问题
I am trying to connect titan-1.0.0-hadoop1 with apache-cassandra-3.2.
I am using following " titan-cassandra-myfile.properties ":
storage.cassandra-config-dir=titan-1.0.0- hadoop1/conf/cassandra/cassandra.yaml
storage.backend=cassandra
storage.hostname=localhost
When I use gremlin to execute following command:
g=TitanFactory.open("/path to titan/ titan-1.0.0-hadoop1/conf/titan-cassandra-myfile.properties");
I am getting following error:
java.lang.IllegalArgumentException: Could not instantiate implementation: com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:55) at com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass(Backend.java:473) at com.thinkaurelius.titan.diskstorage.Backend.getStorageManager(Backend.java:407) at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.(GraphDatabaseConfiguration.java:1320) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:94) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:62) at com.thinkaurelius.titan.core.TitanFactory$open.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:110) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:122) at groovysh_evaluate.run(groovysh_evaluate:3) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:69) at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:185) at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:119) at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:94) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy) 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.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1207) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:130) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:150) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:123) at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:58) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy) 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.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1207) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:130) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:150) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:82) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) at org.apache.tinkerpop.gremlin.console.Console.(Console.groovy:144) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:303) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:44) ... 42 more Caused by: com.thinkaurelius.titan.diskstorage.TemporaryBackendException: Temporary failure in storage backend at com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager.ensureKeyspaceExists(AstyanaxStoreManager.java:572) at com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager.(AstyanaxStoreManager.java:291) ... 47 more Caused by: com.netflix.astyanax.connectionpool.exceptions.PoolTimeoutException: PoolTimeoutException: [host=localhost(127.0.0.1):9160, latency=10000(10000), attempts=1]Timed out waiting for connection at com.netflix.astyanax.connectionpool.impl.SimpleHostConnectionPool.waitForConnection(SimpleHostConnectionPool.java:231) at com.netflix.astyanax.connectionpool.impl.SimpleHostConnectionPool.borrowConnection(SimpleHostConnectionPool.java:198) at com.netflix.astyanax.connectionpool.impl.RoundRobinExecuteWithFailover.borrowConnection(RoundRobinExecuteWithFailover.java:84) at com.netflix.astyanax.connectionpool.impl.AbstractExecuteWithFailoverImpl.tryOperation(AbstractExecuteWithFailoverImpl.java:117) at com.netflix.astyanax.connectionpool.impl.AbstractHostPartitionConnectionPool.executeWithFailover(AbstractHostPartitionConnectionPool.java:352) at com.netflix.astyanax.thrift.ThriftClusterImpl.executeSchemaChangeOperation(ThriftClusterImpl.java:146) at com.netflix.astyanax.thrift.ThriftClusterImpl.internalCreateKeyspace(ThriftClusterImpl.java:321) at com.netflix.astyanax.thrift.ThriftClusterImpl.addKeyspace(ThriftClusterImpl.java:294) at com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager.ensureKeyspaceExists(AstyanaxStoreManager.java:567) ... 48 more ```
When I use same configurations with apache-cassandra-1.2.5 and titan-all-0.3.1 , the above config works and it creates a graph.
Please suggest some solution on this , whether is this a compatibility issue or I am doing something wrong.
Thanks, Laxmikant
回答1:
Titan 1.0 has been released using Cassandra 2.1.9. I'm almost sure that it's not compatible with Cassandra 3.x because there was a storage engine re-write
See here: https://github.com/thinkaurelius/titan/blob/titan10/pom.xml#L65
来源：https://stackoverflow.com/questions/34846691/titan-1-0-0-hadoop1-compatibilty-issues-with-apache-cassandra-3-2