gnome-shell-pomodoro seems to suffer from the same problem as
indicator-multiload does thus flooding the log with lots of messages. See LP #1739468
Pomodoro also ships with an extension that integrates better with Gnome Shell, unfortunately I couldn't find an option to disable the Ayatana indicator since there will be two pomodoro indicators when the shell extension is enabled.
I disabled the ayatana indicator with:
mv /usr/lib/x86_64-linux-gnu/gnome-pomodoro/plugins/indicator.plugin \
/usr/lib/x86_64-linux-gnu/gnome-pomodoro/plugins/indicator.plugin-disabled
This stopped the log warnings.
Excerpt of the warnings:
Sep 11 19:23:57 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:23:57 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:23:58 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:23:58 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:23:59 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:23:59 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:00 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:00 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:01 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:01 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:02 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:02 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:03 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:03 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:04 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:04 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:05 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:05 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:06 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:06 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:07 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:07 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:08 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:08 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:09 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:09 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:10 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:10 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:11 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:11 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:12 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:12 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:13 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:13 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:14 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:14 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
Sep 11 19:24:15 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:15 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered Sep 11 19:24:16 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:16 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered Sep 11 19:24:17 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Attempting to re-register :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro; resetting instead
Sep 11 19:24:17 za25 gnome-shell[6027]: [AppIndicatorSupport-WARN] Item :1.59/org/ayatana/NotificationItem/org_gnome_Pomodoro is already registered
