Hi Check that you don't have blocking code. For example writing to DB without time-out or similar when you wait an operation to finish long or unlimited time Secondly I recomend you to use ackers ( with max spout pending parameter) this way you can control the stream... On 1 Dec 2014 05:54, "이승진" <sweetest...@navercorp.com> wrote:
> Hello all, > > > > We are running a topology which reads data from kafka and interact with > other persistent stores. > > > > incoming data into kafka is continuous and quite huge, but somtimes spout > throuput shown in storm UI becomes 0 which means entire topology hangs. > > > > this event occurs rarely and we couldn't figure out what causes this, so > it's impossible for us to reproduce at this moment. > > > > only weird thing we found so far is at that moment, load average and cpu > utilization got abnormally high. > > > > we're to monitor worker process via JMX, is there any other methodology to > analyze this problem you would recommend? > > > > > > > > Sincerely, > > > > > >
