cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From David Comer <>
Subject RE: OpsCenter datastax-agent 300% CPU
Date Mon, 20 Jul 2015 15:02:04 GMT
May I please be discontinued from this email? 


May I unsubscribe? 



From: John Wong [] 
Sent: Monday, July 20, 2015 8:37 AM
Subject: Re: OpsCenter datastax-agent 300% CPU


Hi all & Sebastain

We recently encountered similar issue. At least we observed agent constantly died with OOM.
Unfortunately, we are still with 1.2.X and it will be a while before we can totally move to
Cassandra 2 series.

Is there a backport patch to fix OOM in OpsCenter 5.1 branch? Please let us know because losing
OpsCenter is a huge deal for administrator.

Thank you.


On Wed, Jul 15, 2015 at 6:28 PM, Mikhail Strebkov < <>
> wrote:

Thanks, I think it got resolved after an update.


Kind regards,



On Wed, Jul 15, 2015 at 2:04 PM, Sebastian Estevez < <>
> wrote:

OpsCenter 5.2 has a couple of fixes that may result in the symptoms you described: <>


*         Fixed issues with agent OOM when storing metrics for large numbers of tables. (OPSC-5934

*         Improved handling of metrics overflow queue on agent. (OPSC-4618)


It's also got a lot of other great new features --


Let us know if this stops once you upgrade.

All the best,



Sebastián Estévez

Solutions Architect | 954 905 8615 <tel:954%20905%208615>  |

 <>  <>
 <>  <>  <>



DataStax is the fastest, most scalable distributed database technology, delivering Apache
Cassandra to the world’s most innovative enterprises. Datastax is built to be agile, always-on,
and predictably scalable to any size. With more than 500 customers in 45 countries, DataStax
is the database technology and transactional backbone of choice for the worlds most innovative
companies such as Netflix, Adobe, Intuit, and eBay. 


On Tue, Jul 14, 2015 at 4:40 PM, Mikhail Strebkov < <>
> wrote:

Looks like it dies with OOM:


On Tue, Jul 14, 2015 at 12:01 PM, Mikhail Strebkov < <>
> wrote:

OpsCenter 5.1.3 and datastax-agent-5.1.3-standalone.jar


On Tue, Jul 14, 2015 at 12:00 PM, Sebastian Estevez < <>
> wrote:

What version of the agents and what version of OpsCenter are you running?

I recently saw something like this and upgrading to matching versions fixed the issue.

On Jul 14, 2015 2:58 PM, "Mikhail Strebkov" < <>
> wrote:

Hi everyone,


Recently I've noticed that most of the nodes have OpsCenter agents running at 300% CPU. Each
node has 4 cores, so agents are using 75% of total available CPU.


We're running 5 nodes with OpenSource Cassandra 2.1.8 in AWS using Community AMI. OpsCenter
version is 5.1.3. We're using Oracle Java version 1.8.0_45.



31501 cassandr  20   0 3599m 296m  14m S  339  2.0  48:20.39 /opt/jdk/jdk1.8.0_45/bin/java
-Xmx128M -Dopscenter.ssl.trustStore=/var/lib/datastax-agent/ssl/agentKeyStore
-Dopscenter.ssl.keyStore=/var/lib/datastax-agent/ssl/agentKeyStore -Dopscenter.ssl.keyStorePassword=opscenter
-Dagent-pidfile=/var/run/datastax-agent/ -Dlog4j.configuration=file:/etc/datastax-agent/ -jar datastax-agent-5.1.3-standalone.jar


The logs from the agent looks strange to me:


The cluster itself seems to be fine, the load is small, nothing bad in Cassandra system.log.


Does anyone know what to tune to bring it back to normal?









View raw message