java - Apache Storm - Spout/Bolt crashing with high latency -


while using storm 1.1.0 topology faced problem, storm reschedules or let bolts , spouts crash, when topology has bolt high latency.

now created latencytest-topology testing , playing around problem.

i have spout, emit random values:

public void nexttuple() {     outputcollector.emit(new values(math.random())); }

and have bolt, recieves these values , sleeps specific time.

public void execute(tuple tuple) {     double input = tuple.getdouble(0);     try {         thread.sleep(this.latencyms);     } catch (interruptedexception e) {         e.printstacktrace();     }     outputcollector.ack(tuple); }

so if set latencyms 10, can see, storm works "fine" (just 2000 acked tuples in bolt)for 3 minutes. bolts latency goes 60-100ms instead of 10ms , storm starts "reassign" (log in nimbus) executors. statistics in ui going 0.

image 1: no crash , 2000 tuples acked high latency

image 2: crashed no information in ui

since working files in spout of real topology, not acceptable reopen these.

i played around timeout values in storm.yaml , "config.setmaxspoutpending(200);" option, nothing seems have effect. using 3 node zookeeper cluster , 5 node storm cluster test.

do have ideas how solve or understand this? need storm go on, if latency high.

maxspoutpending not timeout config, should config topology.message.timeout.


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