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Posted to dev@tinkerpop.apache.org by "stephen mallette (Jira)" <ji...@apache.org> on 2019/09/11 10:57:00 UTC
[jira] [Commented] (TINKERPOP-2292) NullPointerException in
console.
[ https://issues.apache.org/jira/browse/TINKERPOP-2292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16927482#comment-16927482 ]
stephen mallette commented on TINKERPOP-2292:
---------------------------------------------
I don't see a problem here - explanations for each error below:
{code}
jesse@vader ~$ gremlin
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/home/jesse/src/apache-tinkerpop-gremlin-console-3.4.3/lib/groovy-2.5.7-indy.jar) to constructor java.lang.invoke.MethodHandles$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
{code}
I assume you are using Java 9 or later - I think it produces those warnings in relation to Groovy: https://stackoverflow.com/questions/46454995/how-to-hide-warning-illegal-reflective-access-in-java-9-without-jvm-argument
{code}
\,,,/
(o o)
-----oOOo-(3)-oOOo-----
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
plugin activated: tinkerpop.tinkergraph
gremlin> g
No such property: g for class: groovysh_evaluate
Type ':help' or ':h' for help.
Display stack trace? [yN]
gremlin> g = graph.traversal()
No such property: graph for class: groovysh_evaluate
Type ':help' or ':h' for help.
Display stack trace? [yN]graph = TinkerGraph.open()
{code}
The above errors are expected. The console session has no knowledge of those variables. They don't exist yet because you haven't created them and therefore you get errors if you try to reference them on their own.
{code}
gremlin> graph = TinkerGraph.open()
==>tinkergraph[vertices:0 edges:0]
gremlin> g = graph.traversal()
==>graphtraversalsource[tinkergraph[vertices:0 edges:0], standard]
{code}
Now that you've created them - you are able to reference "graph" and "g" - good to go.
{code}
gremlin> v1 = g.addV("person").property(id, 1).property("name", "marko").property("name", 29).next()
==>v[1]
gremlin> v1
==>v[1]
gremlin> v1.propert
properties( property(
{code}
I'm not sure why you didn't get an error above - obviously that little blob of syntax is incorrect. I would have expected something like:
{code}
gremlin> v1.propert
No such property: propert for class: org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerVertex
Type ':help' or ':h' for help.
Display stack trace? [yN]properties( property( n
{code}
but perhaps that is just an error in what you pasted in the issue??
{code}
gremlin> v1.properties()
==>vp[name->marko]
==>vp[name->29]
gremlin> v1.property('name', 'foo')
==>vp[name->foo]
gremlin> v1.properties()
==>vp[name->foo]
gremlin> v1.property(list, 'name', 'foo')
==>vp[name->foo]
gremlin> v1.properties()
==>vp[name->foo]
==>vp[name->foo]
gremlin> v1.property(list, 'name', 'foos')
==>vp[name->foos]
gremlin> v1.property(set, 'name', 'foos')
==>vp[name->foos]
gremlin> v1.property(set, 'name', 'foo')
==>vp[name->foo]
gremlin> v1.propert
properties( property(
{code}
More of the same broken code - not sure what's wrong there.
{code}
gremlin> v1.properties()
==>vp[name->foo]
==>vp[name->foo]
==>vp[name->foos]
gremlin> v1.property('name', 'foo')
==>vp[name->foo]
gremlin> v1.property(set, 'name', 'foo')
==>vp[name->foo]
gremlin> v1.properties()
==>vp[name->foo]
gremlin> v1 = g.addV("person").property(id, 1).property("name", "marko").property("age", 29).next()
Vertex with id already exists: 1
Type ':help' or ':h' for help.
Display stack trace? [yN]
{code}
Clearly an error - trying to create a new vertex with the same identifier.
{code}
gremlin> gremlin> v2 = g.addV("software").property(id, 3).property("name", "lop").property("lang", "java").next()
java.lang.NullPointerException
Type ':help' or ':h' for help.
Display stack trace? [yN]
gremlin> gremlin> v2 = g.addV("software").property(id, 3).property("name", "lop").property("lang", "java").next()
java.lang.NullPointerException
Type ':help' or ':h' for help.
Display stack trace? [yN]
gremlin> gremlin> v2 = g.addV("software").property(id, 3).property("name", "lop").property("lang", "java").next()
java.lang.NullPointerException
Type ':help' or ':h' for help.
Display stack trace? [yN]y
java.lang.NullPointerException
at java.base/java.util.concurrent.ConcurrentHashMap.replaceNode(ConcurrentHashMap.java:1111)
at java.base/java.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:1102)
at org.codehaus.groovy.runtime.memoize.UnlimitedConcurrentCache.remove(UnlimitedConcurrentCache.java:70)
at groovy.lang.GroovyClassLoader.removeClassCacheEntry(GroovyClassLoader.java:676)
at jdk.internal.reflect.GeneratedMethodAccessor33.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.codehaus.groovy.runtime.callsite.PlainObjectMetaMethodSite.doInvoke(PlainObjectMetaMethodSite.java:43)
at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:211)
at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:53)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127)
at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:98)
at org.codehaus.groovy.tools.shell.Evaluator$evaluate.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:201)
at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.super$3$execute(GremlinGroovysh.groovy)
at jdk.internal.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
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:83)
at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:120)
at org.codehaus.groovy.tools.shell.Shell$leftShift$1.call(Unknown Source)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:93)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)
at jdk.internal.reflect.GeneratedMethodAccessor64.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
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 jdk.internal.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
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.AbstractCallSite.callCurrent(AbstractCallSite.java:160)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
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:566)
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:168)
at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234)
at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:502)
gremlin>
{code}
Can't say what happened above except that every command issued to the console has a "gremlin> " prefixed to it so the syntax is invalid. I'd have expected a different error but it's invalid nonetheless. By this point, there have been so many errors it's hard to know what is triggering what problem. If there really is a bug here somewhere I think you will need to provide more information with a cleaner Gremlin Console session for us to try to solve it. Thanks.
> NullPointerException in console.
> --------------------------------
>
> Key: TINKERPOP-2292
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2292
> Project: TinkerPop
> Issue Type: Bug
> Components: console
> Affects Versions: 3.4.3
> Environment: Ubuntu 18.04
> Reporter: Jesse Brennan
> Priority: Minor
>
> I'm new to TinkerPop so it's very possible I was doing something wrong, but here is the log of what happened to produce the error.
>
> {code}
> jesse@vader ~$ gremlin
> WARNING: An illegal reflective access operation has occurred
> WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/home/jesse/src/apache-tinkerpop-gremlin-console-3.4.3/lib/groovy-2.5.7-indy.jar) to constructor java.lang.invoke.MethodHandles$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
> \,,,/
> (o o)
> -----oOOo-(3)-oOOo-----
> plugin activated: tinkerpop.server
> plugin activated: tinkerpop.utilities
> plugin activated: tinkerpop.tinkergraph
> gremlin> g
> No such property: g for class: groovysh_evaluate
> Type ':help' or ':h' for help.
> Display stack trace? [yN]
> gremlin> g = graph.traversal()
> No such property: graph for class: groovysh_evaluate
> Type ':help' or ':h' for help.
> Display stack trace? [yN]graph = TinkerGraph.open()
> gremlin> graph = TinkerGraph.open()
> ==>tinkergraph[vertices:0 edges:0]
> gremlin> g = graph.traversal()
> ==>graphtraversalsource[tinkergraph[vertices:0 edges:0], standard]
> gremlin> v1 = g.addV("person").property(id, 1).property("name", "marko").property("name", 29).next()
> ==>v[1]
> gremlin> v1
> ==>v[1]
> gremlin> v1.propert
> properties( property(
> gremlin> v1.properties()
> ==>vp[name->marko]
> ==>vp[name->29]
> gremlin> v1.property('name', 'foo')
> ==>vp[name->foo]
> gremlin> v1.properties()
> ==>vp[name->foo]
> gremlin> v1.property(list, 'name', 'foo')
> ==>vp[name->foo]
> gremlin> v1.properties()
> ==>vp[name->foo]
> ==>vp[name->foo]
> gremlin> v1.property(list, 'name', 'foos')
> ==>vp[name->foos]
> gremlin> v1.property(set, 'name', 'foos')
> ==>vp[name->foos]
> gremlin> v1.property(set, 'name', 'foo')
> ==>vp[name->foo]
> gremlin> v1.propert
> properties( property(
> gremlin> v1.properties()
> ==>vp[name->foo]
> ==>vp[name->foo]
> ==>vp[name->foos]
> gremlin> v1.property('name', 'foo')
> ==>vp[name->foo]
> gremlin> v1.property(set, 'name', 'foo')
> ==>vp[name->foo]
> gremlin> v1.properties()
> ==>vp[name->foo]
> gremlin> v1 = g.addV("person").property(id, 1).property("name", "marko").property("age", 29).next()
> Vertex with id already exists: 1
> Type ':help' or ':h' for help.
> Display stack trace? [yN]
> gremlin> gremlin> v2 = g.addV("software").property(id, 3).property("name", "lop").property("lang", "java").next()
> java.lang.NullPointerException
> Type ':help' or ':h' for help.
> Display stack trace? [yN]
> gremlin> gremlin> v2 = g.addV("software").property(id, 3).property("name", "lop").property("lang", "java").next()
> java.lang.NullPointerException
> Type ':help' or ':h' for help.
> Display stack trace? [yN]
> gremlin> gremlin> v2 = g.addV("software").property(id, 3).property("name", "lop").property("lang", "java").next()
> java.lang.NullPointerException
> Type ':help' or ':h' for help.
> Display stack trace? [yN]y
> java.lang.NullPointerException
> at java.base/java.util.concurrent.ConcurrentHashMap.replaceNode(ConcurrentHashMap.java:1111)
> at java.base/java.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:1102)
> at org.codehaus.groovy.runtime.memoize.UnlimitedConcurrentCache.remove(UnlimitedConcurrentCache.java:70)
> at groovy.lang.GroovyClassLoader.removeClassCacheEntry(GroovyClassLoader.java:676)
> at jdk.internal.reflect.GeneratedMethodAccessor33.invoke(Unknown Source)
> at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
> at org.codehaus.groovy.runtime.callsite.PlainObjectMetaMethodSite.doInvoke(PlainObjectMetaMethodSite.java:43)
> at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:211)
> at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:53)
> at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127)
> at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:98)
> at org.codehaus.groovy.tools.shell.Evaluator$evaluate.call(Unknown Source)
> at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:201)
> at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.super$3$execute(GremlinGroovysh.groovy)
> at jdk.internal.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
> at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
> 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:83)
> at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:120)
> at org.codehaus.groovy.tools.shell.Shell$leftShift$1.call(Unknown Source)
> at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:93)
> at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)
> at jdk.internal.reflect.GeneratedMethodAccessor64.invoke(Unknown Source)
> at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
> 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 jdk.internal.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
> at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
> 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.AbstractCallSite.callCurrent(AbstractCallSite.java:160)
> at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
> at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
> 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:566)
> 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:168)
> at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:234)
> at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:502)
> gremlin>
> {code}
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