Hi,
I retrieve the nodes of the two graphs using two queries. And then I use
nested loop to iterate through the two result list.
This results in out of memory error (which was displayed in the logs) and
looks like this:
java.lang.OutOfMemoryError: Java heap space
at
com.google.storage.onestore.v3.OnestoreEntity$Property.<init>(OnestoreEntity.java:2798)
at
com.google.storage.onestore.v3.OnestoreEntity$EntityProto.addProperty(OnestoreEntity.java:5649)
at
com.google.storage.onestore.v3.OnestoreEntity$EntityProto.merge(OnestoreEntity.java:6124)
at
com.google.apphosting.api.DatastorePb$QueryResult.merge(DatastorePb.java:12546)
at
com.google.appengine.repackaged.com.google.io.protocol.ProtocolMessage.mergeFrom(ProtocolMessage.java:402)
at
com.google.appengine.repackaged.com.google.io.protocol.ProtocolMessage.mergeFrom(ProtocolMessage.java:419)
at
com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall(DatastoreApiHelper.java:64)
at
com.google.appengine.api.datastore.QueryResultsSourceImpl.getMoreEntities(QueryResultsSourceImpl.java:85)
at
com.google.appengine.api.datastore.QueryResultsSourceImpl.getMoreEntities(QueryResultsSourceImpl.java:62)
at
com.google.appengine.api.datastore.QueryResultIteratorImpl.ensureLoaded(QueryResultIteratorImpl.java:145)
at
com.google.appengine.api.datastore.QueryResultIteratorImpl.hasNext(QueryResultIteratorImpl.java:71)
at
org.datanucleus.store.appengine.query.RuntimeExceptionWrappingIterator.hasNext(RuntimeExceptionWrappingIterator.java:44)
at
org.datanucleus.store.appengine.query.LazyResult$LazyAbstractListIterator.computeNext(LazyResult.java:210)
at
org.datanucleus.store.appengine.query.AbstractIterator.tryToComputeNext(AbstractIterator.java:132)
at
org.datanucleus.store.appengine.query.AbstractIterator.hasNext(AbstractIterator.java:127)
at
org.datanucleus.store.appengine.query.LazyResult$AbstractListIterator.hasNext(LazyResult.java:169)
at
servlets.computeIntersectionServlet.computeIntersectionEdges(computeIntersectionServlet.java:57)
at
servlets.computeIntersectionServlet.doPost(computeIntersectionServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at
com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
It would be great if any one knows a solution for this and help me.
Thanks,
Deepika
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