We don't recommend to run write transaction on the slaves just on the master. As each transaction on the slave will grab a global cluster lock to sync the tx with the master and only after the master tx commits the slave tx also commits.
Rather write on the master and use push_factor and pull_interval to distribute the changes across the cluster. Cheers Michael Am 21.01.2014 um 07:04 schrieb Ramesh Yakkala <ramesh.yakk...@gmail.com>: > Hi, > > I have setup the neo4j HA environment using the neo4j-enterprise-1.9.5 > enterprise trailer version in the local machine with three instances > master,slave1,slave2 with 128MB to 256MB of JVM ram memory. > > Deployed unmanaged server extension of my application on each instance. > > I have observed that there is low performance of processing speed on slaves > compared to master server instance. > > And some times on slaves failing the transactions to process.Here I am giving > the different error messages. > =============================================================================== > org.neo4j.graphdb.TransactionFailureException: Unable to commit transaction > at > org.neo4j.kernel.TopLevelTransaction.finish(TopLevelTransaction.java:143) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.createTransactionRootNode(DefaultDelegator.java:312) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.persistX12EnvolpeData(DefaultDelegator.java:112) > at > com.pokitdok.ohp.mappings.handler.JsonXsdNeo4jHandler.persistX12Envelope(JsonXsdNeo4jHandler.java:143) > at > com.pokitdok.ohp.restservice.PersistService.storeX12File(PersistService.java:328) > at > com.pokitdok.ohp.restservice.PersistService.persistX12Folder(PersistService.java:165) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > ======================================================================================== > > 2014-01-20 11:34:48.182+0000 DEBUG [o.n.k.h.c.s.MasterClient18]: ResourcePool > create resource ([id: 0x37074f62, /127.0.0.1:62366 => /127.0.0.1:6001], > DynamicChannelBuffer(ridx=0, widx=0, cap=256), java.nio.HeapByteBuffer[pos=0 > lim=1048576 cap=1048576]) > 2014-01-20 11:34:49.245+0000 ERROR [o.n.k.i.t.TxManager]: setting TM not OK > javax.transaction.xa.XAException: null > at > org.neo4j.kernel.impl.transaction.TransactionImpl.doCommit(TransactionImpl.java:576) > [neo4j-kernel-1.9.5.jar:1.9.5] > at > org.neo4j.kernel.impl.transaction.TxManager.commit(TxManager.java:394) > [neo4j-kernel-1.9.5.jar:1.9.5] > at > org.neo4j.kernel.impl.transaction.TxManager.commit(TxManager.java:344) > [neo4j-kernel-1.9.5.jar:1.9.5] > at > org.neo4j.kernel.impl.transaction.TransactionImpl.commit(TransactionImpl.java:134) > [neo4j-kernel-1.9.5.jar:1.9.5] > at > org.neo4j.kernel.TopLevelTransaction.finish(TopLevelTransaction.java:127) > [neo4j-kernel-1.9.5.jar:1.9.5] > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.createTransactionRootNode(DefaultDelegator.java:312) > [neo4jlayer-0.0.1-SNAPSHOT-jar-with-depe > > =================================================================================================================================== > org.neo4j.graphdb.TransactionFailureException: Could not get current > transaction. > at > org.neo4j.kernel.impl.transaction.RagManager.getCurrentTransaction(RagManager.java:320) > at > org.neo4j.kernel.impl.transaction.RWLock.acquireWriteLock(RWLock.java:336) > at > org.neo4j.kernel.impl.transaction.LockManagerImpl.getWriteLock(LockManagerImpl.java:170) > at > org.neo4j.kernel.impl.transaction.LockManagerImpl.getWriteLock(LockManagerImpl.java:135) > at > org.neo4j.kernel.ha.lock.SlaveLockManager.getWriteLock(SlaveLockManager.java:158) > at > org.neo4j.kernel.impl.core.WritableTransactionState.acquireWriteLock(WritableTransactionState.java:268) > at > org.neo4j.kernel.impl.core.NodeManager.createNode(NodeManager.java:196) > at > org.neo4j.kernel.InternalAbstractGraphDatabase.createNode(InternalAbstractGraphDatabase.java:949) > at > com.pokitdok.ohp.datastore.neo4j.NeoDBAccess.createNode(NeoDBAccess.java:187) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.createEntityNode(DefaultDelegator.java:546) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.createNode(DefaultDelegator.java:523) > at > com.pokitdok.ohp.mappings.x12271.Xsd271Delegator.persistLoop2000C(Xsd271Delegator.java:388) > at > com.pokitdok.ohp.mappings.x12271.Xsd271Delegator.persistLoop2000B(Xsd271Delegator.java:301) > at > com.pokitdok.ohp.mappings.x12271.Xsd271Delegator.persist271Data(Xsd271Delegator.java:246) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.persistx12271(DefaultDelegator.java:359) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.createTransactionRootNode(DefaultDelegator.java:254) > at > com.pokitdok.ohp.mappings.delegator.DefaultDelegator.persistX12EnvolpeData(DefaultDelegator.java:112) > at > com.pokitdok.ohp.mappings.handler.JsonXsdNeo4jHandler.persistX12Envelope(JsonXsdNeo4jHandler.java:143) > at > com.pokitdok.ohp.restservice.PersistService.storeX12File(PersistService.java:328) > at > com.pokitdok.ohp.restservice.PersistService.persistX12Folder(PersistService.java:165) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > ============================================================================================ > > > Please let me know how to resolve the issue. > > Thanks, > Ramesh Yakkala. > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neo4j+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > <neo4j-wrapper.conf><log.rar><neo4j.properties><neo4j-server.properties><neo4j1.error><neo4j2.error><neo4j3.error> -- You received this message because you are subscribed to the Google Groups "Neo4j" group. 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