Hi,
I've look at the mailing list and found 1 similar situation, but no real
solution. So I was hoping someone could shed some light on this.
I seem to have an issue with neo4j being able to use memory mapped files.
I've run my service on Win XP 64bit, Mac OSX Snow Leopard 10.6.2 and Centos
5.x 64bit and always get the same error when launching. I'm using APOC 1.0
and have a DB of approx 600M. In my neo config I allocate about 5M more for
each type of file than the actual file size (I've tried multiple different
settings). On each machine I also leave at least 1.5G for the OS and have at
least 2.5G heap for the Java process. I'm also using the
classes EmbeddedReadOnlyGraphDatabase and LuceneReadOnlyIndexService to
access and browse DB.
Neo config
neostore.nodestore.db.mapped_memory=10M
neostore.relationshipstore.db.mapped_memory=110M
neostore.propertystore.db.mapped_memory=85M
neostore.propertystore.db.index.mapped_memory=10M
neostore.propertystore.db.index.keys.mapped_memory=10M
neostore.propertystore.db.strings.mapped_memory=320M
neostore.propertystore.db.arrays.mapped_memory=10M
Here is the error
org.neo4j.kernel.impl.nioneo.store.MappedMemException: Unable to map
pos=3005872 recordSize=33 totalSize=1153416
at
org.neo4j.kernel.impl.nioneo.store.MappedPersistenceWindow.<init>(MappedPersistenceWindow.java:59)
at
org.neo4j.kernel.impl.nioneo.store.PersistenceWindowPool.allocateNewWindow(PersistenceWindowPool.java:530)
at
org.neo4j.kernel.impl.nioneo.store.PersistenceWindowPool.refreshBricks(PersistenceWindowPool.java:430)
at
org.neo4j.kernel.impl.nioneo.store.PersistenceWindowPool.acquire(PersistenceWindowPool.java:122)
at
org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.acquireWindow(CommonAbstractStore.java:459)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:248)
at
org.neo4j.kernel.impl.nioneo.xa.NeoReadTransaction.getMoreRelationships(NeoReadTransaction.java:103)
at
org.neo4j.kernel.impl.nioneo.xa.NioNeoDbPersistenceSource$ReadOnlyResourceConnection.getMoreRelationships(NioNeoDbPersistenceSource.java:275)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:93)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:585)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:332)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureFullRelationships(NodeImpl.java:320)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:129)
at
org.neo4j.kernel.impl.core.NodeImpl.getSingleRelationship(NodeImpl.java:179)
at
org.neo4j.kernel.impl.core.NodeProxy.getSingleRelationship(NodeProxy.java:98)
....
Caused by: java.io.IOException: Access is denied
at sun.nio.ch.FileChannelImpl.truncate0(Native Method)
at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:728)
at
org.neo4j.kernel.impl.nioneo.store.MappedPersistenceWindow.<init>(MappedPersistenceWindow.java:53)
... 78 more
Regards
Marc
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