Symptoms
Data Domain data collection is failing with Timeout from worker process.
You have ran through the procedures in KB #469556, Data Domain SNMP status request consistently fails with timeout error, increasing the timeout to 2100 and the agent timeout to 21600 and this is still happening.
Cause
The cause of this issue is not known at this time.
In one instance it was found that the SNMP trap host was set to port 163. DPA connects with port 161, so in this case DPA was attempting to connect to port 161 which was not listening for SNMP on the Data Domain.
Resolution
To test for this issue run the following command on the Data Domain to check for the port used:
snmp show config
You will get an output like below:
snmp show config
General Configuration
---------------------
SNMP v2c Configuration
----------------------
Community Access Hosts
--------- --------- -----
avamar read-only *
--------- --------- -----
Trap Host Port Community
------------------------------- ---- ---------
dd-test-server.lab.com 163 avamar
192.xxx.x.xx 163 avamar
------------------------------- ---- ---------
SNMP v3 Configuration
---------------------
User Access Authentication Protocol Privacy Protocol
---- ------ ----------------------- ----------------
---- ------ ----------------------- ----------------
Trap Host Port User
--------- ---- ----
--------- ---- ----
In the above you can see that the community string "avamar" is set to 2 trap hosts and both are using port 163, and there are no community strings or trap hosts set to port 161.
To resolve this issue you can set up a new community string and set the trap host (you can use the same host) to port 161 for that community string with the following commands.
snmp add ro-community dpa
snmp add trap-host dd-test-server.lab.com:161 community dpa version v2c
Then run snmp show config and you will get an output like below:
snmp show config
General Configuration
---------------------
SNMP v2c Configuration
----------------------
Community Access Hosts
--------- --------- -----
avamar read-only *
dpa read-only
--------- --------- -----
Trap Host Port Community
------------------------------- ---- ---------
dd-test-server.lab.com 163 avamar
192.xxx.x.xx 163 avamar
dd-test-server.lab.com 161 dpa
------------------------------- ---- ---------
SNMP v3 Configuration
---------------------
User Access Authentication Protocol Privacy Protocol
---- ------ ----------------------- ----------------
---- ------ ----------------------- ----------------
Trap Host Port User
--------- ---- ----
--------- ---- ----
Please contact EMC Technical Support for further details or information.