Jan 26, 2024 · Operations

Zookeeper 3.4.x Election Port 3888 Failure: Root Cause and Fix

A five‑node Zookeeper cluster on version 3.4.6 experienced election‑port 3888 failures after normal restarts, traced to a NegativeArraySizeException caused by malformed packets from a security scan, and the issue is resolved by upgrading to Zookeeper 3.4.7.

Cluster TroubleshootingElectionNegativeArraySizeException

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Zookeeper 3.4.x Election Port 3888 Failure: Root Cause and Fix

Zhuanzhuan Tech

Dec 23, 2023 · Operations

Investigation of Zookeeper 3.4.6 Election Port (3888) Failure Caused by Malformed Packets

This article details a troubleshooting investigation of a Zookeeper 3.4.6 cluster where the election port 3888 became unresponsive due to a NegativeArraySizeException triggered by malformed packets, explains the diagnostic steps, root‑cause analysis, and recommends upgrading to a newer version to fix the issue.

ApacheZookeeperClusterTroubleshootingElectionPort

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Investigation of Zookeeper 3.4.6 Election Port (3888) Failure Caused by Malformed Packets