泰坦無法連接到卡桑德拉

Question

我正在嘗試使用以下代碼編寫代碼以將Tital連接到此Cassandra：

    TitanGraph graph = TitanFactory.build()
            .set("storage.backend","cassandra")
            .set("storage.hostname","127.0.0.1")
            .open();

但是，我收到此錯誤 ：

線程“主”中的異常java.lang.IllegalArgumentException：無法實例化實現：com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate（ConfigurationUtil.java:55上的com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager ）在com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass（Backend.java:473）在com.thinkaurelius.titan.diskstorage.Backend.getStorageManager（Backend.java:407）在com.thinkaurelius.titan.graphdb.configuration。 com處com.thinkaurelius.titan.core.TitanFactory.open（TitanFactory.java:94）處的GraphDatabaseConfiguration。（GraphDatabaseConfiguration.java:1320）com處com.thinkaurelius.titan.core.TitanFactory.open（TitanFactory.java:84）處的com.thinkaurelius.titan.core.TitanFactory.open（TitanFactory.java:94） thinkaurelius.titan.core.TitanFactory $ Builder.open（TitanFactory.java:139）位於com.txtstreet.bucket.TitanExample.main（TitanExample.java:59）由以下原因引起：java.lang.reflect.InvocationTargetException at sun.reflect。 sun.reflect.NativeCon上的NativeConstructorAccessorImpl.newInstance0（Native方法） com.thinkaurelius.titan上java.lang.reflect.Constructor.newInstance（Constructor.java:423）上的sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）上的structorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:62）。 .system.ConfigurationUtil.instantiate（ConfigurationUtil.java:44）... 7更多原因：com.thinkaurelius.titan.diskstorage.TemporaryBackendException：com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager的存儲后端出現臨時故障.ensureKeyspaceExists（AstyanaxStoreManager.java:572）位於com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager。（AstyanaxStoreManager.java:291）...另外12個原因：com.netflix.astyanax.connectionpool.exceptions.PoolTimeoutException ：PoolTimeoutException：[主機= 127.0.0.1（127.0.0.1）：9160，延遲= 10003（10003），嘗試= 1]在com.netflix.astyanax.connectionpool.impl.SimpleHostConnectionPool.waitForConnecti上等待連接超時 com.netflix.astyanax.connectionpool.impl.com上的（SimpleHostConnectionPool.java:231).com.netflix.astyanax.connectionpool.impl.RoundRobinExecuteWithFailover.borrowConnection(RoundRobinExecuteWithFailover.SimpleHostConnectionPool.java:198） com.netflix.astyanax.connectionpool.impl.AbstractExecuteWithFailoverImpl.tryOperation（AbstractExecuteWithFailoverImpl.java:117）com.netflix.astyanax.connectionpool.impl.AbstractHostPartitionConnectionPool.executeWithFailover（AbstractHostPartitionConnectionPool.java:352） .com.netflix.astyanax.thrift.ThriftClusterImpl.executeSchemaChangeOperation（ThriftClusterImpl.java:146）at com.netflix.astyanax.thrift.ThriftClusterImpl.internalCreateKeyspace（ThriftClusterImpl.java:321）at com.netflix.astyanax.thrift.ThriftClusterI com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager.ensureKeyspaceExists（AstyanaxStoreManager.java:567）... 13 m 礦石

Answer 1

啟用Cassandra的Thrift服務器

使用以下命令啟用節儉

nodetool enablethrift