When I do label-based clustering on a bag-of-tasks workflow I get this exception:

2010.07.02 08:42:33.773 PDT: [INFO] Starting Graph Traversal - DONE
2010.07.02 08:42:33.773 PDT: [DEBUG] Partition is [ID0000078, ID0000079, ID0000076, ID0000077, ID0000074, ID0000075, ID0000072, ID0000073, ID0000071, ID0000070, ID0000087, ID0000088, ID0000089, ID0000083, ID0000084, ID0000085, ID0000086, ID0000001, ID0000002, ID0000009, ID0000080, ID0000007, ID0000082, ID0000008, ID0000081, ID0000005, ID0000006, ID0000003, ID0000004, ID0000096, ID0000097, ID0000094, ID0000095, ID0000098, ID0000099, ID0000010, ID0000011, ID0000012, ID0000013, ID0000014, ID0000015, ID0000016, ID0000017, ID0000018, ID0000093, ID0000019, ID0000092, ID0000091, ID0000090, ID0000020, ID0000023, ID0000024, ID0000021, ID0000022, ID0000027, ID0000028, ID0000025, ID0000026, ID0000029, ID0000039, ID0000038, ID0000037, ID0000036, ID0000035, ID0000034, ID0000033, ID0000032, ID0000031, ID0000030, ID0000048, ID0000047, ID0000049, ID0000044, ID0000043, ID0000046, ID0000045, ID0000040, ID0000042, ID0000041, ID0000100, ID0000059, ID0000058, ID0000053, ID0000052, ID0000051, ID0000050, ID0000057, ID0000056, ID0000055, ID0000054, ID0000069, ID0000062, ID0000061, ID0000064, ID0000063, ID0000066, ID0000065, ID0000068, ID0000067, ID0000060] corresponding to label small_0
2010.07.02 08:42:33.775 PDT: [FATAL ERROR]
[1] java.lang.RuntimeException: null at org.griphyn.cPlanner.engine.MainEngine.runPlanner(MainEngine.java:213)
[2] java.lang.NullPointerException: null at org.griphyn.cPlanner.cluster.Abstract.determineClusters(Abstract.java:193)
2010.07.02 08:42:33.775 PDT: [WARNING] Non-zero exit-code 1

It looks like the mLogger instance in Abstract.java is null (the call to set it in the constructor is commented out). Horizontal.java seems to have the correct constructor, but Vertical.java does not. I get Vertical when I do label-based clustering.

To fix this in my copy I just replaced the commented line in the Abstract.java constructor with the corresponding line in the Horizontal.java constructor. I had to add an import to Abstract.java for the factory.