I can vouch for @xumingming's approach. Changing line 142 to this:

```python
jvmopts=[' '.join(filter(None, [JAR_JVM_OPTS, "-Dstorm.jar=" + jarfile]))])
```
Fixed the issue for me.

I'd prefer to have @roadkill001 amend the pull request and merge that, since @roadkill001 first discovered it and got the ball rolling for a fix.

But if we feel it's urgent I can add a new pull request so we wouldn't have to wait for a CLA.