Comments (6)
Thanks for the feedback, I escalated it within the Neo4j team, sorry have never run the Batch-Inserter on a Windows (don't have any). In the meantime could you run your import on a Linux instance (e.g. on ec2) ?
from batch-import.
@vsletten this is a known issue, and should go away if you turn off memory mapping (which should be disabled by default on windows). The performance impact of that may be large, however. If you find performance to be too slow, and you have tuned the memory settings of the batch importer to reasonable levels, consider doing the batch import on an OS X, Unix or Linux system.
from batch-import.
Then it perhaps makes sense to set the mmio-settings to be all smaller or equal to 2G ?
from batch-import.
I am trying to import 2.8M nodes using super fast batch importer. It seems in windows machine has some issue. I am getting below exception. While googling found same issue found before. Looks like issue is still persist.
C:\Tools\NEO4J_Project\batch_importer_20>import.bat graph.db
Usage: Importer data/dir nodes.csv relationships.csv [node_index node-index-name fulltext|exact nodes_index.csv rel_index rel-index-name fulltext|exact rels_index.csv ...
Using: Importer graph.db
Using Existing Configuration File
store_dir=C:\Tools\NEO4J_Project\batch_importer_20\graph.db
use_memory_mapped_buffers=true
neostore.propertystore.db.index.keys.mapped_memory=1M
neostore.propertystore.db.strings.mapped_memory=100M
neostore.propertystore.db.arrays.mapped_memory=215M
neostore.relationshipstore.db.mapped_memory=1000M
batch_import.keep_db=false
neostore.propertystore.db.index.mapped_memory=1M
dump_configuration=true
neostore.propertystore.db.mapped_memory=1000M
cache_type=none
batch_import.csv.delim=;
neostore.nodestore.db.mapped_memory=1000M
batch_import.graph_db=graph.db
batch_import.nodes_files=sample/semicolon_seperated_delimited/txn.csv
............................
Importing 2826680 Nodes took 18 seconds
Exception in thread "main" org.neo4j.kernel.impl.nioneo.store.UnderlyingStorageException: Unable to close store C:\Tools\NEO4J_Project\batch_importer_20\graph.db\neostore
at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.close(CommonAbstractStore.java:596)
at org.neo4j.kernel.impl.nioneo.store.NeoStore.closeStorage(NeoStore.java:253)
at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.close(CommonAbstractStore.java:539)
at org.neo4j.unsafe.batchinsert.BatchInserterImpl.shutdown(BatchInserterImpl.java:992)
at org.neo4j.batchimport.Importer.finish(Importer.java:88)
at org.neo4j.batchimport.Importer.doImport(Importer.java:239)
at org.neo4j.batchimport.Importer.main(Importer.java:83)
Caused by: java.io.IOException: The requested operation cannot be performed on a file with a user-mapped section open
at sun.nio.ch.FileDispatcherImpl.truncate0(Native Method)
at sun.nio.ch.FileDispatcherImpl.truncate(Unknown Source)
at sun.nio.ch.FileChannelImpl.truncate(Unknown Source)
at org.neo4j.kernel.impl.nioneo.store.StoreFileChannel.truncate(StoreFileChannel.java:69)
at org.neo4j.kernel.impl.nioneo.store.StoreFileChannel.truncate(StoreFileChannel.java:28)
at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.close(CommonAbstractStore.java:576)
... 6 more
Should I need to try from linux machine ? Looking forward to hear from you. Thanks
from batch-import.
Hi @rswarup82,
yes linux would be the easiest alternative.
You can try to change the config to use_memory_mapped_buffers=false
and increase the heap size in the batch-script to accomodate 2G + the sum of your configured mmio sizes: i.e. 5GB heap
I would change those to this:
neostore.nodestore.db.mapped_memory=250M
neostore.relationshipstore.db.mapped_memory=1000M
neostore.relationshipgroupstore.db.mapped_memory=10M
neostore.propertystore.db.mapped_memory=500M
neostore.propertystore.db.strings.mapped_memory=500M
neostore.propertystore.db.arrays.mapped_memory=215M
from batch-import.
Hi Michael,
It's working now. Thanks for your quick help.
from batch-import.
Related Issues (20)
- Make Chunker.BUFSIZE a configuration option HOT 1
- Index lookup in relationship file throws NumberFormatException HOT 1
- Cannot connect to graphdb created by batch-import tool in Windows OS HOT 3
- NumberFormatException when importing relationships file HOT 1
- Rename master branch to 1.9 HOT 1
- Slow Import / 2G nodes file HOT 2
- Import Error HOT 1
- Error running batch_importer_22 HOT 3
- No relations input
- How can I know which line is it crashing on? HOT 1
- View graph in Neo4j Browser after importing HOT 3
- Imported csv files successfully but query results are empty
- common interface for BatchInserter and GraphDatabaseService?
- Why Batch-Importer is not work when i import about one hundred million nodes?
- Improt error,emergency!!!!
- How can i use this tool to import data that may be duplicated HOT 1
- Download link to binary is broken HOT 2
- Failed to load csv in Neo4j Ver 3.3
- An exception occured while executing the Java class. More than one element in org.mapdb.Bind$5$1@46248627. First element is '983727989' and the second element is '997379223' HOT 1
- version 3.4.0
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from batch-import.