Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/apache/doris-skills/nodenpx skills add apache/doris-skills --skill nodegit clone --depth 1 https://github.com/apache/doris-skillsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00050 | $0.00868 |
| Opus 5 | $0.00025 | $0.00434 |
| Sonnet 5 | $0.00010 | $0.00174 |
| Haiku 4.5 | $0.00005 | $0.00087 |
Grade A, and why
doris-debug-node scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Node Health
Causes
| ID | Cause | Evidence | Source anchor |
|---|---|---|---|
| A | BE OOM / killed | dmesg shows Killed; be.WARNING MemTrackerLimiter |
mem_tracker_limiter.cpp |
| B | FE JVM OOM | GC overhead / heap dump; fe.out shows OutOfMemoryError |
fe.conf JVM opts |
| C | BE crash (SIGSEGV/SIGABRT) | Core dump; be.out stacktrace |
doris_main.cpp signal handler |
| D | False Alive | SHOW BACKENDS Alive=true but queries fail brpc |
heartbeat vs brpc health |
| E | FD exhaustion | Too many open files in be.WARNING |
ulimit -n |
10 min triage
# Memory pressure signals
./scripts/doris-debug log-grep be/log --pack memory
dmesg -T | grep -i "killed process" | tail -5
# FE JVM
jstack $(cat /path/to/fe.pid) > /tmp/fe.jstack
jmap -heap $(cat /path/to/fe.pid) 2>/dev/null | head -30
# FD count
ls /proc/$(cat /path/to/be.pid)/fd | wc -l
cat /proc/$(cat /path/to/be.pid)/limits | grep "open files"
# Resource snapshot
top -b -n 1 -p $(cat /path/to/be.pid) | head -5
free -h
Cause A — BE OOM
Doris tracks memory via MemTracker, but process RSS exceeds tracked memory due to:
- jemalloc arena fragmentation (10-20% overhead)
- brpc buffer pools (outside MemTracker)
- Thread stacks (~8MB each × thread count)
# RSS vs tracked
ps -o rss= -p $BE_PID | awk '{printf "RSS: %.1f GB\n", $1/1024/1024}'
grep "MemTrackerLimiter.*total" be/log/be.WARNING | tail -1
# be.conf — defensive settings
mem_limit = 70% # Leave 30% for overhead
max_segment_cache_size = 0 # Or cap explicitly
enable_je_purge = true # jemalloc dirty page cleanup
If ProcessMemoryReachedCancel didn't fire but OOM killer did: the gap between mem_limit and system RAM wasn't enough for jemalloc + brpc overhead.
Cause B — FE JVM
# FE JVM opts (from fe.conf or start script)
ps aux | grep "PaloFe" | grep -o "\-Xmx[^ ]*"
Common: FE heap grows with catalog metadata (many tables/partitions). Raise -Xmx or reduce hive_meta_cache_ttl_sec / catalog refresh frequency.
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 87 lines · 50 tokens per session scan A 33c3358afa1e
doris-debug-node is a skill published in the GitHub repository apache/doris-skills (37 stars, last pushed 12d ago), licensed Apache-2.0. It adds 50 tokens to every session and 868 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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