Hi Bruce,
Thanks for posting this question on this forum. Have you tried tuning GlassFish, like the max-pool-size and expired max-wait-time for the datasource you have configured (see GlassFish domain.xml)?
For tuning, please refer to the tgz archive for a SPECvirt_sc2013 publication using similar software stack as yours.
You may also want to check your DB performance, especially for txn_log_table.