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POException while dispatching incoming RPC call - GWT
 

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    <p>I am facing an error while running my GWT application.</p> <pre class="lang-java prettyprint-override"><code>public abstract class BaseDAOImpl&lt;T&gt; implements BaseDAO&lt;T&gt; { private Class&lt;T&gt; persistentClass; @Override public List&lt;T&gt; findAll() { PersistenceManager pm = PMF.get().getPersistenceManager(); List&lt;T&gt; results = null; Query query = null; try{ query = pm.newQuery(persistentClass); [Error Line] results = (List&lt;T&gt;) query.execute(); results = (List&lt;T&gt;) pm.detachCopyAll(results); }finally{ pm.close(); } return results; } } </code></pre> <p>Showing me Error as following:</p> <blockquote> <p>[ERROR] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.util.List com.aamjanta.webapp.client.service.StoreService.getStoreList()' threw an unexpected exception: java.lang.OutOfMemoryError: PermGen space at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)</p> </blockquote> <hr> <blockquote> <p>[ERROR] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.util.List com.aamjanta.webapp.client.service.StoreService.getStoreList()' threw an unexpected exception: java.lang.NoClassDefFoundError: Could not initialize class org.datanucleus.store.appengine.jdo.DatastoreJDOMetaDataManager at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</p> </blockquote> <hr> <blockquote> <p>[ERROR] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.util.List com.aamjanta.webapp.client.service.CouponService.getCouponList()' threw an unexpected exception: java.lang.NoClassDefFoundError: Could not initialize class org.datanucleus.store.appengine.jdo.DatastoreJDOMetaDataManager at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</p> </blockquote>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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