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03-29-2017
03:07 AM
@Ambud Sharma we are testing this change and will accept once we are done. I am still not 100% convinced that this solves the problem since the Storm documentation says BasicBolt does the acking and anchoring http://storm.apache.org/releases/1.0.1/Guaranteeing-message-processing.html Search for BasicBolt in that link and you will find "Storm has an interface called BasicBolt that encapsulates this pattern for you."
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03-22-2017
07:00 PM
This is what was mentioned in Storm Applied book "The beauty of using BaseBasicBolt as our base class is that it automatically provides anchoring and acking for us." and we are using BaseBasicBolt. Are you saying that this is incorrect?
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03-22-2017
03:40 PM
@Ambud Sharma wondering if u have more insight. Let me know if you need more details. TIA
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03-21-2017
03:21 PM
@Ambud SharmaYes. There is a case where the message from Bolt 2 doesn't get written but from bolt3 should get written. But if Bolt2 output is written, Bolt 3 output should always be there. vice versa is not true. Is that a problem? We are not anchoring tuples. We are extending BaseBasicBolt and from I understand we need to anchor tuples only if we extend BaseRichBolt..Is that incorrect? No, we are not doing any microbatching.
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03-17-2017
11:43 AM
Hi all..We are noticing that there are some messages
which get lost during storm processing..below is a brief outline of our
pipeline. We have messages coming to Kafka which then get consumed by 2
different kafka spouts in Storm. One Spout writes the message to raw
stream and other storm starts processing the message. We need to store
the output of Bolt2 to HDFS and also send it down for further processing
which will then eventually end up in ADLS as well. All the 3 HDFS bolts are configured to write to different folder
structures in ADLS. In an ideal scenario I should see all the 3 messages
in ADLS ( raw, out of bolt2 and output of bolt3). But we are noticing
that raw gets written always but sometimes only one of the output (bolt2
or bolt3) gets written to ADLS. Its inconsistent on which one misses.
Sometimes both get written. There aren't any errors/exceptions in log messages. Did anyone run into such issues? Any insight will be appreciated. Are there any good monitoring tools other than Storm UI that gives insight into what is going on? We
are using HDInsight and are hosted on Azure and are using Storm 1.0.1 Thanks.
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