PV may not exist but i can watch the data by using "caget"

[RuizheIsaf]

hi everone, There are some PV that i cannot archive in EPICS AA, some details are shown in the figure, i check the network works well, and i can watch the data by using "caget"... could you give me some help to find what happen? thanks a lot Ruizhe

[aawdls]

• Can you caget the PV from the archiver appliance machine? In the screenshot it looks like you may be on a different machine when doing e.g. cainfo.
• Are the IOC and the archiver appliance on the same network?
• Are the EPICS_CA_ADDR_LIST and similar variables set correctly on the archiver host?
• Can the archiver connect to other PVs on the same host and/or network?
• Is the timestamp of the PV in the IOC correct?

[RuizheIsaf]

@aawdls thanks for your reply

1. Yes, i can caget these PV(BL:SP:Ang and BL:SP:Line:Y) from machine 192.168.20.128 which is ip address of an appliance of my epics AA cluster.
2. No, these two IOC are in the network 192.168.30.10, and my epics AA cluster has two appliances(192.168.20.128 and 192.168.20.130), but i have set the network of cluster, in 192.168.20.128, i can caget and ping these two PV...
3. EPICS_CA_ADDR_LIST = localhost EPICS_CA_AUTO_ADDR_LIST = YES EPICS_CA_MAX_ARRAY_BYTES = 16384 two appliances have the same configuration like that.
4. Yes, actually i have archived hundreds of PV, but these IOC are all in the network 192.168.20.. these two PV are in the net work 192.168.30.
5. Actually i am not good at writing db files, but i think the timestamp of IOC should be right, because they are used for many months, if necessary i will check with my colleague. thanks a lot Ruizhe

[Guillaume-CESI]

Hi, You may want to add the IP address 192.168.30. to the EPICS_CA_AUTO_ADDR_LIST : export EPICS_CA_ADDR_LIST="127.0.0.1 192.168.30.XXX"

You should add this command to the starting script of your EPICS Archiver Appliance, it may do the trick.

Sincerely, Guillaume

[RuizheIsaf]

@Guillaume-CESI Hi, yes, you are right, because i didn't write these IOCs... when i checked EPICS_CA_ADDR_LIST, there were too many IOCs which were not at port 5064... thanks a lot for your help~ Ruizhe