Another dumb question about something I saw in the history log

Anybody know why there would be a steady stream of QJVAEXEC jobs starting and ending in a split second, under my user profile, starting and ending in pairs at intervals of about two minutes and one second, e.g.

Job 560126/<censored>/QJVAEXEC started on 07/10/15 at 14:11:50 in subsystem QBASE
Job 560126/<censored>/QJVAEXEC ended on 07/10/15 at 14:11:50; .013 seconds used;
Job 560130/<censored>/QJVAEXEC started on 07/10/15 at 14:11:50 in subsystem QBASE
Job 560130/<censored>/QJVAEXEC ended on 07/10/15 at 14:11:51; .013 seconds used;
Job 560134/<censored>/QJVAEXEC started on 07/10/15 at 14:13:51 in subsystem QBASE
Job 560134/<censored>/QJVAEXEC ended on 07/10/15 at 14:13:51; .013 seconds used;
Job 560138/<censored>/QJVAEXEC started on 07/10/15 at 14:13:51 in subsystem QBASE
Job 560138/<censored>/QJVAEXEC ended on 07/10/15 at 14:13:52; .013 seconds used;

???

At present, other than my terminal sessions, I've got the CATALINA and QP0ZSPWT jobs of a Tomcat server running under my own user profile, and also a WSERVICE job (that's IWS, right?).

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JHHL