[collectd] Java plugin - Cannot find the API class "org.collectd.api.Collectd"

[Dan Scott]

Hi,

I probably should have replied to myself a while back, but I managed to
figure this out.

Although I had installed JRE 7 and JDK 7, I had only switched my system
defaults to use JRE 7, my JAVA_HOME was still pointing at version 6.

After I used 'alternatives' to switch to JDK7, everything worked correctly.

I think that the actual error message indicating the problem was lost in
stderr because I was running collectd using an initscript.

Thanks,

Dan Scott



On 31 October 2013 13:56, Franklin, Dave <Dave.Franklin at arrisi.com> wrote:

>  A few things I can think of off the top of my head:****
>
> ** **
>
> It would be interesting to see what the log output is with DEBUG cranked
> up - it should show all the JVM args passed in before the JVM is created.
> ****
>
> Also I see you’re logged in as root - is collectd running with sufficient
> permissions? ****
>
> Can you confirm the class is actually in the jar file: jar tf
> /usr/share/collectd/java/collectd-api.jar ****
>
> ** **
>
> =D****
>
> ** **
>
> Dave Franklin****
>
> Principal Software Engineer****
>
> Arris Group, Inc. - T1-9****
>
> 900 Chelmsford Street****
>
> Lowell, MA 01851****
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> *From:* collectd-bounces at verplant.org [mailto:
> collectd-bounces at verplant.org] *On Behalf Of *Dan Scott
> *Sent:* Wednesday, September 18, 2013 9:37 AM
> *To:* collectd at verplant.org
> *Subject:* [collectd] Java plugin - Cannot find the API class
> "org.collectd.api.Collectd"****
>
> ** **
>
> Hi,****
>
> ** **
>
> I'm running collectd 5.04 on AWS:****
>
> ** **
>
> collectd-5.0.4-1.19.amzn1.x86_64****
>
> collectd-java-5.0.4-1.19.amzn1.x86_64****
>
> ** **
>
> I'm trying to get the java plugin working to monitor tomcat. I have a
> config file as follows:****
>
> ** **
>
> LoadPlugin java****
>
> ** **
>
> <Plugin "java">****
>
>         JVMARG
> "-Djava.class.path=/usr/share/collectd/java/collectd-api.jar:/usr/share/collectd/java/generic-jmx.jar"
> ****
>
> ** **
>
>         LoadPlugin "org.collectd.java.GenericJMX"****
>
>         <Plugin "GenericJMX">****
>
> # Heap memory usage****
>
> <MBean "memory-heap">****
>
>   ObjectName "java.lang:type=Memory"****
>
>   InstancePrefix "memory-heap"****
>
>   <Value>****
>
>     Type "jmx_memory"****
>
>     Table true****
>
>     Attribute "HeapMemoryUsage"****
>
>   </Value>****
>
> </MBean>****
>
> ** **
>
>     <Connection>****
>
>       Host "localhost"****
>
>       ServiceURL "service:jmx:rmi:///jndi/rmi://localhost:17264/jmxrmi"***
> *
>
>       Collect "memory_pool"****
>
>     </Connection>****
>
>     </Plugin>****
>
> </Plugin>****
>
> ** **
>
> The log file says: Cannot find the API class "org.collectd.api.Collectd".
> Please set the correct class path using 'JVMArg "-Djava.class.path=..."'**
> **
>
> ** **
>
> But as you can see, I already have this line added. The jar files exist
> and contain the correct classes:****
>
> ** **
>
> [root at localhost ~]# rpm -ql collectd-java****
>
> /etc/collectd.d/java.conf****
>
> /usr/lib64/collectd/java.so****
>
> /usr/share/collectd/java/collectd-api.jar****
>
> /usr/share/collectd/java/generic-jmx.jar****
>
> ** **
>
> Can anyone help?****
>
> ** **
>
> Thanks,****
>
> ** **
>
> Dan Scott****
>
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