一、简介                                                                                                                                                                        

      运行gremlin console 连接hbase+elastricseach 测试操作titan，titan运行的环境是jdk1.8，linux环境有安装了jdk1.8.0_11环境，符合titan所需的jdk1.8环境，运行./bin/gremlin.sh 报错了，运行不起来。

二、错误                                                                                                                                                                         

[root@Master titan-1.0.0-hadoop2]# ./bin/gremlin.sh         /,,,/         (o o)-----oOOo-(3)-oOOo-----plugin activated: aurelius.titanplugin activated: tinkerpop.serverplugin activated: tinkerpop.utilitiesplugin activated: tinkerpop.tinkergraphjava.lang.VerifyError: Bad <init> method call from inside of a branchException Details:  Location:    org/codehaus/groovy/tools/shell/util/SimpleCompletor.<init>()V @59: invokespecial  Reason:    Error exists in the bytecode  Bytecode:    0000000: 04bd 0004 5903 03c5 0031 0153 5910 ff12    0000010: 02b8 0037 2a5f ab00 0000 004e 0000 0003    0000020: 0000 9b75 0000 0022 3231 c38a 0000 002b    0000030: 64df 9bb1 0000 003c 5f5a 57b7 003a a700    0000040: 305f 5a03 1231 b800 40c0 0031 b700 42a7    0000050: 001f 5f5a 5903 32ba 0049 0000 5f57 b700    0000060: 4ca7 000d bb00 4e59 1250 b700 53bf 57b1    0000070:                                          Stackmap Table:    full_frame(@56,{UninitializedThis},{Object[#57],UninitializedThis})    full_frame(@65,{UninitializedThis},{Object[#57],UninitializedThis})    full_frame(@82,{UninitializedThis},{Object[#57],UninitializedThis})    full_frame(@100,{UninitializedThis},{Object[#57],UninitializedThis})    full_frame(@110,{Object[#2]},{Object[#57]})        at java.lang.Class.getDeclaredConstructors0(Native Method)        at java.lang.Class.PRivateGetDeclaredConstructors(Class.java:2658)        at java.lang.Class.getDeclaredConstructors(Class.java:2007)        at org.codehaus.groovy.reflection.CachedClass$2$1.run(CachedClass.java:71)        at java.security.accessController.doPrivileged(Native Method)        at org.codehaus.groovy.reflection.CachedClass$2.initValue(CachedClass.java:68)        at org.codehaus.groovy.reflection.CachedClass$2.initValue(CachedClass.java:66)        at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)        at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)        at org.codehaus.groovy.reflection.CachedClass.getConstructors(CachedClass.java:265)        at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:215)        at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:225)        at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createNormalMetaClass(MetaClassRegistry.java:168)        at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createWithCustomLookup(MetaClassRegistry.java:158)        at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.create(MetaClassRegistry.java:141)        at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:250)        at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:282)        at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:255)        at org.codehaus.groovy.vmplugin.v7.Selector$InitSelector.getMetaClass(Selector.java:365)        at org.codehaus.groovy.vmplugin.v7.Selector$MethodSelector.setCallSiteTarget(Selector.java:947)        at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:211)        at org.codehaus.groovy.tools.shell.commands.HelpCommand.createCompleters(HelpCommand.groovy:45)        at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)        at org.codehaus.groovy.tools.shell.CommandSupport.getCompleter(CommandSupport.groovy:134)        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:483)        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)        at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1844)        at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:3734)        at org.codehaus.groovy.tools.shell.CommandSupport.getProperty(CommandSupport.groovy)        at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)        at org.codehaus.groovy.tools.shell.CommandsMultiCompleter.add(InteractiveShellRunner.groovy:167)        at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:74)        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)
       
三、分析                                                                                                                                                                         
     原先以为是titan的jar冲突了，排查了很久，看到了jdk1.8.0_11 的bug  只要升级最新的jdk版本1.8.0_121版本就可以正常运行起来。
    
[root@Master titan-1.0.0-hadoop2]# ./bin/gremlin.sh         /,,,/         (o o)-----oOOo-(3)-oOOo-----plugin activated: aurelius.titanplugin activated: tinkerpop.serverplugin activated: tinkerpop.utilitiesplugin activated: tinkerpop.tinkergraphgremlin> 
      接下来，开始对titan进行深入的了解，可以互相学习