为什么泰坦抛出java.lang.IllegalArgumentException？

重现步骤

使用Docker v1.12.5设置环境：

在主机的shell里：

$ docker run -d --name=test.cassandra cassandra:2 # cassandra v2.2.8 $ docker build -t test . # see below for Dockerfile $ docker run -ti --rm=true -P --link test.cassandra:cassandra test bash

以下是用于构buildtest图像的Dockerfile：

 FROM openjdk:alpine ENV TITAN 'titan-1.0.0-hadoop1' # # Install system packages & Titan # RUN apk update && apk add bash unzip && rm -rf /var/cache/apk/* \ && adduser -S -s /bin/ash -D srg \ && wget -O /tmp/$TITAN.zip http://s3.thinkaurelius.com/downloads/titan/$TITAN.zip \ && unzip /tmp/$TITAN.zip -d /opt && ln -s /opt/$TITAN /opt/titan \ && rm /tmp/*.zip \ && chown -R srg /opt/$TITAN/ COPY conf/srg.properties /opt/$TITAN/conf/ # see below for file contents USER srg

最后，这里是srg.properties的内容：

 storage.backend=cassandra storage.hostname=cassandra cache.db-cache = true cache.db-cache-clean-wait = 50 cache.db-cache-time = 10000 cache.db-cache-size = 0.25

此时应该有两个容器运行：一个运行cassandra，一个运行我们的test映像。你应该在后者上运行一个bash shell

启动Gremlin并观察错误

在test容器的bash shell中：

 $ cd /opt/titan $ ./bin/gremlin.sh

这应该调出Gremlin shell。从这里：

 g = TitanFactory.open('conf/srg.properties')

这应该会产生以下错误：

 Could not instantiate implementation: com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager Display stack trace? [yN] y 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.<init>(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.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:185) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:119) at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) 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:498) 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.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215) 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:498) 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.<init>(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:423) at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:44) ... 46 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.<init>(AstyanaxStoreManager.java:291) ... 51 more Caused by: com.netflix.astyanax.connectionpool.exceptions.PoolTimeoutException: PoolTimeoutException: [host=cassandra(172.17.0.2):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) ... 52 more

问题

在很高的层面上，我的问题只是“这里发生了什么，我能做些什么？”

我有一个现在的卡桑德拉（dockerized），我希望部署泰坦。最终，我希望在运行Cassandra的每台机器上运行Titan容器，configuration为连接到位于同一位置的cassandra容器。

build议和问题是一如既往的赞赏。谢谢！

在很高的层面上，我的问题只是“这里发生了什么，我能做些什么？”

如果你看看exception的“引起”链，原来的说：

 Caused by: com.netflix.astyanax.connectionpool.exceptions.PoolTimeoutException: PoolTimeoutException: [host=cassandra(172.17.0.2):9160, latency=10000(10000), attempts=1] Timed out waiting for connection

在高层次….

发生什么事是你的Gremlin实例不能连接到Cassandra服务。最可能的解释是networking路由和/或防火墙存在问题，无论是在docker边界还是在运行内容的主机与Cassandra主机之间。

我在这种情况下要做的是：

检查正在使用的IP和端口号（每个例外）以确保它们是正确的。
使用networking诊断工具（traceroute，tcptraceroute，ping等）来确定是否可以连接到Cassandra，以及“阻塞”似乎在哪里。

你下一步做什么取决于你find的。