Can you check on UI that the bolt is sending tuples on the metric stream? You have to click on "show system stats" on UI.

On Oct 6, 2015 2:34 PM, "Stepan Urban" <> wrote:
I tried to increase parallelism of bolts and create some performance optimizations with no effect. Metrics stop logging after few hours. Is there some mechanism that Storm stops logging when bolts are overloaded? Any other sugesstions?


2015-10-01 19:39 GMT+02:00 Stepan Urban <>:
1. All metrics are not being logged
2. Yes topology is still prgressing, everything other works as normal, worker logs are still running
3. Bolt is slower, it writes data to disk, do some simple preprocessing and send them to another bolt, spout only receive it and send it to bolt.


2015-10-01 13:19 GMT+02:00 Abhishek Agarwal <>:
Please check the following -
1. Are all the metrics not being logged or is it just the custom metrics? Are the in-built system metrics being logged?
2. When the metrics are not getting logged, is the topology still progressing?
3. Is your bolt too slow compared to the spout? 

On Thu, Oct 1, 2015 at 3:14 PM, Stepan Urban <> wrote:
Hi Ahishek,
thanks for the response. Registring metrics is normal:
transient MultiCountMetric countMetric;
transient MultiReducedMetric meanMetric;

countMetric = new MultiCountMetric();
meanMetric = new MultiReducedMetric(new MeanReducer());
context.registerMetric("count", countMetric, 1);
context.registerMetric("mean", meanMetric, 1);

Config conf = new Config();
conf.registerMetricsConsumer(LoggingMetricsConsumer.class, 1);

even with default cluster.xml it stops logging on production computer.

Yesterday I found that everything work on dev computer with data loaded from file. But on production computer, when data are receided from net it stops logging after few hours. Is it possible to find if some thread is not working properly using jstack? Or any other way how to debug it?


2015-10-01 6:26 GMT+02:00 Anishek Agarwal <>:
From what i have found dont remove/add appenders in cluster.xml. not sure about why it works for a few hours and then stops. any specific way you are registering log metrics, is it possible to put some code out ?

On Tue, Sep 29, 2015 at 9:14 PM, Stepan Urban <> wrote:
I am using LoggingMetricsConsumer and MultiReducedMetric to count several metrics in Storm topology. After few hours of running it stops logging these metrics into metrics.log file without an error in any log file. Any sugestions how to find where is the problem? First I used default cluster.xml with increased size of files, now I use only ch.qos.logback.core.FileAppender with the same results. After few mb of logs it stops logging.


Abhishek Agarwal