Clickhouse Js Node Troubleshooting

clickhouse/clickhouse-js-node-troubleshooting

> 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.

9k tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

35 d ago

last touched

this folder, not the whole repository

Install

one command, takes just this skill from the repository

npx skills add https://github.com/ClickHouse/agent-skills --skill clickhouse-js-node-troubleshooting

What comes with it

28 927 bytes besides the instruction

reference/compression.md

reference/data-types.md

reference/logging.md

reference/proxy-pathname.md

reference/query-format-clause.md

reference/query-params.md

reference/readonly-users.md

reference/socket-hangup.md

reference/tls.md

The instruction itself

4 sections, as written by the author

ClickHouse Node.js Client Troubleshooting

Reference: https://clickhouse.com/docs/integrations/javascript

> ⚠️ Node.js runtime only. This skill covers the @clickhouse/client package 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?

How to use it

Copy the folder

Take clickhouse/clickhouse-js-node-troubleshooting from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.