将 Datastax Cassandra 从版本 5.0 升级到 5.1 后，我们在连接到现有键空间时遇到 gremlin 错误，如下所述，虽然在图形中创建新键空间并通过 gremlin 连接没有问题。
$gremlin> :remote config alias g chat_bot.g
==>g=chat_bot.g
$gremlin> schema
1) 注入构造函数时出错，
com.datastax.bdp.gcore.datastore.DataStoreException: Failed to execute statement
at com.datastax.bdp.graph.impl.DseGraphImpl.<init>(DseGraphImpl.java:159)
at com.datastax.bdp.graph.impl.GraphModule.configure(Unknown Source) (via modules: com.datastax.bdp.graph.impl.DseGraphFactoryImpl$$Lambda$760/154747472 -> com.google.inject.util.Modules$OverrideModule -> com.datastax.bdp.graph.impl.GraphModule)
while locating com.datastax.bdp.graph.impl.DseGraphImpl
1 error
at org.apache.tinkerpop.gremlin.console.groovy.plugin.DriverRemoteAcceptor.submit(DriverRemoteAcceptor.java:172)
at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:99)
at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:122)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:95)
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:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:124)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:59)
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:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1218)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:83)
at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)
at org.apache.tinkerpop.gremlin.console.Console.<init>(Console.groovy:169)
at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)
at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:424)
尾 /var/log/cassandra/system.log
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:652) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:575) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:489) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:451) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:140) [netty-all-4.0.42.Final.jar:4.0.42.Final]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_74]
WARN [ReadStage-2] 2017-05-10 12:21:34,818 ReadCommand.java:532 - 读取 9 个活动行和 4881 个墓碑单元以进行查询 SELECT * FROM cordiant_chat.chat_onlineusers_status WHERE org_id = 2 LIMIT 5000（参见 tombstone_warn_threshold）警告 [ ReadStage-1] 2017-05-10 12:21:34,837 ReadCommand.java:532 - 读取 9 个实时行和 4881 个墓碑单元以进行查询 SELECT * FROM cordiant_chat.chat_onlineusers_status WHERE org_id = 2 LIMIT 5000（参见 tombstone_warn_threshold）root@ip- 10-10-1-36:~#
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