Online reorg & log full condition

I have been using the online reorg for over 2 years without any
problems. I have just encountered a log full condition after having
started the online reorg on the same table that I have been reorging
for 2 years. The reorg was running for ~2hours prior to the log full
condition. We have made no changes to this table nor to any db config
parameters. How often does the online reorg commit??? Any help would
be greatly appreciated. Thanks!!