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fix(sync): ride out a failing status poll and make the retries it announces - #41
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A first full index failed when a status poll landed while the backend was
still creating its collection. SocratiCode's codebase_status threw
Qdrant's transient 500 as a tool error. The poll loop returned on it,
closing the session and killing the index, which left an empty,
in-progress collection behind. `sync` then logged "[retry] ... in 10s
(attempt 1)", slept, and exited 1: it ran one attempt, so maxAttempts
did nothing there.
Polling:
- McpToolResult carries `failure` (spawn, exit, timeout, protocol) when
the call never reached the tool, so a tool's own error can be told
apart from a dead or refusing session.
- awaitCompletion polls again through status-tool errors, for up to the
settle window from the first error in an unbroken run. A dead session,
timeout or JSON-RPC error still fails at once.
Retries:
- McpSession.close() shuts down in the MCP stdio order (end stdin,
SIGTERM, then SIGKILL after `killAfterMs`, default 75s) and waits until
every process holding the child's pipes has gone. A backend still
shutting down can hold its project lock, and a retry started beside it
is refused that lock without being told. The child runs in its own
process group: SIGTERM goes to the direct child (npx passes it on, and
a backend must not get it twice), then to the rest of the group once
that child has exited, so a backend behind a shell that does not exec
it is reached too; SIGKILL goes to the group. The CLI passes a SIGINT,
SIGTERM or SIGHUP that interrupts it on to running backends
(forwardSignalsToBackends, opt-in for embedders).
- Worker.run() runs a job to its final outcome; sync, once and drain all
use it. A backend that had to be killed makes the failure not
retryable, so the job is parked at once instead of spending attempts.
- Busy is read only from a reply the backend gave, as whole words, with
the repo path removed: a crash whose stderr says "busy", or a repo or
collection called busybox, is not contention. The socraticode preset
and the defaults now match what SocratiCode actually says when the
project is already being indexed ("already indexing this project",
"already in progress"); the old markers matched neither, so a
contended update was recorded as done. The bare "BUSY" default is gone.
Gardening found along the way:
- park() kept neither `full=1` nor the final attempt count, so `retry`
requeued a full reindex as incremental; a re-enqueue can no longer
downgrade a pending full job either.
- processing/ was never written, so crash recovery and the `running`
state in `list --all` never worked; runJob now writes a pid marker.
- `status` shows why each failed job failed; `forget --all` parses;
`once` reports its outcome and exit code like sync.
- A session failure's error keeps the exit code and the child's last
stderr. The logger's echo can no longer throw.
- Config rejects a non-positive killAfterMs or timeoutMs, and any timer
longer than Node can wait (2^31-1 ms), which would fire after 1ms. A
timeoutMs that is not a number is still ignored, as before.
- Comments and docs corrected where they described behaviour the code
does not have, and maxAttempts/backoffSeconds are now documented.
- Tests: a 30s default timeout for the subprocess-heavy suites, CLI tests
rebuild a stale dist, and the install test isolates git config.
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Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant CLI
participant Worker
participant McpProvider
participant McpSession
participant BackendProcess
CLI->>Worker: run job
Worker->>McpProvider: index repository
McpProvider->>McpSession: start backend session
McpSession->>BackendProcess: spawn process group
McpProvider->>McpSession: poll status
McpSession-->>McpProvider: final result
McpProvider-->>Worker: retryable or final outcome
Worker-->>CLI: report final outcome
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✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 63.89% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 36 functions across 20 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@README.md`:
- Line 67: Update the README command-table description for sync to state that
failures are retried until maxAttempts total attempts have been made, including
the initial attempt. Keep the existing command syntax and behavior unchanged.
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.gitignoreREADME.mddocs/extending.mddocs/socraticode.mdsrc/cli.tssrc/config.tssrc/index.tssrc/install.tssrc/logger.tssrc/mcp.tssrc/presets.tssrc/provider.tssrc/providers/mcp-provider.tssrc/queue.tssrc/worker.tstest/cli.test.tstest/config.test.tstest/install.test.tstest/logger.test.tstest/mcp.test.tstest/provider-async-index.test.tstest/queue.test.tstest/worker.test.tsvitest.config.ts
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The bug
A scheduled
sync --fullof a repository with no index yet failed in about 2 seconds:It left behind an empty collection and an
in-progressmetadata row. Two faults combined.1. One failed status read ended the run. SocratiCode's
codebase_indexreturns at once, and we pollcodebase_statuson the same session until the index finishes. The first polls land while SocratiCode is still creating its Qdrant collection. Qdrant answers aGET /collections/{name}during thatPUTwith500 "0 of 0 read operations failed": in 19 of 40 creates on Qdrant 1.17.0, and 8 of 40 on 1.19.1. SocratiCode's status tool rethrows the 500, the MCP SDK returns it asisError: true, andawaitCompletionreturned on it.withMcpthen closed the session, and the index we were waiting on was SIGTERMed mid-setup.2.
syncnever retried.Worker.runJobrequeues a failed job, logs[retry] … in 10s, sleeps and returns"retry", but onlydrainloops on that.syncmade one attempt: it slept 10 seconds, exited 1, and left the job queued withattempts=1.maxAttemptsdid nothing for anyone indexing throughsync.What changes
Polling rides out a failing status tool, not a dead session
McpToolResult.failure(spawn|exit|timeout|protocol) is set when a call never reached the tool. A tool's own error leaves it unset.awaitCompletionpolls again through status-tool errors, for up to the settle window: 8 ×pollIntervalMs, 16s by default, measured from the first error in an unbroken run. A clean reply resets the window. A dead session, a timeout or a JSON-RPC error still fails at once.Retries are real and never race the previous backend
Worker.run(job)runs a job to its final outcome, making every attemptmaxAttemptsallows.sync,onceanddrainall use it.McpSession.close()shuts down in the MCP stdio order: end stdin, SIGTERM, then SIGKILL afterkillAfterMs(a new provider option, default 75s). It returns only once every process holding the child's pipes has gone.INDEX IS INCOMPLETE.npxpasses it on, and a backend must not get it twice.execit.forwardSignalsToBackends(), and forwarding stands aside when the program has its own handler.retryable: falseand parked at once, because its lock outlives it until it goes stale. A run that only timed out is retried: SocratiCode checkpoints and resumes.Busy means the backend said so
busybox.codebase_updatereturns an ordinary reply ending "Another process is already indexing this project, skipping". Neither the preset markers nor the defaults matched it. Both now do. The defaults drop the bareBUSY.Gardening
park()kept neitherfull=1nor the final attempt count, soretryrequeued a full reindex as incremental. A hook re-enqueue can no longer downgrade a pending full job either. Parked errors are flattened to one line so they can't corrupt the fields after them.processing/was never written, so crash recovery and therunningstate inlist --allnever worked.runJobnow writes a marker with the job and its pid.statusshows why each failed job failed, which the docs already claimed.forget --allparses; commander rejected it before.oncereports its outcome and exit code the waysyncdoes.killAfterMsmust be positive.timeoutMsmust be positive if it is a number. A non-number is still ignored, since rejecting it would silently stop hook-driven indexing.safeCwdJSDoc, the "deadline" wording, lock ownership, the stalejobKeynote and the unlock advice.maxAttempts,backoffSeconds,timeoutMsandkillAfterMsare now documented.dist, and the install test isolates git config.Alternatives rejected
McpErrorfromcallTool. That changes a public export, reorders busy/failed handling and moveshealth()to a different remedy. An additive field does the job.npxgets it twice.drain.Tests
Each regression test was checked by breaking the fix it guards, in a scratch worktree, and confirming the test then fails. That was 41 mutations over four rounds. Two survived at first: one test planted its hook job at the wrong moment, and the stderr drain had no deterministic test. Both tests were rewritten and re-checked.
isError(the old code)withMcpdoesn't awaitclose()exitinstead ofclose/ SIGTERM only the childforcedKillwhen the kill reached nothingbusyboxpath and collection; contended update;BUSY:retryableignored / not set on forced kill / set on timeoutsyncmakes one attempt /run()re-reads the queuepark()dropsfullor keeps newlines / queue downgrades full / no markeronceignores its outcome / noforget --all/ echo outside try / no timer ceiling / stricttimeoutMsnpm run lint && npm run typecheck && npm run build && npx vitest run: 428 passed, 4 skipped. Over the review rounds the full suite ran another 10 times, and the lifecycle suites 20 times under CPU load, with no failures.End-to-end check
Still to run: real SocratiCode 1.14.0 with local Qdrant 1.17.0 and Ollama, behind a proxy that holds the collection
PUTand answersGETon that collection with Qdrant's 500 while it is held. It compares the build before this change with this one. The results will be added here.Summary by CodeRabbit
New Features
--allsupport for retrying or forgetting jobs.Bug Fixes
Documentation