ClickHouse/clickhouse-js-node-troubleshooting
skills/clickhouse-js-node-troubleshooting/SKILL.md
Troubleshoot and resolve common issues with the ClickHouse Node.js client (@clickhouse/client). Use this skill whenever a user reports errors, unexpected behavior, or configuration questions involving the Node.js client specifically — including socket hang-up errors, Keep-Alive problems, stream handling issues, data type mismatches, read-only user restrictions, proxy/TLS setup problems, or long-running query timeouts. Trigger even when the user hasn't precisely named the issue; vague symptoms like "my inserts keep failing" or "connection drops randomly" in a Node.js context are strong signals to use this skill. Do NOT use for browser/Web client issues.
$ install --global
skillsauthnpx skillsauth add ClickHouse/agent-skills clickhouse-js-node-troubleshootingInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Jul 6, 2026, 3:48 AM122.6s11 files scanned
SKILL.md
- name:
- clickhouse-js-node-troubleshooting
- description:
- >
ClickHouse Node.js Client Troubleshooting
Reference: https://clickhouse.com/docs/integrations/javascript
⚠️ Node.js runtime only. This skill covers the
@clickhouse/clientpackage running in a Node.js runtime exclusively — including Next.js Node runtime API routes, React Server Components, Server Actions, and standard Node.js processes. Do not apply this skill to browser client components, Web Workers, Next.js Edge runtime, Cloudflare Workers, or any usage of@clickhouse/client-web. For browser/edge environments, the correct package is@clickhouse/client-web.
How to Use This Skill
- Identify the issue — match symptoms to the Issue Index below and read the corresponding reference file.
- Lead with the diagnosis — explain what's likely causing the issue before giving the fix.
- Note version constraints — flag if a fix requires a minimum client version and check it against what the user provided.
- Ask only what's missing — if the fix is version-dependent and you don't know their version, ask; otherwise help immediately.
Issue Index
Identify the user's issue from the list below and read the corresponding reference file for detailed troubleshooting steps.
| Issue | Symptoms | Reference file |
| ------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------- |
| Socket Hang-Up / ECONNRESET | socket hang up, ECONNRESET, intermittent connection drops, long-running queries timing out | reference/socket-hangup.md |
| Data Type Mismatches | Large integers returned as strings, decimal precision loss, Date/DateTime insertion failures, CANNOT_PARSE_INPUT_ASSERTION_FAILED inserting a UUID into a UInt128 column | reference/data-types.md |
| Read-Only User Errors | Errors when using response compression with readonly=1 users | reference/readonly-users.md |
| Proxy / Pathname URL Confusion | Wrong database selected, requests failing behind a proxy with a path prefix | reference/proxy-pathname.md |
| TLS / Certificate Errors | TLS handshake failures, certificate verification issues, mutual TLS setup | reference/tls.md |
| Compression Not Working | GZIP compression not activating for requests or responses | reference/compression.md |
| Logging Not Showing Anything | No log output, need custom logger integration | reference/logging.md |
| Query Parameters Not Interpolated | Parameterized queries not working, SQL injection concerns | reference/query-params.md |
| FORMAT Clause / SHOW POLICIES Errors | Syntax error from a duplicate FORMAT, or SHOW [ROW] POLICIES failing even with a format provided | reference/query-format-clause.md |
Still Stuck?
- JS client source + full examples
- ClickHouse JS client docs
- ClickHouse supported formats
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