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58 Tech

Jan 14, 2019 · Operations

Analysis of a Linux Kernel Futex Bug Causing Java and Xtrabackup Hang on Hadoop Nodes

A detailed investigation reveals that a futex bug in Linux kernel 2.6.32-504 causes Java programs on Hadoop and xtrabackup processes to hang, and the issue can be resolved by upgrading to a newer kernel version.

FutexGDBHadoop

0 likes · 12 min read

Analysis of a Linux Kernel Futex Bug Causing Java and Xtrabackup Hang on Hadoop Nodes

Ctrip Technology

Nov 15, 2018 · Operations

Root Cause Analysis of Redis Slowlog Anomalies in Containerized Environments: Kernel TSC Bug on Skylake‑X Platforms

This article details a real‑world investigation of unexpected Redis slowlog latencies after container migration, tracing the issue through slowlog mechanics, contradictory monitoring data, gettimeofday inaccuracies, NTP drift, and ultimately a kernel bug affecting Skylake‑X CPUs, and offers concrete recommendations for reliable time measurement.

ContainerizationPerformanceRedis

0 likes · 9 min read

Root Cause Analysis of Redis Slowlog Anomalies in Containerized Environments: Kernel TSC Bug on Skylake‑X Platforms