Janusgraph 连接到删除服务器无法实例化 CQLStoreManager 的实现
Janusgraph connect to remove server cannot instantiate implementation of CQLStoreManager
我是 运行 ec2 上的 cassandara 集群，janusgraph 节点也是另一个 ec2 实例。我有 janus graph(janusgraph.properties)
的这些属性文件
storage.backend = cassandra
storage.hostname = [xxx.xx.xx.xx] #its valid ip and is correct, just hidden
我做的是 gremlin coonsole
graph = JanusGraphFactory.open('janusgraph.properties')
似乎无法与 cassandra 连接，错误是
Could not instantiate implementation:
org.janusgraph.diskstorage.cql.CQLStoreManager
看不懂
详细错误是：
java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cql.CQLStoreManager at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:64) at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:440) at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:411) at org.janusgraph.graphdb.configuration.builder.GraphDatabaseConfigurationBuilder.build(GraphDatabaseConfigurationBuilder.java:50) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:161) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:132) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:79) at org.janusgraph.core.JanusGraphFactory$open.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127) at groovysh_evaluate.run(groovysh_evaluate:3) at groovysh_evaluate$run.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at groovysh_evaluate$run.call(Unknown Source) at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:77) at org.codehaus.groovy.tools.shell.Evaluator$evaluate.call(Unknown Source) at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:199) at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.super$execute(GremlinGroovysh.groovy) at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:101) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144) at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:72) at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:120) at org.codehaus.groovy.tools.shell.Shell$leftShift.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127) at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:93) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$work(InteractiveShellRunner.groovy) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:101) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:164) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:138) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.runtime.callsite.PlainObjectMetaMethodSite.doInvoke(PlainObjectMetaMethodSite.java:43) at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:190) at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:58) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:156) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:160) at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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:101) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:164) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:97) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234) at org.apache.tinkerpop.gremlin.console.Console.<init>(Console.groovy:153) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234) at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:466) 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:423) at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:58) ... 69 more Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: []:9042 (com.datastax.driver.core.exceptions.TransportException: [[]:9042] Cannot connect)) at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:268) at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:107) at com.datastax.driver.core.Cluster$Manager.negotiateProtocolVersionAndConnect(Cluster.java:1652) at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1571) at com.datastax.driver.core.Cluster.init(Cluster.java:208) at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:376) at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:355) at com.datastax.driver.core.Cluster.connect(Cluster.java:305) at org.janusgraph.diskstorage.cql.CQLStoreManager.initializeSession(CQLStoreManager.java:302) at org.janusgraph.diskstorage.cql.CQLStoreManager.<init>(CQLStoreManager.java:174) ... 74 more
所以我想通了。
Janusgraph documentation 表示将其中一个节点放入集群中
storage.hostname = [一个 Cassandra-EC2 实例的 IP 地址]
因为它不是形式，我认为它是一个数组语法
用 xx.xx.xx.xx 替换 [xx.xx.xx.xx] 有效
我遇到了类似的问题，但 EC2 实例被管理员关闭，因此出现了问题。
一旦我重新启动 EC2 实例，问题就解决了。
我是 运行 ec2 上的 cassandara 集群，janusgraph 节点也是另一个 ec2 实例。我有 janus graph(janusgraph.properties)
的这些属性文件storage.backend = cassandra
storage.hostname = [xxx.xx.xx.xx] #its valid ip and is correct, just hidden
我做的是 gremlin coonsole
graph = JanusGraphFactory.open('janusgraph.properties')
似乎无法与 cassandra 连接，错误是
Could not instantiate implementation: org.janusgraph.diskstorage.cql.CQLStoreManager
看不懂
详细错误是：
java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cql.CQLStoreManager at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:64) at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:440) at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:411) at org.janusgraph.graphdb.configuration.builder.GraphDatabaseConfigurationBuilder.build(GraphDatabaseConfigurationBuilder.java:50) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:161) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:132) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:79) at org.janusgraph.core.JanusGraphFactory$open.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127) at groovysh_evaluate.run(groovysh_evaluate:3) at groovysh_evaluate$run.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at groovysh_evaluate$run.call(Unknown Source) at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:77) at org.codehaus.groovy.tools.shell.Evaluator$evaluate.call(Unknown Source) at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:199) at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.super$execute(GremlinGroovysh.groovy) at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source) 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:101) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144) at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:72) at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:120) at org.codehaus.groovy.tools.shell.Shell$leftShift.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127) at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:93) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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:101) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:164) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:138) 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.runtime.callsite.PlainObjectMetaMethodSite.doInvoke(PlainObjectMetaMethodSite.java:43) at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:190) at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:58) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:156) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:160) at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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:101) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:164) at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:97) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234) at org.apache.tinkerpop.gremlin.console.Console.<init>(Console.groovy:153) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234) at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:466) 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:423) at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:58) ... 69 more Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: []:9042 (com.datastax.driver.core.exceptions.TransportException: [[]:9042] Cannot connect)) at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:268) at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:107) at com.datastax.driver.core.Cluster$Manager.negotiateProtocolVersionAndConnect(Cluster.java:1652) at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1571) at com.datastax.driver.core.Cluster.init(Cluster.java:208) at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:376) at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:355) at com.datastax.driver.core.Cluster.connect(Cluster.java:305) at org.janusgraph.diskstorage.cql.CQLStoreManager.initializeSession(CQLStoreManager.java:302) at org.janusgraph.diskstorage.cql.CQLStoreManager.<init>(CQLStoreManager.java:174) ... 74 more
所以我想通了。
Janusgraph documentation 表示将其中一个节点放入集群中
storage.hostname = [一个 Cassandra-EC2 实例的 IP 地址]
因为它不是形式，我认为它是一个数组语法
用 xx.xx.xx.xx 替换 [xx.xx.xx.xx] 有效
我遇到了类似的问题，但 EC2 实例被管理员关闭，因此出现了问题。 一旦我重新启动 EC2 实例，问题就解决了。