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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Cloudstack 4.20 UI becomes irresponsive. Restart the server to recover, it happens every 10 days.","articleBody":"Description:\nI'm experiencing a critical issue with CloudStack 4.20 where all API endpoints become unresponsive approximately every 10 days. The only temporary resolution is to restart the CloudStack management server.\n\nObserved Behavior:\n\nAPI requests timeout/fail completely after ~10 days of uptime\n\nNo explicit ERROR messages in logs prior to outage\n\nFound an unusually large INFO-level log entry (3MB per line) that might be relevant\n\nAttached log file: [filename.log] (Please ensure you actually attach the file via GitHub interface)\n\nEnvironment:\n\nCloudStack Version: 4.20.0.0\n\nOS:Ubuntu 24.04\n\n\nSteps to Reproduce:\n\nStart CloudStack management server\n\nOperate normally for ~10 days\n\nAPI services become unavailable without obvious triggers\n\nExpected Behavior:\nAPI endpoints should remain available continuously without requiring manual restarts.\n\nAdditional Context:\n\nThe large INFO-level log entry repeats periodically (full content attached)\n\nNo observed resource exhaustion (CPU/MEM) before outages\n\nProblem persists across multiple maintenance windows\n\nTroubleshooting Attempted:\n\nReviewed standard error logs - no smoking gun\n\nMonitored system resources - no apparent bottlenecks\n\nServer restart temporarily resolves the issue\n\nRequest:\nPlease help investigate:\n\nPotential memory leaks or thread blocking in the 4.20 codebase\n\nSignificance of the oversized INFO log entries\n\nUpdate to Original Issue:\nFurther analysis of the oversized INFO log reveals repetitive entries related to createVPCOffering API calls. The JSON payload in these logs appears to be abnormally large (3MB per line) and contains repetitive configuration data.\n\nKey Log Excerpt Pattern:\nINFO [c.c.a.ApiServlet] (qtp123456789-42:) {cmd=\"createVPCOffering\", ... JSON payload (3MB) ...}\n\n\n![Image](https://github.com/user-attachments/assets/f900807c-3aca-4028-bea7-ea76cc1c94d2)\n","author":{"url":"https://github.com/ztskycn","@type":"Person","name":"ztskycn"},"datePublished":"2025-03-17T09:18:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":24},"url":"https://github.com/10578/cloudstack/issues/10578"}