小贝子编程

从 gremlin 服务器获取正确数据时出现问题



我遇到了一系列荒谬的问题，这些问题让我发疯。我正在尝试完成以下几件事：

  1. 我正在尝试设置我的 gremlin 服务器以"加载"某个graphson格式的json文件，并在那里遇到非常奇怪的问题，我将详细介绍。

  2. 我正在尝试运行一个简单的 ajax 调用来查询该数据，但是 - 我不仅无法获得我想要的数据(这可能是有意义的，因为 gremlin 拒绝加载它)，我似乎正在获得一些我不知道它来自哪里的数据。

  3. 我正在尝试弄清楚如何在我的终端上测试 gremlin 服务器，但我无法运行查询，因为即使它 100% 运行并且我的 ajax 调用可以看到./gremlin-server.sh status也会返回Server not running。

格雷姆林未加载文件

要启动，我正在运行 Gremlin v.3.4.3，可以在这里找到。我用来运行 gremlin 的命令是

bin/gremlin-server.sh data/gremlin-server-rest-modern.yaml

Te yaml文件附带Gremlin服务器下载，其内容是：

#...license stuff...
host: localhost
port: 8182
scriptEvaluationTimeout: 30000
channelizer: org.apache.tinkerpop.gremlin.server.channel.HttpChannelizer
graphs: {
graph: conf/tinkergraph-empty.properties}
scriptEngines: {
gremlin-groovy: {
plugins: { org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
org.apache.tinkerpop.gremlin.tinkergraph.jsr223.TinkerGraphGremlinPlugin: {},
org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},
org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: [scripts/generate-modern.groovy]}}}}
serializers:
- { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}         # application/json
metrics: {
slf4jReporter: {enabled: true, interval: 180000}}
strictTransactionManagement: false
maxInitialLineLength: 4096
maxHeaderSize: 8192
maxChunkSize: 8192
maxContentLength: 65536
maxAccumulationBufferComponents: 1024
resultIterationBatchSize: 64

现在，据我了解，需要注意的重要事项是导致properties文件的组件graph。我正在加载的属性文件是tinkergraph-empty.properties，其内容是：

gremlin.graph=org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph
gremlin.tinkergraph.vertexIdManager=LONG

文件名，tinkergraph-empty，暗示了一些重要的事情：gremlin 服务器不会加载图形。很酷 - 当我启动 gremlin 服务器时，它会正常加载，并显示我可以期待的结果：

[INFO] GremlinServer - Configuring Gremlin Server from ./conf/gremlin-server-rest-modern.yaml
[INFO] MetricManager - Configured Metrics Slf4jReporter configured with interval=180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics
[INFO] DefaultGraphManager - Graph [graph] was successfully configured via [conf/tinkergraph-empty.properties].
[INFO] ServerGremlinExecutor - Initialized Gremlin thread pool.  Threads in pool named with pattern gremlin-*
[INFO] ServerGremlinExecutor - Initialized GremlinExecutor and preparing GremlinScriptEngines instances.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/Users/<user>/apache-tinkerpop-gremlin-server-3.4.3/lib/groovy-2.5.7-indy.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[INFO] ServerGremlinExecutor - Initialized gremlin-groovy GremlinScriptEngine and registered metrics
[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:0 edges:0], standard]
[INFO] OpLoader - Adding the standard OpProcessor.
[INFO] OpLoader - Adding the session OpProcessor.
[INFO] OpLoader - Adding the traversal OpProcessor.
[INFO] TraversalOpProcessor - Initialized cache for TraversalOpProcessor with size 1000 and expiration time of 600000 ms
[INFO] GremlinServer - Executing start up LifeCycleHook
[INFO] Logger$info - Loading 'modern' graph data.
[INFO] AbstractChannelizer - Configured application/vnd.gremlin-v3.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
[INFO] AbstractChannelizer - Configured application/json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
[INFO] GremlinServer$1 - Gremlin Server configured with worker thread pool of 1, gremlin pool of 8 and boss thread pool of 1.
[INFO] GremlinServer$1 - Channel started at port 8182.

具体来说，这条线很有希望：[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:0 edges:0], standard]

它"加载"的图形(我假设它必须初始化图形)的顶点和边为零。

当我运行我的ajax调用时，正如我所承诺的那样，我稍后会进入，我成功地将POST到服务器。它已启动并运行。一切都很好。

然而。。。

当我更改tinkerpop-empty.properties文件夹以加载图形时，事情变得非常奇怪。我将这样更改它：

gremlin.graph=org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph
gremlin.tinkergraph.vertexIdManager=LONG
gremlin.tinkergraph.graphLocation=data/tinkerpop-crew.json
gremlin.tinkergraph.graphFormat=graphson

我现在加载了一个名为tinkerpop-crew.json的数据文件夹并添加了graphFormat: graphson。这应该是正确的。可以在此处找到 JSON 文件，属性文件遵循此文件的格式。

现在，当我运行这个时，我得到一个非常不同的结果：

[INFO] GremlinServer - Configuring Gremlin Server from ./conf/gremlin-server-rest-modern.yaml
[INFO] MetricManager - Configured Metrics Slf4jReporter configured with interval=180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics
[INFO] DefaultGraphManager - Graph [graph] was successfully configured via [conf/tinkergraph-empty.properties].
[INFO] ServerGremlinExecutor - Initialized Gremlin thread pool.  Threads in pool named with pattern gremlin-*
[INFO] ServerGremlinExecutor - Initialized GremlinExecutor and preparing GremlinScriptEngines instances.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/Users/xbbn1xn/apache-tinkerpop-gremlin-server-3.4.3/lib/groovy-2.5.7-indy.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[INFO] ServerGremlinExecutor - Initialized gremlin-groovy GremlinScriptEngine and registered metrics
[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:6 edges:14], standard]
[INFO] OpLoader - Adding the standard OpProcessor.
[INFO] OpLoader - Adding the session OpProcessor.
[INFO] OpLoader - Adding the traversal OpProcessor.
[INFO] TraversalOpProcessor - Initialized cache for TraversalOpProcessor with size 1000 and expiration time of 600000 ms
[INFO] GremlinServer - Executing start up LifeCycleHook
[INFO] Logger$info - Loading 'modern' graph data.
[ERROR] GremlinServer - Gremlin Server Error
java.lang.IllegalArgumentException: Vertex with id already exists: 1
at org.apache.tinkerpop.gremlin.structure.Graph$Exceptions.vertexWithIdAlreadyExists(Graph.java:1196)
at org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph.addVertex(TinkerGraph.java:167)
at org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerFactory.generateModern(TinkerFactory.java:90)
at org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerFactory$generateModern.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 Script1$_run_closure1.doCall(Script1.groovy:28)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:101)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:263)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1041)
at groovy.lang.Closure.call(Closure.java:405)
at org.codehaus.groovy.runtime.ConvertedMap.invokeCustom(ConvertedMap.java:54)
at org.codehaus.groovy.runtime.ConversionHandler.invoke(ConversionHandler.java:122)
at com.sun.proxy.$Proxy15.onStartUp(Unknown Source)
at org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$start$1(GremlinServer.java:154)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.apache.tinkerpop.gremlin.server.GremlinServer.start(GremlinServer.java:151)
at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.java:346)
[ERROR] GremlinServer - Gremlin Server was unable to start and will now begin shutdown: Vertex with id already exists: 1
[INFO] GremlinServer - Shutting down OpProcessor[]
[INFO] GremlinServer - Shutting down OpProcessor[session]
[INFO] GremlinServer - Shutting down OpProcessor[traversal]
[INFO] GremlinServer - Shutting down thread pools.
[INFO] GremlinServer - Executing shutdown LifeCycleHook
[INFO] GremlinServer - Closed Graph instance [graph]
[INFO] GremlinServer - Gremlin Server - shutdown complete

哼？顶点已经存在？不可能。我什至从未运行过这个文件，为什么甚至会有任何记忆？就 gremlin 而言，我什至从未加载过图表。也许它启动了一个图形并忘记从内存中删除它或其他东西，对吧？

好吧，让我们制作自己的文件，只初始化一个顶点和一些奇怪的质数，没有边。我们称之为tinkerpop-crew2.json：

{"id":{"@type":"g:Int64","@value":47284629},"label":"person"}.

可能不是黄金。无论什么。好吧，太棒了，这奏效了！

[INFO] GremlinServer - Configuring Gremlin Server from ./conf/gremlin-server-rest-modern.yaml
[INFO] MetricManager - Configured Metrics Slf4jReporter configured with interval=180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics
[INFO] DefaultGraphManager - Graph [graph] was successfully configured via [conf/tinkergraph-empty.properties].
[INFO] ServerGremlinExecutor - Initialized Gremlin thread pool.  Threads in pool named with pattern gremlin-*
[INFO] ServerGremlinExecutor - Initialized GremlinExecutor and preparing GremlinScriptEngines instances.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/Users/xbbn1xn/apache-tinkerpop-gremlin-server-3.4.3/lib/groovy-2.5.7-indy.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[INFO] ServerGremlinExecutor - Initialized gremlin-groovy GremlinScriptEngine and registered metrics
[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:1 edges:0], standard]
[INFO] OpLoader - Adding the standard OpProcessor.
[INFO] OpLoader - Adding the session OpProcessor.
[INFO] OpLoader - Adding the traversal OpProcessor.
[INFO] TraversalOpProcessor - Initialized cache for TraversalOpProcessor with size 1000 and expiration time of 600000 ms
[INFO] GremlinServer - Executing start up LifeCycleHook
[INFO] Logger$info - Loading 'modern' graph data.
[INFO] AbstractChannelizer - Configured application/vnd.gremlin-v3.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
[INFO] AbstractChannelizer - Configured application/json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
[INFO] GremlinServer$1 - Gremlin Server configured with worker thread pool of 1, gremlin pool of 8 and boss thread pool of 1.
[INFO] GremlinServer$1 - Channel started at port 8182.

注意这里：[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:1 edges:0], standard].一个顶点。

当我们配置为再次使用此文件的服务器时会发生什么？

[INFO] GremlinServer - Configuring Gremlin Server from ./conf/gremlin-server-rest-modern.yaml
[INFO] MetricManager - Configured Metrics Slf4jReporter configured with interval=180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics
[INFO] DefaultGraphManager - Graph [graph] was successfully configured via [conf/tinkergraph-empty.properties].
[INFO] ServerGremlinExecutor - Initialized Gremlin thread pool.  Threads in pool named with pattern gremlin-*
[INFO] ServerGremlinExecutor - Initialized GremlinExecutor and preparing GremlinScriptEngines instances.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/Users/xbbn1xn/apache-tinkerpop-gremlin-server-3.4.3/lib/groovy-2.5.7-indy.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[INFO] ServerGremlinExecutor - Initialized gremlin-groovy GremlinScriptEngine and registered metrics
[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:7 edges:6], standard]
[INFO] OpLoader - Adding the standard OpProcessor.
[INFO] OpLoader - Adding the session OpProcessor.
[INFO] OpLoader - Adding the traversal OpProcessor.
[INFO] TraversalOpProcessor - Initialized cache for TraversalOpProcessor with size 1000 and expiration time of 600000 ms
[INFO] GremlinServer - Executing start up LifeCycleHook
[INFO] Logger$info - Loading 'modern' graph data.
[ERROR] GremlinServer - Gremlin Server Error
java.lang.IllegalArgumentException: Vertex with id already exists: 1
at org.apache.tinkerpop.gremlin.structure.Graph$Exceptions.vertexWithIdAlreadyExists(Graph.java:1196)
at org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph.addVertex(TinkerGraph.java:167)
at org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerFactory.generateModern(TinkerFactory.java:90)
at org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerFactory$generateModern.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 Script1$_run_closure1.doCall(Script1.groovy:28)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:101)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:263)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1041)
at groovy.lang.Closure.call(Closure.java:405)
at org.codehaus.groovy.runtime.ConvertedMap.invokeCustom(ConvertedMap.java:54)
at org.codehaus.groovy.runtime.ConversionHandler.invoke(ConversionHandler.java:122)
at com.sun.proxy.$Proxy15.onStartUp(Unknown Source)
at org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$start$1(GremlinServer.java:154)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.apache.tinkerpop.gremlin.server.GremlinServer.start(GremlinServer.java:151)
at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.java:346)
[ERROR] GremlinServer - Gremlin Server was unable to start and will now begin shutdown: Vertex with id already exists: 1
[INFO] GremlinServer - Shutting down OpProcessor[]
[INFO] GremlinServer - Shutting down OpProcessor[session]
[INFO] GremlinServer - Shutting down OpProcessor[traversal]
[INFO] GremlinServer - Shutting down thread pools.
[INFO] GremlinServer - Executing shutdown LifeCycleHook
[INFO] GremlinServer - Closed Graph instance [graph]
[INFO] GremlinServer - Gremlin Server - shutdown complete

和以前一样的错误。这到底是怎么回事？还有两件事引起了我的注意：

  1. ERROR] GremlinServer - Gremlin Server Error java.lang.IllegalArgumentException: Vertex with id already exists: 1.是说只有一个顶点存在，还是存在 ID 为"1"的顶点？因为我的顶点都没有 ID。也就是说，直到...

  2. 你注意到这甚至没有加载我的文件！[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:7 edges:6], standard].我的文件没有 7 个顶点和 6 条边。它有 1 个顶点和 0 条边。这实际上看起来很可疑，就像它正在加载原始tinkerpop-crew.json文件或类似的东西，即使当我们最初加载它时，INFO 消息说：[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:6 edges:14], standard].

好吧，所以我不知道这里发生了什么。

运行我的 ajax 查询以查看发生了什么

我有一个非常简单的查询，我使用 AJAX 调用运行和发布：

$.ajax({
type: "POST",
accept: "application/json",
url: url // http://localhost:8182,
timeout: timeout // I have it set to 3500,
data: JSON.stringify({"gremlin" : q}),
success: function(data, textStatus, jqXHR){
var retrvData = data.result.data;
console.log(retrvData)
}

好的，所以有几件重要的事情。q变量是我发送到 Gremlin 服务器以返回一些数据的查询，它看起来像这样：

q = 'nodes = g.V().limit(15).toList();edges = g.V(nodes).aggregate('node').outE().as('edge').inV().where(within('node')).select('edge').toList();[nodes,edges]'

此查询实质上应返回节点和边缘的列表。现在，我想介绍三种情况：

tinkerpop-empty.properties(实际上是空的)：

第一种情况是使用未更改的 tinkerpop-empty.properties 文件。请记住，当我加载它时，我得到的输出是：

[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:0 edges:0], standard]

这意味着修补匠图中不应该有信息。我应该收到一个空列表。但是，当我运行调用时，我得到以下结果：

value: Array(2)
0: Array(7)
0: {id: 1, label: "person", type: "vertex"}
1: {id: 2, label: "person", type: "vertex"}
2: {id: 3, label: "software", type: "vertex"}
3: {id: 47284629, label: "person", type: "vertex"}
4: {id: 4, label: "person", type: "vertex"}
5: {id: 5, label: "software", type: "vertex"}
6: {id: 6, label: "person", type: "vertex"}
length: 7
__proto__: Array(0)
1: Array(6)
0: {id: 9, label: "created", inVLabel: "software", outVLabel: "person", inV: 3, …}
1: {id: 7, label: "knows", inVLabel: "person", outVLabel: "person", inV: 2, …}
2: {id: 8, label: "knows", inVLabel: "person", outVLabel: "person", inV: 4, …}
3: {id: 10, label: "created", inVLabel: "software", outVLabel: "person", inV: 5, …}
4: {id: 11, label: "created", inVLabel: "software", outVLabel: "person", inV: 3, …}
5: {id: 12, label: "created", inVLabel: "software", outVLabel: "person", inV: 3, …}
length: 6

这是开发人员控制台中的输出(来自 console.log(retrvData))。有各种各样的数据。看，节点的长度是 7，边缘是 6。听起来很耳熟？为什么 gremlin 要加载这些数据？为什么它将其发送到我的 ajax 查询？

tinkergraph-empty.properties(修改为使用tinkerpop-crew.json)

好吧，随便。让我们运行下一个properties文件。请记住，我们现在使用tinkerpop-crew.json，并将 graphFormat 设置为 graphson。

当然，我遇到了与以前相同的错误，这是java.lang.IllegalArgumentException: Vertex with id already exists: 1.我的服务器也关闭了：

[ERROR] GremlinServer - Gremlin Server was unable to start and will now begin shutdown: Vertex with id already exists: 1
[INFO] GremlinServer - Shutting down OpProcessor[]
[INFO] GremlinServer - Shutting down OpProcessor[session]
[INFO] GremlinServer - Shutting down OpProcessor[traversal]
[INFO] GremlinServer - Shutting down thread pools.
[INFO] GremlinServer - Executing shutdown LifeCycleHook
[INFO] GremlinServer - Closed Graph instance [graph]
[INFO] GremlinServer - Gremlin Server - shutdown complete

让我们转到我的 AJAX 查询，看看我们得到了什么。

当然，没什么。我的 gremlin 服务器崩溃了。似乎它可能正在加载正确的文件，因为 INFO 日志显示A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:6 edges:14], standard].我还没有验证这是正确的...没那么容易。

tinkerpop-empty.properties load tinkerpop-crew2.json

我们第一次跑tinkerpop-crew2.json，事情进展顺利。我们将 ID 更改为一些奇怪的数字，并且没有引发异常。此外，图表似乎加载了正确的东西。现在让我们再次运行它，并将 ID 更改为4724729456382。

好的，哇，我边走边打这个，看看我刚刚发现的：

{"id":{"@type":"g:Int64","@value":1},"label":"person","outE":{"created":[{"id":{"@type":"g:Int32","@value":9},"inV":{"@type":"g:Int64","@value":3},"properties":{"weight":{"@type":"g:Double","@value":0.4}}}],"knows":[{"id":{"@type":"g:Int32","@value":7},"inV":{"@type":"g:Int64","@value":2},"properties":{"weight":{"@type":"g:Double","@value":0.5}}},{"id":{"@type":"g:Int32","@value":8},"inV":{"@type":"g:Int64","@value":4},"properties":{"weight":{"@type":"g:Double","@value":1.0}}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":0},"value":"marko"}],"age":[{"id":{"@type":"g:Int64","@value":2},"value":{"@type":"g:Int32","@value":29}}]}}
{"id":{"@type":"g:Int64","@value":2},"label":"person","inE":{"knows":[{"id":{"@type":"g:Int32","@value":7},"outV":{"@type":"g:Int64","@value":1},"properties":{"weight":{"@type":"g:Double","@value":0.5}}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":3},"value":"vadas"}],"age":[{"id":{"@type":"g:Int64","@value":4},"value":{"@type":"g:Int32","@value":27}}]}}
{"id":{"@type":"g:Int64","@value":3},"label":"software","inE":{"created":[{"id":{"@type":"g:Int32","@value":9},"outV":{"@type":"g:Int64","@value":1},"properties":{"weight":{"@type":"g:Double","@value":0.4}}},{"id":{"@type":"g:Int32","@value":11},"outV":{"@type":"g:Int64","@value":4},"properties":{"weight":{"@type":"g:Double","@value":0.4}}},{"id":{"@type":"g:Int32","@value":12},"outV":{"@type":"g:Int64","@value":6},"properties":{"weight":{"@type":"g:Double","@value":0.2}}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":5},"value":"lop"}],"lang":[{"id":{"@type":"g:Int64","@value":6},"value":"java"}]}}
{"id":{"@type":"g:Int64","@value":4},"label":"person","inE":{"knows":[{"id":{"@type":"g:Int32","@value":8},"outV":{"@type":"g:Int64","@value":1},"properties":{"weight":{"@type":"g:Double","@value":1.0}}}]},"outE":{"created":[{"id":{"@type":"g:Int32","@value":10},"inV":{"@type":"g:Int64","@value":5},"properties":{"weight":{"@type":"g:Double","@value":1.0}}},{"id":{"@type":"g:Int32","@value":11},"inV":{"@type":"g:Int64","@value":3},"properties":{"weight":{"@type":"g:Double","@value":0.4}}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":7},"value":"josh"}],"age":[{"id":{"@type":"g:Int64","@value":8},"value":{"@type":"g:Int32","@value":32}}]}}
{"id":{"@type":"g:Int64","@value":5},"label":"software","inE":{"created":[{"id":{"@type":"g:Int32","@value":10},"outV":{"@type":"g:Int64","@value":4},"properties":{"weight":{"@type":"g:Double","@value":1.0}}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":9},"value":"ripple"}],"lang":[{"id":{"@type":"g:Int64","@value":10},"value":"java"}]}}
{"id":{"@type":"g:Int64","@value":6},"label":"person","outE":{"created":[{"id":{"@type":"g:Int32","@value":12},"inV":{"@type":"g:Int64","@value":3},"properties":{"weight":{"@type":"g:Double","@value":0.2}}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":11},"value":"peter"}],"age":[{"id":{"@type":"g:Int64","@value":12},"value":{"@type":"g:Int32","@value":35}}]}}
{"id":{"@type":"g:Int64","@value":47284629},"label":"person"}

这就是我tinkerpop-crew2.json的内容！这是怎么回事？为什么 gremlin-server 将信息转储到该文件？如果您看到最后一行，则它包含文件的原始内容：

{"id":{"@type":"g:Int64","@value":47284629},"label":"person"}

好吧，真的，@tinkerpop，到底是什么？

我想现在说得通了，为什么当我第二次运行文件时，它再次抛出该错误并说 id 为 1 的顶点已经存在！

搞笑的是，我跑题了！让我们删除该文件的非原始部分，然后运行它：

{"id":{"@type":"g:Int64","@value":47284629},"label":"person"}

好的，我应该期待的正确信息运行良好：[INFO] ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[tinkergraph[vertices:1 edges:0], standard].

现在，让我们运行该 AJAX 调用...

嘎！！同样的事情！！

value: Array(2)
0: Array(7)
0: {id: 1, label: "person", type: "vertex"}
1: {id: 2, label: "person", type: "vertex"}
2: {id: 3, label: "software", type: "vertex"}
3: {id: 47284629, label: "person", type: "vertex"}
4: {id: 4, label: "person", type: "vertex"}
5: {id: 5, label: "software", type: "vertex"}
6: {id: 6, label: "person", type: "vertex"}
length: 7
__proto__: Array(0)
1: Array(6)
0: {id: 9, label: "created", inVLabel: "software", outVLabel: "person", inV: 3, …}
1: {id: 7, label: "knows", inVLabel: "person", outVLabel: "person", inV: 2, …}
2: {id: 8, label: "knows", inVLabel: "person", outVLabel: "person", inV: 4, …}
3: {id: 10, label: "created", inVLabel: "software", outVLabel: "person", inV: 5, …}
4: {id: 11, label: "created", inVLabel: "software", outVLabel: "person", inV: 3, …}
5: {id: 12, label: "created", inVLabel: "software", outVLabel: "person", inV: 3, …}
length: 6

请注意节点列表的长度为 7，边缘长度为 6！例如，假设它正在加载某些内容并附加我的文件，它应该是节点长度 8 和边缘长度 7！这是怎么回事？

接受的答案

解决方案是进入scripts/generate-modern.groovy并注释掉这些行：

globals << [hook : [
onStartUp: { ctx ->
ctx.logger.info("Loading 'modern' graph data.")
org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerFactory.generateModern(graph)
}
] as LifeCycleHook]

我认为这里的事情开始出错了：

当我更改 tinkerpop-empty.properties 文件夹以加载图形时，事情变得非常奇怪。我将这样更改它：

gremlin.graph=org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph gremlin.tinkergraph.vertexIdManager=LONG gremlin.tinkergraph.graphLocation=data/tinkerpop-crew.json gremlin.tinkergraph.graphFormat=graphson

您收到错误是因为您错过了 Gremlin 服务器初始化脚本正在运行的事实 - 您的 yaml 中的这一行：

https://github.com/apache/tinkerpop/blob/3.4.3/gremlin-server/conf/gremlin-server-rest-modern.yaml

因此，这是尝试将"现代"图加载到您尝试指定为"船员"图的图中(或者相反，我不记得哪个先加载，但我认为我做对了)。解决方案是：

  1. 注释掉在scripts/generate-modern.groovy中加载"现代"图形的行，并将属性文件保持原样
    2. 或
  2. 将scripts/generate-modern.groovy初始化脚本更改为仅加载"船员"数据，并保持属性文件不变以具有空图形。

你有一长串看起来很奇怪的其他赔率/结局，但我想知道其中有多少源于丢失 init 文件以及它在"背后"对你做了什么。这些知识是否有助于解决您的所有问题？如果没有，请让我知道还有什么问题，我可以尝试帮助解决它。

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