GitHub user okram opened a pull request:
https://github.com/apache/tinkerpop/pull/481
TINKERPOP-1428: profile() throws NPE for union(group, group)
https://issues.apache.org/jira/browse/TINKERPOP-1428#
`GroupSideEffectStep` is "weird" in that it splits the `valueTraversal`
into a pre- and post-traversals where the split is the first `Barrier`-step
encountered. This makes it so that its possible for a local child to never be
`next()'d` and thus, profiling never initialized for that step. The blanket fix
is basically, if a metric is not initialized, don't include it in the profile
results. As a side, I fixed a bug in `GroupXXXStep` around empty traverser set
values (basically, don't include them).
VOTE +1.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/tinkerpop TINKERPOP-1428
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tinkerpop/pull/481.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #481
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