"out of memory" error

Hello,

I have a Java web application using Hibernate to connect to a PostgreSQL
backend.  I am seeing the below stack trace during processing of a set
of data consisting of around 1000 objects; for a 200 object set I don't
see the exception.

I believe the salient point is the Out Of Memory bit - marked below by
*****'s
The fact that this exception occurs during a call to
org.postgresql.util.PSQLException.parseServerError() seems disturbing too.

* the JVM or servlet container might be out of memory, however the db is
on a different machine than the server so this doesn't seem likely

* Postgres might be out of memory.  How would I check for this?
Subsequent requests go through just fine, as do any requests I make
directly using psql.

* something Else is happening

Any advice on how to attack this issue would be much appreciated!

Rachel McConnell


WARN  [     SystemErrorInterceptor ] - java.util.NoSuchElementException
java.util.NoSuchElementException
         at java.util.AbstractList$Itr.next(AbstractList.java:426)
         at java.util.Collections$6.nextElement(Collections.java:2479)
         at
com.enginegreen.denali.interceptor.SystemErrorInterceptor.intercept(SystemErrorInterceptor.java:89)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.TimerInterceptor.intercept(TimerInterceptor.java:62)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
         at
com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:182)
         at
com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:162)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
         at
com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
         at
com.enginegreen.denali.chrome.filter.ChromeFilter.doFilter(ChromeFilter.java:57)
         at
com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
         at
com.enginegreen.denali.interceptor.HibernateFilter.doFilter(HibernateFilter.java:42)
         at
com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
         at
com.enginegreen.denali.action.DenaliFilter.doFilter(DenaliFilter.java:28)
         at
com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
         at com.caucho.server.http.Invocation.service(Invocation.java:315)
         at
com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
         at
com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
         at
com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
         at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
         at java.lang.Thread.run(Thread.java:534)
WARN  [     SystemErrorInterceptor ] -
com.enginegreen.denali.persistence.PersistenceException:
net.sf.hibernate.JDBCException: could not initialize collection:
[com.enginegreen.ledger.model.InvoiceSummary.orderSummarySet#78828]
         at
com.enginegreen.ledger.invoice.impl.BillingClerkImpl.renderInvoicesAsPDF(BillingClerkImpl.java:429)
         at
com.enginegreen.denali.domain.billing.BillingManagerImpl.finalizeNextBillingPeriod(BillingManagerImpl.java:248)
         at
com.enginegreen.denali.domain.billing.SecureBillingManager.finalizeNextBillingPeriod(SecureBillingManager.java:96)
         at
com.enginegreen.denali.action.billing.GenerateInvoicesAction.doExecute(GenerateInvoicesAction.java:121)
         at
com.enginegreen.denali.action.WorkflowActionSupport.execute(WorkflowActionSupport.java:65)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:172)
         at
com.enginegreen.denali.interceptor.ActionSourceInterceptor.intercept(ActionSourceInterceptor.java:50)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.enginegreen.denali.interceptor.NullInterceptor.intercept(NullInterceptor.java:25)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.enginegreen.denali.interceptor.security.AdminSecurityInterceptor.intercept(AdminSecurityInterceptor.java:31)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.enginegreen.denali.interceptor.SystemErrorInterceptor.intercept(SystemErrorInterceptor.java:47)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.interceptor.TimerInterceptor.intercept(TimerInterceptor.java:62)
         at
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:169)
         at
com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
         at
com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:182)
         at
com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:162)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
         at
com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
         at
com.enginegreen.denali.chrome.filter.ChromeFilter.doFilter(ChromeFilter.java:57)
         at
com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
         at
com.enginegreen.denali.interceptor.HibernateFilter.doFilter(HibernateFilter.java:42)
         at
com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
         at
com.enginegreen.denali.action.DenaliFilter.doFilter(DenaliFilter.java:28)
         at
com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
         at com.caucho.server.http.Invocation.service(Invocation.java:315)
         at
com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
         at
com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
         at
com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
         at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
         at java.lang.Thread.run(Thread.java:534)
Caused by: net.sf.hibernate.JDBCException: could not initialize
collection:
[com.enginegreen.ledger.model.InvoiceSummary.orderSummarySet#78828]
         at
net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:287)
         at
net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3226)
         at
net.sf.hibernate.collection.PersistentCollection.forceInitialization(PersistentCollection.java:340)
         at
net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(SessionImpl.java:3089)
         at
net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
         at net.sf.hibernate.loader.Loader.doList(Loader.java:950)
         at net.sf.hibernate.loader.Loader.list(Loader.java:941)
         at
net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:834)
         at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1512)
         at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
         at
com.enginegreen.ledger.invoice.impl.BillingClerkImpl.renderInvoicesAsPDF(BillingClerkImpl.java:414)
         ... 42 more

******

Caused by: org.postgresql.util.PSQLException: ERROR: out of memory

         at
org.postgresql.util.PSQLException.parseServerError(PSQLException.java:139)
         at
org.postgresql.core.QueryExecutor.executeV3(QueryExecutor.java:154)
         at
org.postgresql.core.QueryExecutor.execute(QueryExecutor.java:101)
         at org.postgresql.core.QueryExecutor.execute(QueryExecutor.java:43)
         at
org.postgresql.jdbc1.AbstractJdbc1Statement.execute(AbstractJdbc1Statement.java:515)
         at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:50)
         at
org.postgresql.jdbc1.AbstractJdbc1Statement.executeQuery(AbstractJdbc1Statement.java:231)
         at
net.sf.hibernate.impl.BatcherImpl.getResultSet(BatcherImpl.java:87)
         at net.sf.hibernate.loader.Loader.getResultSet(Loader.java:795)
         at net.sf.hibernate.loader.Loader.doQuery(Loader.java:189)
         at
net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
         at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:910)
         at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:885)
         at
net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:80)
         at
net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
         ... 52 more