Unable to run ElasticSearch as a service on Ubuntu

I'm trying to get ElasticSearch up and running following the normal setup guide. Everything is running fine on my Macbook but I'm trying to do the same on an Ubuntu 11.04 server. Running `/usr/local/elasticsearch/bin/elasticsearch -f` works and I get a response from `curl http://localhost:9200`. However this is what I get when I try to start ElasticSearch as a service (I've installed the service wrapper): ``` $ rcelasticsearch start Starting ElasticSearch... Waiting for ElasticSearch............................. WARNING: ElasticSearch may have failed to start. ``` Sure enough `rcelasticsearch status` says `ElasticSearch is not running` and localhost:9200 cannot be reached. Any ideas what might be the problem? Edit: The service log says: ``` Launching a JVM... JVM exited while loading the application. Error occurred during initialization of VM Could not reserve enough space for object heap ```