Events cause heartbeat errors in TangoBox

# 3 years ago
Phil	Hello Tango community, I've created a device server in TangoBox-9.3 that makes use of the Tango events+polling mechanism to publish change events to clients, which I've been testing against the AtkPanel. At first everything seemed to be working as expected, and the change events were being received by AtkPanel (according to the Atk diagnostic) every polling period. However, recently this seems to have stopped working. AtkPanel appears only to receive events every 10 seconds whereupon a "No heartbeat from dserver/…" error message appears in the Atk Error History. Only then do the attribute values in AtkPanel get updated. In my TangoBox I see the same behaviour with the TangoTest device 'sys/tg_test/1' for the few attributes that are polled, and I've also noticed it occur when testing 'sys/tg_test/1' in a freshly downloaded, unmodified, TangoBox-9.3 and TangoBox-9.2. As for what changed in my particular instance to start this behaviour, I cannot say. My device server belongs to host tangobox:10000, and the Tango Host in Jive, from where I am starting the AtkPanels, is also set to tangobox:10000. Any advice on how to debug this issue would be greatly appreciated. Thanks in advance. Phil

# 3 years ago

Hello Tango community,

I've created a device server in TangoBox-9.3 that makes use of the Tango events+polling mechanism to publish change events to clients, which I've been testing against the AtkPanel.

At first everything seemed to be working as expected, and the change events were being received by AtkPanel (according to the Atk diagnostic) every polling period. However, recently this seems to have stopped working. AtkPanel appears only to receive events every 10 seconds whereupon a "No heartbeat from dserver/…" error message appears in the Atk Error History. Only then do the attribute values in AtkPanel get updated.

In my TangoBox I see the same behaviour with the TangoTest device 'sys/tg_test/1' for the few attributes that are polled, and I've also noticed it occur when testing 'sys/tg_test/1' in a freshly downloaded, unmodified, TangoBox-9.3 and TangoBox-9.2. As for what changed in my particular instance to start this behaviour, I cannot say.

My device server belongs to host tangobox:10000, and the Tango Host in Jive, from where I am starting the AtkPanels, is also set to tangobox:10000.

Any advice on how to debug this issue would be greatly appreciated. Thanks in advance.

Phil

# 3 years ago
Reynald	Hi Phil, Similar heartbeat problems seen on the Tango Box have been reported: please see https://github.com/tango-controls/JTango/issues/89 and https://github.com/tango-controls/JTango/issues/90 These problems should be solved in JTango 9.6.6 Kind regards, Reynald Rosenberg's Law: Software is easy to make, except when you want it to do something new. Corollary: The only software that's worth making is software that does something new.

# 3 years ago

Reynald

Hi Phil,

Similar heartbeat problems seen on the Tango Box have been reported: please see https://github.com/tango-controls/JTango/issues/89 and https://github.com/tango-controls/JTango/issues/90

These problems should be solved in JTango 9.6.6

Kind regards,
Reynald

Rosenberg's Law: Software is easy to make, except when you want it to do something new.
Corollary: The only software that's worth making is software that does something new.

# 3 years ago
Phil	Hi Reynald, Thanks for such a quick response. Our development is c++ but I suppose AtkPanel relies on JTango? Would that be where the issue is coming from? All the best, Phil

# 3 years ago
Reynald	Phil Hi Reynald, Thanks for such a quick response. Our development is c++ but I suppose AtkPanel relies on JTango? Would that be where the issue is coming from? Exactly Rosenberg's Law: Software is easy to make, except when you want it to do something new. Corollary: The only software that's worth making is software that does something new.

# 3 years ago
Phil	Hi again Reynald, Just as you advised we downloaded the latest JTango jar file from https://github.com/tango-controls/JTango/releases/tag/9.6.7 and pointed /usr/local/share/java/JTango.jar to it. Events seem to be working as expected now. Thanks very much for your help. Phil