[ https://issues.apache.org/jira/browse/TINKERPOP-2353?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephen Mallette updated TINKERPOP-2353:
----------------------------------------
    Description: 
I have a kubernetes environment where gremlin server is running as a server. While shutting down gremlin-server, I see below mentioned error

{code}
20:23:08.959 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the cypher OpProcessor.
20:23:08.963 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the standard OpProcessor.
20:23:08.968 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the session OpProcessor.
20:23:09.163 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the traversal OpProcessor.
20:01:51.200 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[]
20:01:51.201 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[cypher]
20:01:51.201 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[session]
20:01:51.202 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[traversal]
20:01:51.203 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down thread pools.
20:01:51.203 [gremlin-server-shutdown] DEBUG o.a.t.gremlin.server.GremlinServer - Shutdown Gremlin thread pool.
Exception in thread "gremlin-server-shutdown" java.lang.NullPointerException
        at org.apache.tinkerpop.gremlin.server.GremlinServer.stop(GremlinServer.java:255)
        at org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$new$0(GremlinServer.java:103)
        at java.lang.Thread.run(Thread.java:748)
{code}

Steps carried out
1. server start -> *bin/gremlin-server.sh start*
2. Check whether graphs mentioned in gremlin-server.yaml have loaded properly or not
3. If failure, then stop the server by calling -> *bin/gremlin-server.sh stop*
4. Check logs5. Exit environment

  was:
I have a kubernetes environment where gremlin server is running as a server. While shutting down gremlin-server, I see below mentioned error

```
20:23:08.959 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the cypher OpProcessor.
20:23:08.963 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the standard OpProcessor.
20:23:08.968 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the session OpProcessor.
20:23:09.163 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the traversal OpProcessor.
20:01:51.200 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[]
20:01:51.201 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[cypher]
20:01:51.201 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[session]
20:01:51.202 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[traversal]
20:01:51.203 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down thread pools.
20:01:51.203 [gremlin-server-shutdown] DEBUG o.a.t.gremlin.server.GremlinServer - Shutdown Gremlin thread pool.
Exception in thread "gremlin-server-shutdown" java.lang.NullPointerException
        at org.apache.tinkerpop.gremlin.server.GremlinServer.stop(GremlinServer.java:255)
        at org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$new$0(GremlinServer.java:103)
        at java.lang.Thread.run(Thread.java:748)
```

Steps carried out
1. server start -> *bin/gremlin-server.sh start*
2. Check whether graphs mentioned in gremlin-server.yaml have loaded properly or not
3. If failure, then stop the server by calling -> *bin/gremlin-server.sh stop*
4. Check logs5. Exit environment


> Error while Shutting Down Gremlin Server
> ----------------------------------------
>
>                 Key: TINKERPOP-2353
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2353
>             Project: TinkerPop
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.4.4
>            Reporter: Sarthak Ghosh
>            Priority: Minor
>
> I have a kubernetes environment where gremlin server is running as a server. While shutting down gremlin-server, I see below mentioned error
> {code}
> 20:23:08.959 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the cypher OpProcessor.
> 20:23:08.963 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the standard OpProcessor.
> 20:23:08.968 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the session OpProcessor.
> 20:23:09.163 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.op.OpLoader - Adding the traversal OpProcessor.
> 20:01:51.200 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[]
> 20:01:51.201 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[cypher]
> 20:01:51.201 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[session]
> 20:01:51.202 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down OpProcessor[traversal]
> 20:01:51.203 [gremlin-server-shutdown] INFO  o.a.t.gremlin.server.GremlinServer - Shutting down thread pools.
> 20:01:51.203 [gremlin-server-shutdown] DEBUG o.a.t.gremlin.server.GremlinServer - Shutdown Gremlin thread pool.
> Exception in thread "gremlin-server-shutdown" java.lang.NullPointerException
>         at org.apache.tinkerpop.gremlin.server.GremlinServer.stop(GremlinServer.java:255)
>         at org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$new$0(GremlinServer.java:103)
>         at java.lang.Thread.run(Thread.java:748)
> {code}
> Steps carried out
> 1. server start -> *bin/gremlin-server.sh start*
> 2. Check whether graphs mentioned in gremlin-server.yaml have loaded properly or not
> 3. If failure, then stop the server by calling -> *bin/gremlin-server.sh stop*
> 4. Check logs5. Exit environment



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