cassandra for grover fails with no meaningful message

log_excerpt

2012-08-31T15:45:40.98224  INFO 15:45:40,980 Compacted to [/mnt/data/db/cassandra/Grover/Branches.Branches_subgraph_id_idx-hd-134-Data.db,].  12,097,232 to 11,540,283 (~95% of original) bytes for 96 keys at 4.795500MB/s.  Time: 2,295ms.2012-08-31T15:46:14.51641  INFO 15:46:14,516 GC for PS Scavenge: 236 ms for 1 collections, 1430079048 used; max is 33994833922012-08-31T15:47:03.55341  INFO 15:47:03,553 GC for PS Scavenge: 235 ms for 1 collections, 1395463120 used; max is 34038743042012-08-31T15:47:54.59539  INFO 15:47:54,595 GC for PS Scavenge: 225 ms for 1 collections, 1400291552 used; max is 34026291202012-08-31T15:48:51.84810  INFO 15:48:51,847 GC for PS Scavenge: 305 ms for 1 collections, 1383144256 used; max is 34078064642012-08-31T15:49:48.87291  INFO 15:49:48,872 GC for PS Scavenge: 261 ms for 1 collections, 1401799744 used; max is 34064302082012-08-31T15:50:34.89669  INFO 15:50:34,896 GC for PS Scavenge: 227 ms for 1 collections, 1421621232 used; max is 3412983808
2012-08-31T15:51:27.92456  INFO 15:51:27,924 GC for PS Scavenge: 306 ms for 1 collections, 1385242840 used; max is 3410034688
2012-08-31T15:52:21.17820  INFO 15:52:21,177 GC for PS Scavenge: 275 ms for 1 collections, 1375061648 used; max is 3412328448
2012-08-31T15:53:15.19214  INFO 15:53:15,191 GC for PS Scavenge: 247 ms for 1 collections, 1401510280 used; max is 3412787200
2012-08-31T15:54:14.21542  INFO 15:54:14,215 GC for PS Scavenge: 215 ms for 1 collections, 1391446160 used; max is 3410821120
2012-08-31T16:07:21.74768  INFO 16:07:21,747 Saved Haag-StudentEvents-KeyCache (87602 items) in 88 ms
2012-08-31T16:07:27.14182  INFO 16:07:27,141 Saved Grover-Branches-KeyCache (200000 items) in 234 ms
2012-08-31T16:10:18.01821  INFO 16:10:18,018 Stop listening to thrift clients
2012-08-31T16:10:18.02651  INFO 16:10:18,026 Waiting for messaging service to quiesce
2012-08-31T16:10:18.03859  INFO 16:10:18,036 MessagingService shutting down server thread.
2012-08-31T16:10:20.27334 
2012-08-31T16:10:21.66025  INFO 16:10:21,659 Calling URL API: http://127.0.0.1:8080/Priam/REST/v1/cassconfig/get_token returns: 850705917302346158658436
51859750628463
2012-08-31T16:10:21.97965  INFO 16:10:21,979 Calling URL API: http://127.0.0.1:8080/Priam/REST/v1/cassconfig/get_seeds returns: ec2-23-20-189-122.comput
e-1.amazonaws.com,ec2-23-20-82-87.compute-1.amazonaws.com,ec2-184-72-155-121.compute-1.amazonaws.com
2012-08-31T16:10:21.99502  INFO 16:10:21,994 Calling URL API: http://127.0.0.1:8080/Priam/REST/v1/cassconfig/is_replace_token returns: true
2012-08-31T16:10:21.99547  INFO 16:10:21,995 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_30
2012-08-31T16:10:21.99636  INFO 16:10:21,996 Heap size: 3376414720/3376414720
2012-08-31T16:10:21.99659  INFO 16:10:21,996 Classpath: /etc/cassandra:/usr/share/cassandra/lib:/usr/share/cassandra/apache-cassandra.jar:/usr/share/cas
sandra/lib/antlr-3.2.jar:/usr/share/cassandra/lib/avro-1.4.0-fixes.jar:/usr/share/cassandra/lib/avro-1.4.0-sources-fixes.jar:/usr/share/cassandra/lib/co
mmons-cli-1.1.jar:/usr/share/cassandra/lib/commons-codec-1.2.jar:/usr/share/cassandra/lib/commons-lang-2.4.jar:/usr/share/cassandra/lib/compress-lzf-0.8
.4.jar:/usr/share/cassandra/lib/concurrentlinkedhashmap-lru-1.2.jar:/usr/share/cassandra/lib/guava-r08.jar:/usr/share/cassandra/lib/high-scale-lib-1.1.2