MySQL-Cluster SQL node will not come back up in upgrade from 7.1.18 to 7.2.4

during_startup.txt

root      7735  5419  0 15:58 pts/0    00:00:00 sudo service mysql start
root      7736  7735  0 15:58 pts/0    00:00:00 /bin/sh /sbin/service mysql start
root      7741  7736  0 15:58 pts/0    00:00:00 /bin/sh /etc/init.d/mysql start
root      7747  7741  0 15:58 pts/0    00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/sql2.office.sazze.com.pid
mysql     8031  7747 12 15:58 pts/0    00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/sql2.office.sazze.com.err --pid-file=/var/lib/mysql/sql2.office.sazze.com.pid --port=3306

ndb_1_cluster.log

2012-02-21 15:51:52 [MgmtSrvr] INFO     -- Nodeid 4 allocated for API at 10.1.1.27
2012-02-21 15:51:52 [MgmtSrvr] INFO     -- Node 4: mysqld --server-id=0
2012-02-21 15:51:53 [MgmtSrvr] INFO     -- Node 2: Node 4 Connected
2012-02-21 15:51:53 [MgmtSrvr] INFO     -- Node 3: Node 4 Connected
2012-02-21 15:51:53 [MgmtSrvr] INFO     -- Node 2: Node 4: API mysql-5.5.19 ndb-7.2.4
2012-02-21 15:51:53 [MgmtSrvr] INFO     -- Node 3: Node 4: API mysql-5.5.19 ndb-7.2.4
2012-02-21 15:51:54 [MgmtSrvr] ALERT    -- Node 2: Node 4 Disconnected
2012-02-21 15:51:54 [MgmtSrvr] INFO     -- Node 3: Communication to Node 4 closed
2012-02-21 15:51:54 [MgmtSrvr] INFO     -- Node 2: Communication to Node 4 closed
2012-02-21 15:51:54 [MgmtSrvr] ALERT    -- Node 3: Node 4 Disconnected
2012-02-21 15:51:57 [MgmtSrvr] INFO     -- Node 3: Communication to Node 4 opened
2012-02-21 15:51:57 [MgmtSrvr] INFO     -- Node 2: Communication to Node 4 opened

sql2.office.example.com.err

#
# Shutting down 7.1.18
#
120221 14:25:36 [Note] /usr/sbin/mysqld: Normal shutdown
120221 14:25:36 [Note] Event Scheduler: Purging the queue. 0 events
120221 14:25:36 [Note] Stopping Cluster Utility thread
120221 14:25:36 [Note] Stopping Cluster Index Stats thread
120221 14:25:36 [Note] Stopping Cluster Binlog
120221 14:25:36 [Note] Stopping Cluster Index Statistics thread
120221 14:25:37  InnoDB: Starting shutdown...
120221 14:25:38  InnoDB: Shutdown completed; log sequence number 0 44243
120221 14:25:38 [Note] /usr/sbin/mysqld: Shutdown complete
120221 14:25:38 mysqld_safe mysqld from pid file /var/lib/mysql/sql2.office.example.com.pid ended

#
# Starting up 7.2.4
#
120221 14:28:39 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
120221 14:28:40 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead.
120221 14:28:40 [Note] Plugin 'FEDERATED' is disabled.
120221 14:28:40 InnoDB: The InnoDB memory heap is disabled
120221 14:28:40 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120221 14:28:40 InnoDB: Compressed tables use zlib 1.2.3
120221 14:28:40 InnoDB: Using Linux native AIO
120221 14:28:40 InnoDB: Initializing buffer pool, size = 128.0M
120221 14:28:40 InnoDB: Completed initialization of buffer pool
120221 14:28:40 InnoDB: highest supported file format is Barracuda.
InnoDB: 127 rollback segment(s) active.
120221 14:28:41  InnoDB: Waiting for the background threads to start
120221 14:28:42 InnoDB: 1.1.8 started; log sequence number 44243
120221 14:28:42 [Note] NDB: NodeID is 4, management server '10.1.1.26:1186'
120221 14:28:43 [Note] NDB[0]: NodeID: 4, all storage nodes connected
120221 14:28:43 [Warning] NDB: server id set to zero - changes logged to bin log with server id zero will be logged with another server id by slave mysqlds
120221 14:28:43 [Note] Starting Cluster Binlog Thread
120221 14:28:46 mysqld_safe mysqld from pid file /var/lib/mysql/sql2.office.example.com.pid ended
#
# Startup failed.
#

#
# Trying again.
#
120221 14:30:54 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
120221 14:30:54 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead.
120221 14:30:54 [Note] Plugin 'FEDERATED' is disabled.
120221 14:30:54 InnoDB: The InnoDB memory heap is disabled
120221 14:30:54 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120221 14:30:54 InnoDB: Compressed tables use zlib 1.2.3
120221 14:30:54 InnoDB: Using Linux native AIO
120221 14:30:54 InnoDB: Initializing buffer pool, size = 128.0M
120221 14:30:54 InnoDB: Completed initialization of buffer pool
120221 14:30:54 InnoDB: highest supported file format is Barracuda.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
120221 14:30:54  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
120221 14:30:55  InnoDB: Waiting for the background threads to start
120221 14:30:56 InnoDB: 1.1.8 started; log sequence number 1589349
120221 14:30:56 [Note] NDB: NodeID is 4, management server '10.1.1.26:1186'
120221 14:30:56 [Note] NDB[0]: NodeID: 4, all storage nodes connected
120221 14:30:56 [Warning] NDB: server id set to zero - changes logged to bin log with server id zero will be logged with another server id by slave mysqlds
120221 14:30:56 [Note] Starting Cluster Binlog Thread
120221 14:30:58 mysqld_safe mysqld from pid file /var/lib/mysql/sql2.office.example.com.pid ended

The management and data nodes have already been successfully upgraded.
The SQL node is giving me trouble, though...