What version of the agent are you on?

Assuming you have upgraded the client from 5.x, did you follow the details in the installation guide to redirect the collector?

Have you done the obvious things - checked agent is running (I have found in 6.1 if you reboot backup server it does not automatically restart DPA, engineering are currently investigating this), check you can telnet to DPA application server on port 9002 and from on port 3741.  Anything in logs on DPA agent?  Have you verified DPA app server is specified correctly in /opt/emc/dpa/agent/etc/dpa.config?

If you've put patch 101 it may have caused some issues if you have DataDomains, you may want to verify those are still working!

Data Domains use SNMP which use different ports but you have confirmed telnet is okay to the backup server so there should be no port issues.  What kind of link is there between the DPA server and the backup server?  Can you for example transfer data by FTP or similar without problems?  Are the servers in the same domain?

That does not necessarily follow as the DPA agent will communicate with Networker on different ports than the DPA agent itself.  But if you can communicate on 3741/9002 by telnet it should be okay unless your firewall team are blocking specific protocols on those ports.

Does your dpa.config specify IP or hostname?  Are you able to successfully resolve that hostname from the backup server?

I assume this error message:

Error sending results to https://dpaapplicationservername:9002/dpa-api/agent/94b8ff41-f784-40e5-8c16-524005a25ac3/report because the server rejected the request. The data will be discarded

Is saying a connection was established but the DPA server had a problem with it; I also believe you are having problems with all your backup servers which suggests that perhaps the problem lies on the DPA application server... 

David, the dpaagent version was also upgraded to Version: 6.1.0 build 81833

David, this is a new install and we did not perform an upgrade.

Hi David,

     I confirmed that the DPA agent is running as expected.

• Telnet from the NW server to DPA application server is fine. I am able to connect fine.
• The dpaagent logs give me mminfo timeout error and listner error "WARN    27302.6        20140226:130759      com.agent.lstnr - cSendToListener(): Error sending results to https://dpaapplicationservername:9002/dpa-api/agent/94b8ff41-f784-40e5-8c16-524005a25ac3/report because the server rejected the request. The data will be discarded:
• I confirmed that the right DPA application server is mentioned in "/opt/emc/dpa/agent/etc/dpa.config"'

I am also seeing some error message on the agentlogs as see below and have no idea what they mean.

INFO    27302.4        20140226:131033 clctr.mod.hostmonito - getFileSystems(): Unsupported or procfs type for filesystem 'mnttab' mounted at: '/zoneroot/ftwldscimw157/root/etc/mnttab'.. skipping.

INFO    27302.4        20140226:131033 clctr.mod.hostmonito - getFileSystems(): Unsupported or procfs type for filesystem 'objfs' mounted at: '/zoneroot/ftwldscimw157/root/system/object'.. skipping.

INFO    27302.4        20140226:131036 clctr.mod.hostmonito - getFileSystems(): Unsupported or procfs type for filesystem '/dev/odm' mounted at: '/dev/odm'.. skipping

PS: We have DD's configured on the DPA server and some of the reports seem to have come out well this morning. I will continue to monitor for issues?

David, I have verified there is no port issues. I confirmed this by telnet and also checked with our internal FW team.

Another interesting observation  I made:-

I used DPA AS as a proxy collector and configured it to monitor the NW servers running Solaris and guess what the "test" succeeded and the proxy servers (DPA AS) was able to gather the data. This confirms that there is absolutely no connectivity issues. The issue is only when the dpaagent installed locally on the NW server tries to collect and send data to the DPA AS.

PS: DD monitoring using SNMP works fine without any issues.

Hi TomR,

yes, we finally got the issue resolved by upgrading and applying the DPA server with a server hot patch (I don't recall the exact patch version but DPA support can help you out with that)

What version of DPA are you on currently? We am currently on DPA v6.1.1 Patch 306. This is so far the better patch version that I have seen. Also make sure your dpaagent are on v6.1.1 as well.

Let me know if you need any additional information.