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From pradeep s <>
Subject Re: Storm Spout failure
Date Sun, 07 Aug 2016 20:06:57 GMT
Time taken in bolts is very less . Total time of all bolts will come to
less than 5 seconds only.
Do i need to override the max spout pending param.
If i process for small load, i dont see any issue.

On Sat, Aug 6, 2016 at 11:20 AM, Andrew Montalenti <>

> Most commonly this is because your downstream components are failing to
> ack your tuples. If a tuple goes unack'ed for the topology timeout period,
> then it will fail at the spout.
> To debug this, make sure you get an ack for every tuple emitted from the
> spout at every bolt processing stage. Also, you may want to double-check
> your tuple anchor'ing -- this can sometimes be caused by improperly
> anchored or unanchored tuples, as well.
> --
> Andrew Montalenti | CTO,
> On Sat, Aug 6, 2016 at 1:22 PM, pradeep s <>
> wrote:
>> Hi ,
>> I am having a topology which reads messages from Amazon SQS and and there
>> are three bolts .One bolt which writes to a RDS relational DB. Output of
>> this is sent to a S3 write bolt.After this there is a SQS delete bolt which
>> deletes the message from SQS.
>> When i am testing a bigger load, i am seeing spout failures in Storm UI.
>> But there are no failures in any of the bolts.Also no failure in log
>> files.
>> Any suggestion on the reason for spout failure and how to debug this.
>> Topology timeout is set at default 30 secs.
>> Thanks
>> Pradeep S

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