MapDB schema index provider for Neo4j 2.0
Implements a Schema Index Provider for Neo4j 2.0, label based indexes using MapDB, which is a high performance, persistent map implementation using compression and custom serialization.
It also supports snapshots which are required by a Schema Index Provider for repeatable reads.
mvn clean install
That will create a zip-file: target/mapdb-index-1.0-provider.zip whose content you have to put in Neo4j's classpath.
I'm struggling with upgrading this mapdb index provider implementation to neo4j 2.0.1 and mapdb 0.9.11
I'm always getting the following error:
java.lang.UnsupportedOperationException: Snapshots are not enabled, use DBMaker.snapshotEnable()
at org.mapdb.TxEngine.createSnapshotFor(TxEngine.java:72) ~[mapdb-index-1.0-jar-with-dependencies.jar:na]
at org.mapdb.BTreeMap.snapshot(BTreeMap.java:2752) ~[mapdb-index-1.0-jar-with-dependencies.jar:na]
at org.neo4j.index.mapdb.MapDbSchemaIndexProvider$MapDbIndex.newReader(MapDbSchemaIndexProvider.java:243)
albeit, I'm initialising the mapdb instance with
db = DBMaker.newFileDB(getIndexFile(config)).compressionEnable().asyncWriteFlushDelay(1).closeOnJvmShutdown().snapshotEnable().make();
I can run your tests successfully, however, when I deploy it to my stand-alone installation and try to run it with my unmanaged extension, then it doesn't work and I'm getting the error from above.
Thx a lot in advance for your help.
Here's the full stack trace. When I disable compression it goes away. Probably an issue in MapDB, but I'll post this here for now.
Exception in thread "main" org.neo4j.graphdb.TransactionFailureException: Unable to commit transaction
at org.neo4j.kernel.TopLevelTransaction.finish(TopLevelTransaction.java:143)
at Main$$anonfun$main$1.apply$mcVI$sp(neotest.scala:36)
at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:141)
at Main$.main(neotest.scala:27)
at Main.main(neotest.scala)
Caused by: org.neo4j.graphdb.TransactionFailureException: commit threw exception
at org.neo4j.kernel.impl.transaction.TxManager.commit(TxManager.java:426)
at org.neo4j.kernel.impl.transaction.TxManager.commit(TxManager.java:349)
at org.neo4j.kernel.impl.transaction.TransactionImpl.commit(TransactionImpl.java:128)
at org.neo4j.kernel.TopLevelTransaction.finish(TopLevelTransaction.java:127)
... 4 more
Caused by: javax.transaction.xa.XAException
at org.neo4j.kernel.impl.transaction.TransactionImpl.doCommit(TransactionImpl.java:575)
at org.neo4j.kernel.impl.transaction.TxManager.commit(TxManager.java:388)
... 7 more
Caused by: java.lang.RuntimeException: Writer thread failed
at org.mapdb.AsyncWriteEngine.checkState(AsyncWriteEngine.java:158)
at org.mapdb.AsyncWriteEngine.update(AsyncWriteEngine.java:182)
at org.mapdb.EngineWrapper.update(EngineWrapper.java:55)
at org.mapdb.SnapshotEngine.update(SnapshotEngine.java:82)
at org.mapdb.CacheHashTable.update(CacheHashTable.java:106)
at org.mapdb.BTreeMap.put2(BTreeMap.java:665)
at org.mapdb.BTreeMap.put(BTreeMap.java:599)
at org.neo4j.index.mapdb.MapDbSchemaIndexProvider$MapDbIndex.add(MapDbSchemaIndexProvider.java:102)
at org.neo4j.index.mapdb.MapDbSchemaIndexProvider$MapDbIndex.update(MapDbSchemaIndexProvider.java:128)
at org.neo4j.index.mapdb.MapDbSchemaIndexProvider$MapDbIndex.updateAndCommit(MapDbSchemaIndexProvider.java:146)
at org.neo4j.kernel.impl.api.index.OnlineIndexProxy.update(OnlineIndexProxy.java:55)
at org.neo4j.kernel.impl.api.index.FlippableIndexProxy.update(FlippableIndexProxy.java:91)
at org.neo4j.kernel.impl.api.index.AbstractDelegatingIndexProxy.update(AbstractDelegatingIndexProxy.java:44)
at org.neo4j.kernel.impl.api.index.ContractCheckingIndexProxy.update(ContractCheckingIndexProxy.java:95)
at org.neo4j.kernel.impl.api.index.AbstractDelegatingIndexProxy.update(AbstractDelegatingIndexProxy.java:44)
at org.neo4j.kernel.impl.api.index.RuleUpdateFilterIndexProxy.update(RuleUpdateFilterIndexProxy.java:49)
at org.neo4j.kernel.impl.api.index.AbstractDelegatingIndexProxy.update(AbstractDelegatingIndexProxy.java:44)
at org.neo4j.kernel.impl.api.index.IndexingService.updateIndexes(IndexingService.java:279)
at org.neo4j.kernel.impl.nioneo.xa.WriteTransaction.applyCommit(WriteTransaction.java:620)
at org.neo4j.kernel.impl.nioneo.xa.WriteTransaction.doCommit(WriteTransaction.java:574)
at org.neo4j.kernel.impl.transaction.xaframework.XaTransaction.commit(XaTransaction.java:321)
at org.neo4j.kernel.impl.transaction.xaframework.XaResourceManager.commit(XaResourceManager.java:488)
at org.neo4j.kernel.impl.transaction.xaframework.XaResourceHelpImpl.commit(XaResourceHelpImpl.java:64)
at org.neo4j.kernel.impl.transaction.TransactionImpl.doCommit(TransactionImpl.java:567)
... 8 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1375
at org.mapdb.CompressLZF.compress(CompressLZF.java:223)
at org.mapdb.CompressLZF$1.serialize(CompressLZF.java:307)
at org.mapdb.CompressLZF$1.serialize(CompressLZF.java:287)
at org.mapdb.StoreDirect.serialize(StoreDirect.java:685)
at org.mapdb.StoreWAL.update(StoreWAL.java:219)
at org.mapdb.EngineWrapper$ByteTransformEngine.update(EngineWrapper.java:213)
at org.mapdb.EngineWrapper.update(EngineWrapper.java:55)
at org.mapdb.AsyncWriteEngine.access$401(AsyncWriteEngine.java:33)
at org.mapdb.AsyncWriteEngine$2.run(AsyncWriteEngine.java:112)
Exception in thread "JDBM shutdown" java.lang.RuntimeException: Writer thread failed
at org.mapdb.AsyncWriteEngine.checkState(AsyncWriteEngine.java:158)
at org.mapdb.AsyncWriteEngine.close(AsyncWriteEngine.java:222)
at org.mapdb.EngineWrapper.close(EngineWrapper.java:72)
at org.mapdb.EngineWrapper.close(EngineWrapper.java:72)
at org.mapdb.CacheHashTable.close(CacheHashTable.java:158)
at org.mapdb.DBMaker$1.run(DBMaker.java:623)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1375
at org.mapdb.CompressLZF.compress(CompressLZF.java:223)
at org.mapdb.CompressLZF$1.serialize(CompressLZF.java:307)
at org.mapdb.CompressLZF$1.serialize(CompressLZF.java:287)
at org.mapdb.StoreDirect.serialize(StoreDirect.java:685)
at org.mapdb.StoreWAL.update(StoreWAL.java:219)
at org.mapdb.EngineWrapper$ByteTransformEngine.update(EngineWrapper.java:213)
at org.mapdb.EngineWrapper.update(EngineWrapper.java:55)
at org.mapdb.AsyncWriteEngine.access$401(AsyncWriteEngine.java:33)
at org.mapdb.AsyncWriteEngine$2.run(AsyncWriteEngine.java:112)
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