I've run into this quite a bit (albeit always on 3x). It generally comes down to the render URL of the collector. I'm guessing yours looks something like http://collectorname:8090? If so can you confirm your able to telnet into 8090 on the collector from your workstation (NOT your zenoss master)?

Dpetzel,

No I'm not able to telnet into the collector on the port you indicated and on a closeer inspection I could see the port 8090 in not open on the collector.

Thanks.

hmm interesting. zenrender use to be started on 3.x... I don't know about 4.x quite yet, but I wonder if we shouldnt bring this thread to BigEgor's attention so the pack can handle this situation.

I am also having the same problem here. I am running 4.2.3. I used the distributed collector zenpack to configure my collector.

I have verified zenrender if running on both the master and collector. I can telnet both ways (from the collector to master and backward) over port 8090 and 8091. I have tried all the address listed above in the first post.

If i actually try an other render URL besides http://<zenmaster>:8091/<collector> the graps do not show up at all. With this URL i at least see the graphs but all the data points show up at NAN. If i got to that URL it says 'The image "http://<zenmaster>:8091/<collector>" cannot be diplayed because it contains errors.

If i look on the collector at /opt/zenoss/perf/Daemons/<collector>/ all of the graphs are getting updated every 5 minutes. If i take a look at the RRDs  using RRDtool they are showing values