maha created STORM-3364:
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Summary: Data is emitted by the first bolt but it is not recieved
by the second and Storm indicates neither a data loss nor timeout failure.
Key: STORM-3364
URL: https://issues.apache.org/jira/browse/STORM-3364
Project: Apache Storm
Issue Type: Bug
Environment: Big data platform
Reporter: maha
Hi Storm community,
I would like to ask a question about data loss in Storm. My Storm topology
contains 5 bolts(coded in java):
The first bolt is a converter that receives the data from the spout and do some
preliminary transformations(coded also on java), then the second bolt receives
the emitted converter data, calls a Python script and runs it. In this Python
code, we added a new function that creates new fields from the field received
from the first bolt.
When I submit the topology, +tuples are emitted without any problem from the
first bolt+ to the second but +some tuples are not received by the second
bolt+, without any failed information. {color:#205081}*After some time(15-20
min) it works perfectly*{color}.
The first bolt log is emitting the values but those values are not received by
the second bolt (nothing on the logs) without ANY error or any failed ACK.
*Question:* _*{color:#ff0000}I would like to know why it doesn't work for a
certain period when we submit the topology (directly) and after a period of
time those information start being received on the second bolt, all the data
needed is emitted from the first bolt but I can't find it in the second
one.{color}*
The timeout for failed ACK on Storm is 30 sec, Storm indicates neither a data
loss nor timeout failure.
Thank you, I will be glad to hear from you.
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