Github user dkuppitz commented on the issue:
https://github.com/apache/tinkerpop/pull/468
`docker/build.sh -t -i -n` fails for me with:
```
Tests run: 490, Failures: 0, Errors: 1, Skipped: 54, Time elapsed: 32.5 sec
<<< FAILURE! - in
org.apache.tinkerpop.gremlin.groovy.jsr223.RemoteGraphGroovyTranslatorProcessStandardTest
g_V_repeatXunionXoutXknowsX_groupXaX_byXageX__outXcreatedX_groupXbX_byXnameX_byXcountXX_groupXaX_byXnameXX_timesX2X_capXa_bX(org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.GroupTest$Traversals)
Time elapsed: 0.181 sec <<< ERROR!
java.lang.NullPointerException: null
at
org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest.checkSideEffects(AbstractGremlinProcessTest.java:99)
at
org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.GroupTest.g_V_repeatXunionXoutXknowsX_groupXaX_byXageX__outXcreatedX_groupXbX_byXnameX_byXcountXX_groupXaX_byXnameXX_timesX2X_capXa_bX(GroupTest.java:360)
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)
...
```
I restarted it, but a second attempt usually only "fixes" performance
related issues.
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