
          at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
          at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
          at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
          at sun.rmi.server.UnicastRef.newCall(Unknown Source)
          at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
          at client.ComputePi.main(ComputePi.java:25)
  access: access allowed (java.security.SecurityPermission getPolicy)
  access: access allowed (java.io.FilePermission C:\home\jones\src read)
  access: domain that failed ProtectionDomain  (file:/C:/home/jones/src/ )
   sun.misc.Launcher$AppClassLoader@1b90b39
   
   java.security.Permissions@77158a (
   (java.lang.RuntimePermission stopThread)
   (java.lang.RuntimePermission exitVM)
   (java.io.FilePermission \C:\home\jones\src\- read)
   (java.util.PropertyPermission line.separator read)
   (java.util.PropertyPermission java.vm.version read)
   (java.util.PropertyPermission java.vm.specification.version read)
   (java.util.PropertyPermission java.vm.specification.vendor read)
   (java.util.PropertyPermission java.vendor.url read)
   (java.util.PropertyPermission java.vm.name read)
   (java.util.PropertyPermission os.name read)
   (java.util.PropertyPermission java.vm.vendor read)
   (java.util.PropertyPermission path.separator read)
   (java.util.PropertyPermission java.specification.name read)
   (java.util.PropertyPermission os.version read)
   (java.util.PropertyPermission os.arch read)
   (java.util.PropertyPermission java.class.version read)
   (java.util.PropertyPermission java.version read)
   (java.util.PropertyPermission file.separator read)
   (java.util.PropertyPermission java.vendor read)
   (java.util.PropertyPermission java.vm.specification.name read)
   (java.util.PropertyPermission java.specification.version read)
   (java.util.PropertyPermission java.specification.vendor read)
   (java.net.SocketPermission localhost:1024- listen,resolve)
  )
  
  
  ComputePi exception:
  java.security.AccessControlException: access denied (java.net.SocketPermission 1
  27.0.0.1:1099 connect,resolve)
          at java.security.AccessControlContext.checkPermission(Unknown Source)
          at java.security.AccessController.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkConnect(Unknown Source)
          at java.net.Socket.connect(Unknown Source)
          at java.net.Socket.connect(Unknown Source)
          at java.net.Socket.(Unknown Source)
          at java.net.Socket.(Unknown Source)
          at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
  ource)
          at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S
  ource)
          at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
          at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
          at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
          at sun.rmi.server.UnicastRef.newCall(Unknown Source)
          at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
          at client.ComputePi.main(ComputePi.java:25)
  
  </pre>
  
  <p>At line 80:</p>
  
  <pre>
  access: access allowed (java.net.SocketPermission myComputer resolve)
  </pre>
  
  <p>however afrom line 99 to 111</p>
  
  <pre>
  access: access denied (java.net.SocketPermission myComputer resolve)
  java.lang.Exception: Stack trace
          at java.lang.Thread.dumpStack(Unknown Source)
          at java.security.AccessControlContext.checkPermission(Unknown Source)
          at java.security.AccessController.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkPermission(Unknown Source)
          at java.lang.SecurityManager.checkConnect(Unknown Source)
          at java.net.InetAddress.getLocalHost(Unknown Source)
          at sun.rmi.transport.tcp.TCPEndpoint.(Unknown Source)
          at java.rmi.registry.LocateRegistry.getRegistry(Unknown Source)
          at java.rmi.registry.LocateRegistry.getRegistry(Unknown Source)
          at java.rmi.registry.LocateRegistry.getRegistry(Unknown Source)
          at client.ComputePi.main(ComputePi.java:24)
  </pre>
  
  <hr>
  
  <p>Problem solved, see
  <a href="http://forums.sun.com/thread.jspa?messageID=10939150&#35;#10939150" rel="nofollow noreferrer">my another post</a></p>