im getting this error, how can i find out what is this error for
<p>help with this error please.</p>

<pre><code>java.rmi.ServerError: Error occurred in server thread; nested exception is: 
java.lang.OutOfMemoryError: Java heap space
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.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at com.genalytics.datapipe.rmi.SamplerServer_Stub.generateSampledMetaData(Unknown Source)
at com.genalytics.datapipe.rmi.SamplerClient.generateSampledMetaData(SamplerClient.java:143)
at com.genalytics.gui.modeling.GuiInfoPanel_Datapipe_SampleTab$GuiThread_GenerateSample.construct(GuiInfoPanel_Datapipe_SampleTab.java:757)
at com.genalytics.gui.common.GuiThread$2.run(GuiThread.java:97)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.OutOfMemoryError: Java heap space
</code></pre>
