Neo4j：無法實例化BatchInserter

Question

嘗試創建org.neo4j.unsafe.batchinsert.BatchInserter時遇到以下錯誤

Caused by: java.lang.IllegalStateException: Misaligned file size 68 for DynamicArrayStore[fileName:neostore.nodestore.db.labels, blockSize:60], expected version length 25
    at org.neo4j.kernel.impl.store.AbstractDynamicStore.verifyFileSizeAndTruncate(AbstractDynamicStore.java:265)
    at org.neo4j.kernel.impl.store.CommonAbstractStore.loadStorage(CommonAbstractStore.java:230)
    at org.neo4j.kernel.impl.store.CommonAbstractStore.<init>(CommonAbstractStore.java:118)
    at org.neo4j.kernel.impl.store.AbstractDynamicStore.<init>(AbstractDynamicStore.java:92)
    at org.neo4j.kernel.impl.store.DynamicArrayStore.<init>(DynamicArrayStore.java:64)
    at org.neo4j.kernel.impl.store.StoreFactory.newNodeStore(StoreFactory.java:328)
    at org.neo4j.kernel.impl.store.StoreFactory.newNodeStore(StoreFactory.java:317)
    at org.neo4j.kernel.impl.store.StoreFactory.newNeoStore(StoreFactory.java:161)
    at org.neo4j.unsafe.batchinsert.BatchInserterImpl.<init>(BatchInserterImpl.java:262)
    at org.neo4j.unsafe.batchinsert.BatchInserters.inserter(BatchInserters.java:87)
    at org.neo4j.unsafe.batchinsert.BatchInserters.inserter(BatchInserters.java:81)
    at org.neo4j.unsafe.batchinsert.BatchInserters.inserter(BatchInserters.java:56)
    at nl.aegon.maintenance.config.MainConfiguration.getBatchInserter(MainConfiguration.java:137)
    at nl.aegon.maintenance.config.MainConfiguration$$EnhancerBySpringCGLIB$$a40c43d.CGLIB$getBatchInserter$6(<generated>)
    at nl.aegon.maintenance.config.MainConfiguration$$EnhancerBySpringCGLIB$$a40c43d$$FastClassBySpringCGLIB$$1b2b386e.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:309)
    at nl.aegon.maintenance.config.MainConfiguration$$EnhancerBySpringCGLIB$$a40c43d.getBatchInserter(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
    ... 62 more

您可以在下面找到我的Java配置類的代碼段

private static class configurationSettings extends HashMap<String, String> {
    {
      put("dump_configuration", "false");
      put("cache_type", "none");
      put("use_memory_mapped_buffers", "true");
      put("neostore.propertystore.db.index.keys.mapped_memory", "5M");
      put("neostore.propertystore.db.index.mapped_memory", "5M");
      put("neostore.nodestore.db.mapped_memory", "200M");
      put("neostore.relationshipstore.db.mapped_memory", "500M");
      put("neostore.propertystore.db.mapped_memory", "200M");
      put("neostore.propertystore.db.strings.mapped_memory", "200M");
    }
  }

@Bean
  public BatchInserter getBatchInserter() {
    LOG.debug("Initialising a batch inserter with store directory: {}", databaseConnectionProperties.getStoreDirectory());
    return BatchInserters.inserter(databaseConnectionProperties.getStoreDirectory(), new configurationSettings());
  }

克服此錯誤的正確配置屬性應該是什么？ 我正在嘗試批量並行導入，每個3 MB，每個64 MB

我在git hub https://github.com/jexp/batch-import/blob/2.2/sample/batch.properties中提到了以下內容

這是Neo4j拋出異常的相關方法

/**
     * Note: This method runs before the file has been mapped by the page cache, and therefore needs to
     * operate on the store files directly. This method is called by constructors.
     */
@Override
    protected void verifyFileSizeAndTruncate() throws IOException
    {
        int expectedVersionLength = UTF8.encode( buildTypeDescriptorAndVersion( getTypeDescriptor() ) ).length;
        long fileSize = getFileChannel().size();
        if ( (fileSize - expectedVersionLength) % blockSize != 0 )
        {
            setStoreNotOk( new IllegalStateException(
                    "Misaligned file size " + fileSize + " for " + this + ", expected version length " +
                    expectedVersionLength ) );
        }
        if ( getStoreOk() )
        {
            getFileChannel().truncate( fileSize - expectedVersionLength );
        }
    }

我在OSX上使用的是Java 8，SDN4和neo4j 2.2.5。

Answer 1

配置選項已過時，

對於mmio僅使用dbms.pagecache.memory=1500M

批處理插入器是單線程的，您不能在多線程環境中使用它。

您要插入多少數據？

您是否研究過neo4j-import工具？

高度並發的初始並行批量插入器的基礎API也可以直接使用，但使用起來並不容易。

如果您真的知道自己在做什么，請查看以下內容： https : //github.com/jexp/neo4j-dataset-import

Answer 2

問題可能是您試圖在尚未完全關閉的現有商店上啟動BatchInserter。 是嗎

Answer 3

我發現啟動並關閉具有該storeDir的普通neo4j服務器可以解決此問題。

我認為這是由於上次運行未能調用BatchInserter.shutdown()引起的。