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From Bryan Bende <bbe...@gmail.com>
Subject Re: TCP Connection Limit Error
Date Thu, 14 Jun 2018 19:32:47 GMT
I don’t remember any specific bugs around the connection handling on NiFi
side, but since there have been quite a few release since 0.6.1, it
wouldn’t hurt to try upgrading.

On Thu, Jun 14, 2018 at 3:26 PM Rajesh Biswas <rajesh.biswas@bridgera.com>
wrote:

> Hello Bryan,
>
> Thank you very much for your response.
>
> We thoroughly checked the client piece of the code about managing the
> opened connection.
>
> TCP Processor feeds the incoming data into Kafka Queue to inject the data
> into our system.
>
> Do you suggest is there any known issue in NiFi (0.6.1) version, do you
> suggest upgrade the version may solve this issue?
>
>
>
> Thanks and Regards,
>
> *Rajesh Biswas* | +91 9886433461 | www.bridgera.com
>
>
>
> *From:* Bryan Bende [mailto:bbende@gmail.com]
> *Sent:* Friday, June 15, 2018 12:50 AM
> *To:* users@nifi.apache.org
> *Cc:* dev@nifi.apache.org
> *Subject:* Re: TCP Connection Limit Error
>
>
>
> Hello,
>
>
>
> There is a counter that is incremented when a connection is opened, and
> decremented when it is closed. When this counter exceeds the number
> configured in the processor, then it rejects the connection with the
> message you are seeing. Since you have the max connections set to 1000,
> there must be over 1000 connections being opened.
>
>
>
> You could probably use something like nestat or some other networking
> monitoring utility to see what connections are open. Also may want to look
> into whatever the source of the connections is to see how it is opening and
> closing connections.
>
>
>
> Thanks,
>
>
>
> Bryan
>
>
>
> On Thu, Jun 14, 2018 at 3:07 PM Rajesh Biswas <rajesh.biswas@bridgera.com>
> wrote:
>
> Hello Team,
>
> We are using TCP Processor to receive input from external systems.
>
> We are frequently receiving max connection timeout exception
>
> We feel the number of configured connections are more than our
> requirements.
>
> Is there any way to monitor the open connections.
>
> How we can know that open connections are not closed after data is
> received from external systems?
>
> The NiFi version is 0.6.1
>
> Please find the log file for the reference
>
>
>
> Exception:
>
> Rejecting connection from /162.244.250.137:25558 because max connections
> has been met
>
>
>
> Attached log file and processor properties
>
>
>
>
>
> Thanks and Regards,
>
> *Rajesh Biswas* | +91 9886433461 | www.bridgera.com
>
>
>
>
>
>
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