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.