Are both consumers in the same consumer group, ie, use the same `group.id`?
If yes, how many partitions does the topic have? If it has only one partition, the observed behavior is expected, because a single partitions can only be read by a single consumer instance per consumer group. The second consumer won't have any assigned partitions to read from. -Matthias On 12/9/19 11:12 PM, Frank Zhou wrote: > Hi, > > I am quite new to Kafka, and I have encountered a weird case during QA > stage for our application. Now we have 2 consumers consuming same topic > in kafka cluster. The first started consumer works fine and get closed > after getting all the messages. After that, the second one started and > just hang there in the poll(), which we set the Duration to 10 seconds, > and will quit the loop if no records are fetched. From kafka server log, > I don't see warning or error for the second consumer. > > Attached client/server log related to both consumers. I am using 2.3.1 > client, 2.2.2 kafka servers. Looking forward to you feedback. > > > Best regards, > -- > *Frank Zhou* > R&D, Itiviti > Java Developer > D +852 2521 7480 > [email protected] <mailto:[email protected]> > > ______________________________ > > itiviti.com <https://www.itiviti.com/> > > /The information contained in or attached to this email is strictly > confidential. If you are not the intended recipient, please notify us > immediately by telephone and return the message to us./ > > /Email communications by definition contain personal information. The > Itiviti group of companies is subject to European data protection > regulations. Itiviti’s Privacy Notice is available at www.itiviti.com > <http://www.itiviti.com/>. Itiviti expects the recipient of this email > to be compliant with Itiviti’s Privacy Notice and applicable > regulations. Please advise us immediately at > [email protected] if you are not compliant with these./ > > > ______________________________ > > itiviti.com <https://www.itiviti.com/> > <https://www.linkedin.com/company/itiviti> ^Follow Itiviti on Linkedin > <https://www.linkedin.com/company/10438325/> > > The information contained in or attached to this email is strictly > confidential. If you are not the intended recipient, please notify us > immediately by telephone and return the message to us. Email > communications by definition contain personal information. The Itiviti > group of companies is subject to European data protection regulations. > > Itiviti’s Privacy Notice is available at www.itiviti.com > <http://www.itiviti.com/>. Itiviti expects the recipient of this email > to be compliant with Itiviti’s Privacy Notice and applicable > regulations. Please advise us immediately at > [email protected] if you are not compliant with these. >
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