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From ulf schneider ...@datenlabor.net>
Subject Re: too many open files / derby / suse
Date Mon, 28 Nov 2011 13:49:30 GMT
yukka and thomas,
thanks a lot for your help. i've configured

/etc/security/limits.conf
* soft nofile 10240
* hard nofile 10240

and as far as i can see the failure is gone.

@thomas: you suggested to use H2. would it be possible to replace derby with H2 but reuse
the file structure that has already been created by derby? 
--
ulf schneider
+49 163 2505164
mail: us@datenlabor.net
blog: http://allesagil.net

datenlabor gmbh
sitz: paderborn, hrb 8819
geschäftsführer: ulf schneider
http://datenlabor.net

Am 28.11.2011 um 13:23 schrieb Thomas Mueller:

> Hi,
> 
> Could you run "lsof" to find out what files are open? I guess most files
> are open in a different area (not Derby). If it really is Derby, then an
> option is to use another database, for example H2 (disclaimer: I'm one of
> the committers of H2).
> 
> Regards,
> Thomas
> 
> 
> On 11/28/11 1:17 PM, "ulf schneider" <us@datenlabor.net> wrote:
> 
>> dear developers,
>> i'm running a jackrabbit system with several workspaces (15) and using
>> derby as embedded database on suse linux.
>> since a few days and after adding another workspace i get exceptions like
>> the one that i've attached to this e-mail (reproducable with jackrabbit
>> 2.2.9 and 2.2.10). i'm suspecting that the failure is originated by the
>> number of workspaces.
>> ulimit -n prints out a value of 1024.
>> 
>> do you have recommendations how to deal with this issue?
>> 
>> best regards, ulf.
>> 
>> 
>> 2011.11.27 13:11:00.087 ERROR [DbUtility.java:92] failed to close
>> Connection
>> 2011.11.27 13:11:00.087 ERROR [DbUtility.java:94]        Reason: Already
>> closed.
>> 2011.11.27 13:11:00.088 ERROR [DbUtility.java:95]    State/Code: null/0
>> 2011.11.27 13:11:00.095 ERROR [ConnectionHelper.java:498] Failed to
>> execute SQL (stacktrace on DEBUG log level)
>> org.apache.commons.dbcp.SQLNestedException: Borrow prepareStatement from
>> pool failed
>>       at
>> org.apache.commons.dbcp.PoolingConnection.prepareStatement(PoolingConnecti
>> on.java:98) ~[commons-dbcp-1.2.2.jar:1.2.2]
>>       at
>> org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingCo
>> nnection.java:248) ~[commons-dbcp-1.2.2.jar:1.2.2]
>>       at
>> org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepa
>> reStatement(PoolingDataSource.java:302) ~[commons-dbcp-1.2.2.jar:1.2.2]
>>       at
>> org.apache.jackrabbit.core.util.db.ConnectionHelper.reallyExec(ConnectionH
>> elper.java:387) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.util.db.ConnectionHelper$3.call(ConnectionHelpe
>> r.java:371) ~[jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.util.db.ConnectionHelper$3.call(ConnectionHelpe
>> r.java:367) ~[jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.util.db.ConnectionHelper$RetryManager.doTry(Con
>> nectionHelper.java:494) ~[jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.util.db.ConnectionHelper.exec(ConnectionHelper.
>> java:367) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.persistence.pool.BundleDbPersistenceManager.loa
>> dReferencesTo(BundleDbPersistenceManager.java:1141)
>> [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.state.SharedItemStateManager.getNodeReferences(
>> SharedItemStateManager.java:335) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.state.LocalItemStateManager.getNodeReferences(L
>> ocalItemStateManager.java:218) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.state.XAItemStateManager.getReferences(XAItemSt
>> ateManager.java:372) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.state.XAItemStateManager.hasNodeReferences(XAIt
>> emStateManager.java:335) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.state.SessionItemStateManager.hasNodeReferences
>> (SessionItemStateManager.java:198) [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.NodeImpl.getReferences(NodeImpl.java:3028)
>> [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> org.apache.jackrabbit.core.NodeImpl.getReferences(NodeImpl.java:2406)
>> [jackrabbit-core-2.2.10.jar:2.2.10]
>>       at
>> dlab.content.ocm.OCMStorer.removeTaggingReferences(OCMStorer.java:459)
>> [dlab_content_1.4.2.jar:na]
>>       at dlab.content.ocm.OCMStorer.storeTagging(OCMStorer.java:1064)
>> [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.ocm.OCMStorer.storeFinalProperty(OCMStorer.java:789)
>> [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.ocm.ObjectContentMapperJsr170.traverseAndStoreObject(ObjectCo
>> ntentMapperJsr170.java:1025) [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.ocm.ObjectContentMapperJsr170.traverseAndStoreObject(ObjectCo
>> ntentMapperJsr170.java:1066) [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.ocm.ObjectContentMapperJsr170.setContent(ObjectContentMapperJ
>> sr170.java:698) [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.ocm.ObjectContentMapperJsr170.setContent(ObjectContentMapperJ
>> sr170.java:710) [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.service.ContentService.storeContent(ContentService.java:2908)
>> [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.content.service.ContentService.storeContent(ContentService.java:2859)
>> [dlab_content_1.4.2.jar:na]
>>       at
>> dlab.docker.document.DocumentEditablePage.store(DocumentEditablePage.java:
>> 608) [dlab_docker_templating_1.4.2.jar:na]
>>       at
>> dlab.docker.document.DocumentEditablePage.onSubmit(DocumentEditablePage.ja
>> va:510) [dlab_docker_templating_1.4.2.jar:na]
>>       at
>> dlab.web.dialog.DialogEditablePage$1.onSubmit(DialogEditablePage.java:116)
>> [dlab_web_1.4.2.jar:na]
>>       at
>> org.apache.wicket.markup.html.form.Form$10.component(Form.java:1189)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.markup.html.form.Form$10.component(Form.java:1184)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.util.visit.Visits.visitPostOrderHelper(Visits.java:273)
>> [wicket-util-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.util.visit.Visits.visitPostOrder(Visits.java:244)
>> [wicket-util-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1182)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at org.apache.wicket.markup.html.form.Form.process(Form.java:838)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:762)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:692)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at sun.reflect.GeneratedMethodAccessor175.invoke(Unknown Source)
>> ~[na:na]
>>       at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm
>> pl.java:25) ~[na:1.6.0_17]
>>       at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_17]
>>       at
>> org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerI
>> nterface.java:260) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface
>> .java:216) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.invokeLi
>> stener(ListenerInterfaceRequestHandler.java:248)
>> [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.handler.ListenerInterfaceRequestHandler.respond(
>> ListenerInterfaceRequestHandler.java:234) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(Reque
>> stCycle.java:750) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.
>> java:64) [wicket-request-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:252
>> ) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.j
>> ava:209) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(Reque
>> stCycle.java:280) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.j
>> ava:162) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:21
>> 8) [wicket-core-1.5.3.jar:1.5.3]
>>       at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applicati
>> onFilterChain.java:235) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilter
>> Chain.java:206) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.
>> java:233) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.
>> java:174) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:1
>> 28) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:1
>> 02) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.ja
>> va:109) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286
>> ) [catalina-6.0.16.jar:na]
>>       at
>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>> [tomcat-coyote-6.0.16.jar:na]
>>       at
>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Ht
>> tp11Protocol.java:583) [tomcat-coyote-6.0.16.jar:na]
>>       at
>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>> [tomcat-coyote-6.0.16.jar:na]
>>       at java.lang.Thread.run(Thread.java:619) [na:1.6.0_17]
>> Caused by: java.sql.SQLException: Meta-data for Container
>> org.apache.derby.impl.store.raw.data.RAFContainer4@3e6e4eff could not be
>> accessed
>>       at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unkn
>> own Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
>> ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
>> ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.commons.dbcp.PoolingConnection.makeObject(PoolingConnection.jav
>> a:193) ~[commons-dbcp-1.2.2.jar:1.2.2]
>>       at
>> org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKe
>> yedObjectPool.java:797) ~[commons-pool-1.3.jar:1.3]
>>       at
>> org.apache.commons.dbcp.PoolingConnection.prepareStatement(PoolingConnecti
>> on.java:92) ~[commons-dbcp-1.2.2.jar:1.2.2]
>>       ... 61 common frames omitted
>> Caused by: org.apache.derby.impl.jdbc.EmbedSQLException: Meta-data for
>> Container org.apache.derby.impl.store.raw.data.RAFContainer4@3e6e4eff
>> could not be accessed
>>       at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcros
>> sDRDA(Unknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       ... 78 common frames omitted
>> Caused by: org.apache.derby.impl.jdbc.EmbedSQLException: Java exception:
>> '/srv/docker/workspaces/CRM/db/seg0/c3f1.dat (Too many open files):
>> java.io.FileNotFoundException'.
>>       at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcros
>> sDRDA(Unknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
>> ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unkn
>> own Source) ~[derby-10.5.3.0_1.jar:na]
>>       ... 75 common frames omitted
>> Caused by: java.io.FileNotFoundException:
>> /srv/docker/workspaces/CRM/db/seg0/c3f1.dat (Too many open files)
>>       at java.io.RandomAccessFile.open(Native Method) ~[na:1.6.0_17]
>>       at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
>> ~[na:1.6.0_17]
>>       at org.apache.derby.impl.io.DirRandomAccessFile.<init>(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.io.DirRandomAccessFile4.<init>(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.io.DirFile4.getRandomAccessFile(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.store.raw.data.RAFContainer.run(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at java.security.AccessController.doPrivileged(Native Method)
>> ~[na:1.6.0_17]
>>       at
>> org.apache.derby.impl.store.raw.data.RAFContainer.openContainer(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.raw.data.RAFContainer4.openContainer(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.raw.data.FileContainer.setIdent(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.raw.data.RAFContainer.setIdentity(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.services.cache.ConcurrentCache.find(Unknown Source)
>> ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.raw.data.BaseDataFileFactory.openContainer(Unk
>> nown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.raw.data.BaseDataFileFactory.openContainer(Unk
>> nown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.raw.xact.Xact.openContainer(Unknown Source)
>> ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.access.btree.index.B2IFactory.readConglomerate
>> (Unknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.access.RAMAccessManager.conglomCacheFind(Unkno
>> wn Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.access.RAMTransaction.findExistingConglomerate
>> (Unknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.store.access.RAMTransaction.openStoreCost(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.CompilerContextImpl.getStoreCostControll
>> er(Unknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.FromBaseTable.getStoreCostController(Unk
>> nown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.FromBaseTable.estimateCost(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.OptimizerImpl.estimateTotalCost(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.OptimizerImpl.costBasedCostOptimizable(U
>> nknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.OptimizerImpl.costOptimizable(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.FromBaseTable.optimizeIt(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.ProjectRestrictNode.optimizeIt(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.OptimizerImpl.costPermutation(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.sql.compile.SelectNode.optimize(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(Unkno
>> wn Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown
>> Source) ~[derby-10.5.3.0_1.jar:na]
>>       at
>> org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInt
>> ernalStatement(Unknown Source) ~[derby-10.5.3.0_1.jar:na]
>>       ... 71 common frames omitted
>> --
>> ulf schneider
>> +49 163 2505164
>> mail: us@datenlabor.net
>> blog: http://allesagil.net
>> 
>> datenlabor gmbh
>> sitz: paderborn, hrb 8819
>> geschäftsführer: ulf schneider
>> http://datenlabor.net
>> 
>> Am 25.11.2011 um 18:01 schrieb Julian Reschke:
>> 
>>> On 2011-11-25 17:36, Alex Parvulescu wrote:
>>>> ok, I kinda lost here
>>>> 
>>>> any ideas how the root node can be sometimes protected?
>>>> 
>>>> 
>>>> http://www.day.com/maven/javax.jcr/javadocs/jcr-2.0/javax/jcr/nodetype/I
>>>> temDefinition.html#isProtected()
>>>> http://www.day.com/specs/jcr/2.0/3_Repository_Model.html#3.7.2.2
>>>> Protected
>>>> 
>>>> alex
>>>> ...
>>> 
>>> What's the actual node type definition?
>> 
> 


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