What operating system and file system are you using? “Input/output error” 
doesn’t say much. Try asking your OS vendor as well.

--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]


> On 11 Apr 2015, at 22:05, Alexander Kuprin <[email protected]> wrote:
> 
> Hello!
> 
> I'm using neo4j 1.9.9
> Embedded
> Here is my error log:
> 
> org.neo4j.kernel.impl.nioneo.store.UnderlyingStorageException: Unable to load 
> position[45503670] @[1501621110]
>       at 
> org.neo4j.kernel.impl.nioneo.store.PersistenceRow.readFullWindow(PersistenceRow.java:162)
>       at 
> org.neo4j.kernel.impl.nioneo.store.PersistenceRow$State$1.transition(PersistenceRow.java:114)
>       at 
> org.neo4j.kernel.impl.nioneo.store.PersistenceRow.lock(PersistenceRow.java:58)
>       at 
> org.neo4j.kernel.impl.nioneo.store.PersistenceWindowPool.acquire(PersistenceWindowPool.java:200)
>       at 
> org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.acquireWindow(CommonAbstractStore.java:543)
>       at 
> org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:344)
>       at 
> org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:122)
>       at 
> org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:105)
>       at 
> org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:106)
>       at 
> org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:738)
>       at 
> org.neo4j.kernel.impl.core.NodeImpl.loadMoreRelationshipsFromNodeManager(NodeImpl.java:581)
>       at 
> org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:544)
>       at 
> org.neo4j.kernel.impl.core.RelationshipIterator.fetchNextOrNull(RelationshipIterator.java:98)
>       at 
> org.neo4j.kernel.impl.core.RelationshipIterator.fetchNextOrNull(RelationshipIterator.java:36)
>       at 
> org.neo4j.helpers.collection.PrefetchingIterator.hasNext(PrefetchingIterator.java:55)
>       at 
> org.neo4j.helpers.collection.NestingIterator.fetchNextOrNull(NestingIterator.java:69)
>       at 
> org.neo4j.helpers.collection.PrefetchingIterator.hasNext(PrefetchingIterator.java:55)
>       at 
> org.neo4j.kernel.impl.traversal.TraversalBranchImpl.next(TraversalBranchImpl.java:135)
>       at 
> org.neo4j.kernel.impl.traversal.TraversalBranchWithState.next(TraversalBranchWithState.java:32)
>       at 
> org.neo4j.kernel.impl.traversal.StartNodeTraversalBranch.next(StartNodeTraversalBranch.java:50)
>       at 
> org.neo4j.kernel.PreorderBreadthFirstSelector.next(PreorderBreadthFirstSelector.java:52)
>       at 
> org.neo4j.kernel.impl.traversal.TraverserIterator.fetchNextOrNull(TraverserIterator.java:65)
>       at 
> org.neo4j.kernel.impl.traversal.TraverserIterator.fetchNextOrNull(TraverserIterator.java:34)
>       at 
> org.neo4j.helpers.collection.PrefetchingIterator.hasNext(PrefetchingIterator.java:55)
>       at 
> org.neo4j.kernel.impl.traversal.OldTraverserWrapper$TraverserImpl.hasNext(OldTraverserWrapper.java:76)
>       ...
> Caused by: java.io.IOException: Input/output error
>       at sun.nio.ch.FileDispatcherImpl.pread0(Native Method)
>       at sun.nio.ch.FileDispatcherImpl.pread(FileDispatcherImpl.java:51)
>       at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:215)
>       at sun.nio.ch.IOUtil.read(IOUtil.java:191)
>       at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:674)
>       at 
> org.neo4j.kernel.impl.nioneo.store.StoreFileChannel.read(StoreFileChannel.java:83)
>       at 
> org.neo4j.kernel.impl.nioneo.store.PersistenceRow.readFullWindow(PersistenceRow.java:157)
>       ... 108 more
> 
> 
> What can I do?
> 
> Thanks
> 
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