Why do I get “Error while executing a rule—AttributeError: ‘NoneType’ object has no attribute ‘get’” when executing the below. The error triggers on cluster_name

I guess it is triggered because the cacheName attribute is not found in the file, but how do I remedy this? If the attribute exists, the code works.

Petrus Johansson - 08 March 2010 08:19 AM

Why do I get “Error while executing a rule—AttributeError: ‘NoneType’ object has no attribute ‘get’” when executing the below. The error triggers on cluster_name

cluster_cmd := discovery.fileGet(host, "/%install_root%/config/server.cnf");
    if cluster_cmd <> "" then
    log.debug("Found server.cnf file"); //Try to extract cluster and alias name
        cluster_name := regex.extract(cluster_cmd.content, regex'cacheName=(\S+)', raw'\1');
        if not cluster_name then
        log.debug("This is no cluster");
        else
        log.debug("Cluster identified as %cluster_name%");
        cluster_name := cluster_name;
            cluster_alias := regex.extract(cluster_cmd.content, regex'aliasList=(\S+)', raw'\1');
            if cluster_alias <> "" then
            cluster_alias := cluster_alias;
            end if;
        end if;
    end if; 

I guess it is triggered because the cacheName attribute is not found in the file, but how do I remedy this? If the attribute exists, the code works.

Sorry for responding to my own post… But discard this post… The server.cnf file was corrupt :)

Nevertheless, you might consider to add something like this:


cluster_cmd := discovery.fileGet(host, “/%install_root%/config/server.cnf”);
if not cluster_cmd then stop;
else <your code>
end if;


Your code doesn’t verify that cluster_cmd actually exists

Actually,

The only line in the code which wasn’t correct was:

It should be:

discovery.fileGet() returns a node, not a string