It reports like this
```
Caused by: java.lang.NumberFormatException: null
    at java.lang.Integer.parseInt(Integer.java:454)
    at java.lang.Integer.parseInt(Integer.java:527)
    at edu.uci.ics.genomix.hyracks.graph.job.JobGen.initGenomixConfiguration(JobGen.java:97)
    at edu.uci.ics.genomix.hyracks.graph.job.JobGenBuildBrujinGraph.initGenomixConfiguration(JobGenBuildBrujinGraph.java:72)
    at edu.uci.ics.genomix.hyracks.graph.job.JobGen.<init>(JobGen.java:79)
```
But I checked the code they should be set properly in the test code.