RE: KAFKA 2.13-3.3.1 Zookeeper issue

HI KAFKA Users, We have two configured Linux Kafka on the 2 environment UAT and PRODUCTION. Environment through same warning simultaneous Every 12 hours once same exact time. So can anyone please share the Root cause of the issue and solution of the issue. Issue has been observed last month 17 APR 2026 onwards. Thanks and Regards, THIRUVARASAMOORTHI R. From: R THIRUVARASAMOORTHI Sent: 06 May 2026 10:34 To: 'users@kafka.apache.org' <users@kafka.apache.org> Cc: RAJARAM KUMAR <RAJARAM.KUMAR2@mahindra.com> Subject: KAFKA 2.13-3.3.1 Zookeeper issue Hello Kafka Community, We are currently using Kafka version kafka_2.13-3.3.1 on a Linux Ubuntu server. This setup has been running successfully for the past two years to integrate two PLM [3DExperience and Teamcenter] applications. In recent days, we have encountered recurring issues in the Zookeeper services, and it leads to bring down the zookeeper service within 10 days: Every 12 hours/24 hours, Zookeeper logs/ terminal Console the following warning: WARN Unexpected exception (org.apache.zookeeper.server.NIOServerCnxn) EndOfStreamException: Unable to read additional data from client, it probably closed the socket: address = /127.0.0.1:40312, session = 0x103e76486150001 at org.apache.zookeeper.server.NIOServerCnxn.handleFailedRead(NIOServerCnxn.java:163) at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:326) We have already tried adjusting parameters in zookeeper.config (such as maxClientCnxns and session timeouts), but the changes are not reflected as expected. Request: Could you please advise on: The root cause of the recurring EndOfStreamException every 12 hours or 24 hours once and how to resolve this issue. Thank you for your guidance and support. Thanks and Regards, THIRUVARASAMOORTHI R ________________________________ ---DISCLAIMER---------------------------------------------------------------------------- The contents of this E-mail (including the contents of the enclosure/(s) or attachment/(s) if any) are privileged and confidential material of Mahindra and Mahindra Limited (M&M) and should not be disclosed to, used by or copied in any manner by anyone other than the intended addressee/(s). If this E-mail (including the enclosure/(s) or attachment/(s) if any ) has been received in error, please advise the sender immediately and delete it from your system. The views expressed in this E-mail message (including the enclosure/(s) or attachment/(s) if any) are those of the individual sender. ------------------------------------------------------------------------------------------ ________________________________ ---DISCLAIMER---------------------------------------------------------------------------- The contents of this E-mail (including the contents of the enclosure/(s) or attachment/(s) if any) are privileged and confidential material of Mahindra and Mahindra Limited (M&M) and should not be disclosed to, used by or copied in any manner by anyone other than the intended addressee/(s). If this E-mail (including the enclosure/(s) or attachment/(s) if any ) has been received in error, please advise the sender immediately and delete it from your system. The views expressed in this E-mail message (including the enclosure/(s) or attachment/(s) if any) are those of the individual sender. ------------------------------------------------------------------------------------------