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fuseadapter: open existing files on non-exclusive create - #1279
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The server installed no signal handler, so SIGTERM/SIGINT ended the
process through Go's default disposition: the errgroup never unwound,
the CleanupStack never synced the WAL, and a --filesystemMount stayed
attached to a dead server ("Transport endpoint is not connected"). A
restart over that mount then failed in fusermount3 with "failed to
access mountpoint", leaving operators to run fusermount3 -uz by hand.
main: installShutdownSignalHandler forwards SIGTERM/SIGINT into the root
context's cancel, so a signal stop takes the same path the memory
watchdog uses (installFilesystemServerLifecycle unmounts, listeners
drain, WAL syncs). The first signal cancels; repeats while the shutdown
runs are logged and ignored, and the registration stays in place until
the store/runtime closers have run so a supervisor's second SIGTERM
cannot cut the cleanup short. A context.Canceled surfaced by the
errgroup after a signal maps to exit status 0; the memory watchdog's
exit status 2 is unchanged. filesystemStartConfig gains a test-only
mountOptions field so the kernel-mount tests can mount directly as root.
fuseadapter: Mount now detaches a dangling FUSE mount at the mount point
before mounting. A mount is only treated as stale when the topmost entry
for the path in /proc/self/mounts has type fuse or fuse.* and stat on
the path fails with ENOTCONN; a live FUSE mount, any other filesystem,
or a non-FUSE mount stacked over a dead one is never touched. Detaching
uses the helpers go-fuse's own unmount uses, fusermount3/fusermount
-u -z, and falls back to a lazy unmount(2) (umount -l) when no helper is
available, logging the mount point, type and mechanism.
Tests: a real SIGTERM to the test process cancels the root context and
unmounts a kernel mount through the production lifecycle; the detection
logic is table-driven over fake mount tables (FUSE/non-FUSE, stacked,
live, escaped paths, symlinked parents, loop bound); and an end-to-end
test SIGKILLs a helper process holding a mount, waits for ENOTCONN, and
mounts over the dangling mount it left behind.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
docs/filesystem.md is carried over from the open "docs: add FUSE filesystem guide" pull request so its sections can be updated here: "Stopping and restarting" now describes the SIGTERM/SIGINT graceful stop and that a restart detaches a dead mount itself, the startup sequence gains the stale-mount check, the troubleshooting rows for "Transport endpoint is not connected" point at a restart instead of a manual fusermount3 -uz, and "Verifying a build" names the new tests. The README sentence in "Working with the FUSE filesystem" says the same. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…ounts Review findings from CodeRabbit and Codex on the signal/stale-mount change, each with a regression test: - main: a signal (or any failure) during startDistributionStartup returned before the errgroup was drained, so the deferred CleanupStack could close the stores while the TSO reloader, raft lifecycle watchers and the registration gate were still running. Route that branch through waitErrgroupAfterStartupFailure like the other startup failures. - main: ignoreCanceledAfterSignal accepted any error for which errors.Is(err, context.Canceled) held, which includes the errors.Join that waitErrgroupAfterStartupFailure builds from a cancellation plus a real drain failure, so a genuine failure could exit 0 after SIGTERM. onlyContextCanceled walks joined errors and accepts a join only when every branch is a cancellation. - fuseadapter: an unreadable /proc/self/mounts (chroot or minimal container without /proc) failed Mount outright. The stale check now logs a warning and is skipped, so /proc is not a new mount prerequisite; the real mount still reports any conflict. - fuseadapter: exactly maxStaleMountDetaches stacked dead mounts were detached and then reported as "more than" the maximum. The loop now re-inspects after the last allowed detach and errors only when a mount is still there. - fuseadapter: a --filesystemMount that is itself a symlink was never matched, because the kernel records the symlink's target in the mounts table. The final component is now resolved with Lstat/Readlink, which never traverse into the (dead) mounted target. - docs: the startup sequence listed intent recovery before the stale-mount check; Mount runs the check first. Swapped and noted the /proc fallback. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…elative mount symlinks Second-round review findings, each with a regression test: - fuseadapter: Mount ran the stale-mount detach and the intent recovery on background contexts, so a SIGTERM that arrived while the filesystem was still starting could not interrupt a hung fusermount helper, an unavailable leader, or a long recovery backlog while the signal handler swallowed repeat signals. MountContext takes the caller's context: it aborts before any work when already cancelled, bounds the detach helper, and derives the recovery timeout from it. Mount keeps its signature as MountContext with a background context. main passes the run context through mountFilesystemService. - fuseadapter: a relative symlink target was joined to the parent as typed, so /base/link/mp with link -> /base/real/deep and mp -> ../target resolved to /base/target while the kernel mounts on /base/real/target and the stale mount was never matched. Relative targets are now joined to the canonical (symlink-resolved) parent, which is never the mount point itself. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
… failure, keep cancellation in detach Third-round review findings: - fuseadapter: syscall.MNT_DETACH is Linux-only, so the package stopped compiling on macOS, which the repository's documented `go test ./...` workflow relies on. The lazy unmount(2) fallback now lives in stale_mount_linux.go behind a build tag, with a !linux counterpart that reports the fallback as unavailable (the fusermount helpers remain the detach mechanism there). The kernel-mount E2E tests, which drive /dev/fuse and read Linux statfs fields, are tagged linux as well; `GOOS=darwin go vet` of the package and of main passes. - main: a filesystem startup failure returned straight out of startServersAfterStartupRotation while the public services were already serving on the errgroup, so the deferred CleanupStack could close the stores under running workers; with MountContext a shutdown signal during the pre-mount work reaches this branch as context.Canceled. The error now drains the errgroup through waitErrgroupAfterStartupFailure like every other startup failure. Extracted into startFilesystemAfterServing to stay within the cyclomatic budget. - fuseadapter: when the parent context was cancelled while a fusermount helper ran, the code fell through to the privileged unmount, whose EPERM (for an unprivileged server) replaced the cancellation in the error chain and turned an operator-requested stop into exit status 1. detachFUSEMount now returns the context error before the fallback; TestDetachFUSEMountReportsCancellation pins it. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…top on a busy mount Fourth-round review findings: - fuseadapter: the liveness stat on a mount the table reports as FUSE blocks for as long as a still-connected but wedged FUSE server stays wedged, and nothing interrupts the syscall, so a shutdown signal could not stop MountContext there. The stat now runs in its own goroutine and only the wait is bounded: by ctx (cancellation surfaces as a *mountProbeError wrapping context.Canceled) and by a 10 s probe timeout (a live but unresponsive server is not ours to detach; startup fails with a clear error rather than hanging in fusermount's own stat). The detach loop treats a probe error as "no verdict" and stops. - main: when Unmount failed during a signal shutdown (EBUSY: a client still held files open), installFilesystemServerLifecycle waited on the serve loop forever while the handler swallowed repeat signals, so an ordinary SIGTERM could only be finished by SIGKILL. The lifecycle now falls back to Server.UnmountLazy (fusermount -u -z / lazy unmount(2): open handles keep working until closed, new lookups see the plain directory) and bounds the wait for the serve loop by filesystemServeStopTimeout (10 s) before letting the rest of the shutdown (WAL sync, store close) run. Process exit closes /dev/fuse and the kernel drops whatever the lazy detach left behind. The lifecycle takes a small interface so the failure paths are unit-tested with a fake; TestShutdownSignalWithOpenFileDetachesLazily drives the real EBUSY case on a kernel mount. - docs: stopping section describes the busy-mount behaviour; a troubleshooting row covers the probe timeout. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…on off the FUSE mount Fifth-round review findings: - main: go-fuse's Server.Unmount waits for its event loops after the kernel unmount, and a loop stuck in a backend request (leader unavailable) never returns, so the shutdown bound added last round was never reached. stopFilesystemServer now runs the unmount in its own goroutine under one shutdown budget (filesystemServeStopTimeout): when it does not return in time the mount is detached lazily and the shutdown continues; the serve-loop wait shares the same budget. TestInstallFilesystemServerLifecycleBoundsHungUnmount drives it with a fake whose Unmount blocks. - fuseadapter: resolveMountPointSymlinks used Lstat on the mount point, which is a getattr through whatever FUSE mount covers the path and so blocks on a live but wedged server before the bounded probe runs. Readlink alone answers EINVAL for a non-symlink from the dentry type without a FUSE request, so Lstat is dropped; the existing resolution tests cover the symlink, non-symlink and missing-path cases. - docs: the stopping section says the 10 s budget covers the unmount too. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
Sixth-round review finding: the CleanupStack entry called the same sync.OnceValue-wrapped Unmount the lifecycle had started, and a second call waits for the in-flight one, so an unmount stuck in a backend request still blocked cleanup.Run (WAL sync, store close, process exit) after the lifecycle had already given up and detached lazily. The test masked it by releasing the fake before running cleanup. filesystemUnmounter starts the unmount once in the background and lets any waiter observe completion through a closed channel; the lifecycle waits on it within its budget and marks the stop handled, and the cleanup entry skips when handled or otherwise waits bounded. The hung unmount test now runs cleanup while the unmount is still stuck, and a new test covers the cleanup-only path. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…lier signal handler, go-fuse helper lookup Seventh-round review findings: - main: the lazy detach after a hung unmount opened a fresh 10 s context, so the FUSE shutdown could take 20 s against the documented 10 s total. stopFilesystemServer now runs everything under one budget: the plain unmount gets 4/5 of it, the lazy detach and the serve-loop wait the remainder of the same context. - fuseadapter: fuse.NewServer waits on the fusermount helper with no context (callFusermount does proc.Wait), so a hung helper blocked MountContext, the errgroup drain and the WAL sync behind it even after a signal. newServerContext runs it in a goroutine and returns on cancellation; a mount that completes after the caller gave up is unmounted again. TestMountContextAbortsWhileMountHelperHangs puts a fusermount3 stand-in that sleeps on PATH and checks the cancel wins. - main: the root context and the signal handler were installed after buildShardGroupsWithEncryptionWiring, so a SIGTERM during a slow open or snapshot restore still killed the process through the default disposition. They are now installed before the runtimes open; the stop cancels ctx and startup unwinds through the normal path once the runtimes exist. - fuseadapter: the detacher looked up fusermount3/fusermount on PATH only, while go-fuse also falls back to /bin, so a service with a restricted PATH could mount but not detach. lookupMountHelper mirrors go-fuse's lookup; TestLookupMountHelperFallsBackLikeGoFuse covers PATH, fallback and PATH precedence. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
… MountContext Eighth-round review finding: when cancellation won the select but fuse.NewServer later succeeded, the late cleanup called Unmount without Serve. go-fuse's NewServer adds the event loop to its wait group and Unmount waits for that group, while only Serve runs the loop that releases it, so the cleanup goroutine, the server and the /dev/fuse descriptor were retained for the life of the process. releaseAbandonedMount starts Serve, unmounts (the loop exits once the kernel unmount closes the connection), and falls back to the lazy detach when the unmount fails. TestReleaseAbandonedMountReturns mounts for real, hands the server over the same channel, and requires the release to return and the mount table to be clean. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…unt helper hangs Ninth-round review finding: detachFUSEMount gave each fusermount helper the caller's whole remaining deadline, so a helper that hung until the budget expired made the cancellation check return before the privileged unmount(2) fallback, and a CAP_SYS_ADMIN server could exit after SIGTERM with the disconnected mount still attached. detachHelperTimeout now gives one helper invocation the smaller of detachCommandTimeout and half of what is left of the caller's deadline, and the killed helper's pipes are waited on for at most 500 ms (exec.Cmd.WaitDelay), so the fallback still runs inside the budget. TestDetachFUSEMountReachesKernelFallbackWhenHelperHangs puts a stand-in on PATH that execs /bin/sleep, gives the detach a 400 ms deadline, and requires the error to come from the fallback rather than the deadline after the helper was given its share. The earlier hung-helper mount test's stand-in is fixed the same way: with PATH pointed at the stand-in directory a bare `sleep` was not found, so it had not been hanging; both tests now also assert they really waited on the helper. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
The startup sequence was renumbered when the stale-mount check moved ahead of intent recovery; the stopping section still cited step 4. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…ung unmount Tenth-round review findings: - main: GracefulStop blocks until every in-flight RPC ends, and the long-lived streams (catalog watches, the Raft transport's SendStream) only end when their client disconnects, so on a multi-node server a SIGTERM could wait forever in startRaftServers while repeat signals were swallowed, and the WAL sync and store close never ran until SIGKILL. stopGRPCServerBounded drains for at most grpcGracefulStopTimeout (10 s) and then calls Stop, which closes the remaining streams and lets the pending GracefulStop return. TestStopGRPCServerBoundedForcesStopOnLongLivedStream opens a stream whose handler only returns when its context ends and requires the stop to return after the bound; an idle-server test checks nothing is forced when GracefulStop finishes on its own. - main: after a hung unmount the lifecycle detached lazily and returned at once, skipping the reserved remainder of the budget, so a backend request that would have finished inside the advertised 10 s could still be cut off by the store close. The timeout branch now falls through to the same serve-loop wait as the normal branch. TestInstallFilesystemServerLifecycleWaitsForServeLoopAfterHungUnmount requires the loop ending to be observed inside the reserved slice. - docs: the stopping section mentions the bounded gRPC drain. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
docs/filesystem.md was carried over from the FUSE guide pull request (#1271), which has since landed on main, and both sides edited the same README paragraph, so merging main conflicted. Reset both files to main's text here so the merge applies cleanly; the next commits put this branch's signal-stop and stale-mount wording back on top. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…t recovery Puts this branch's documentation back on top of main's guide after the merge (it previously arrived in 7ffad3e, 9916d3e, 661da97, 11a73f6 and 720afc8): - Startup sequence step 3: the stale-mount check acts only on a dead `fuse.elastickv` mount (the type the server mounts with) and is skipped with a warning when /proc/self/mounts cannot be read. - Stopping and restarting: SIGTERM/SIGINT unmount, drain and sync, then exit 0 for a clean shutdown; a busy mount is detached lazily within the 10 s budget; gRPC, DynamoDB/S3/SQS HTTP and Redis each get a bounded drain; a restart after SIGKILL or a crash detaches the dead mount itself. - Troubleshooting rows for the detach failure, the probe and resolution timeouts, and a dead mount of another type; "Verifying a build" names the signal and stale-mount end-to-end tests. - README: the FUSE paragraph says the same in one sentence. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…uest holds open Restores 9916d3e and the monitoring half of 163eddd on top of the main merge: - monitoring.ShutdownHTTPServer drains an http.Server for at most the given timeout, then Close()s the remaining connections and reports that forced stop as success; only a Close that fails, or a Shutdown error other than the deadline, is returned. A pprof profile asked for 30 s or a stalled scrape therefore can no longer turn a SIGTERM into a failed run (exit 1 instead of 0) or hold the shutdown open. MetricsShutdownTask and PprofShutdownTask use it. - adapter.shutdownHTTPServer delegates to it with httpShutdownTimeout (10 s) and logs a failure, since Stop has no error to return; the DynamoDB adapter's Stop goes through it. Tests: TestShutdownHTTPServerForcesCloseAfterTimeout, TestShutdownHTTPServerReturnsPromptlyWhenIdle, TestShutdownHTTPServerNilIsNoop and TestAuxiliaryShutdownTasksReturnNilAfterForcedClose (metrics and pprof tasks under an errgroup with a stalled request: Wait returns nil inside the bound). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
Restores the SQS half of 9916d3e: SQSServer.Stop cancels the reaper and then goes through shutdownHTTPServer, so in-flight requests get at most httpShutdownTimeout (10 s) before the remaining connections are closed and a client that stalls mid-request cannot hold a signal stop open. In listenless (admin-only) mode Shutdown returns at once as before. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
Restores 71c04ae on top of the main merge and addresses the Codex finding on it: - redcon ends Serve as soon as the listener closes and closes the connections, but does not join the goroutines handling them, so a command still executing at SIGTERM (a SETEX waiting on Raft) kept running after the Redis errgroup task had finished and the deferred cleanup could close the stores underneath it. RedisServer counts the commands being executed and Stop waits up to redisShutdownTimeout (10 s) for the count to reach zero; only the first Stop waits. - New: redcon dispatches every command of an already-parsed pipeline even after Stop closed the connection, so the command behind a long-running one entered after the count had reached zero and the drain was declared complete, then ran against stores being closed. The counter is now an inflightGate that refuses entry once the drain began: the increment precedes the draining check and drain sets draining before it reads the count, so either the drain sees the command or the command sees the drain. A refused command is not executed (its connection is already closed). Tests: TestRedisServerStopWaitsForInflightCommandWithinBound, TestRedisServerStopReturnsOnceInflightCommandFinishes, TestRedisServerStopReturnsPromptlyWhenIdle, the new TestRedisServerStopRejectsPipelinedCommandAfterDrain (pipelines BLOCKTEST + COUNTTEST; COUNTTEST ran after Stop before the fix), and TestInflightGate* for the gate itself. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…ng the blob cluster Restores the S3 half of 9916d3e and 204f372 on top of the main merge and addresses the Codex finding on the latter: - Stop drains the HTTP listener through shutdownHTTPServer (bounded by httpShutdownTimeout, 10 s, then the remaining connections are closed) instead of an unbounded Shutdown, and closes the blob peer cluster only after that drain, so an upload or read still inside the graceful window keeps its peers. - New: the admin listener's S3 object bridge and the gRPC admin forwarder call AdminPutObject / AdminGetObject on the same server outside its HTTP listener and drain on their own; with the S3 listener idle its drain is over at once and the cluster was closed under an admin download or upload still fetching or replicating chunk blobs. S3Server now counts those operations in an inflightGate (adminBlobUsers) and Stop waits for them, bounded the same way, before closing the cluster. The admin side lands in the next commit. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…ter for them Second half of the S3 shutdown change, with its tests (restores the bounded-stop tests of 9916d3e and 204f372, and addresses the Codex and CodeRabbit findings on the latter): - AdminPutObject registers with the server's admin blob-use gate for the whole upload, AdminGetObject for the life of the returned body (its Close releases it), so S3Server.Stop waits for them before closing the blob peer cluster. Once Stop began, both refuse with the new ErrAdminS3Stopping instead of starting against a cluster that is about to close. - TestS3ServerStopDrainsHTTPBeforeClosingBlobCluster now checks the cluster while Stop is still inside its graceful window and that Stop has not returned yet, instead of reading the state from the handler: a forced Close does not wait for the handler, so the old check could race with the close (CodeRabbit). - TestS3ServerStopWaitsForAdminObjectReadBeforeClosingBlobCluster holds an AdminGetObject body open across Stop on a server whose S3 listener is idle; before the fix the cluster was closed at once (Codex P2). TestS3ServerStopGivesUpOnUnclosedAdminReadAfterBound covers a body nobody closes. - The HTTP adapter tests (TestHTTPAdapterStopBoundsStalledRequest, ...ReturnsPromptlyWhenIdle, ...IsIdempotentAfterForcedClose) come back with this file. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
Codex finding on the SQS bounded stop: Stop cancelled reaperCtx and drained the HTTP server but never joined the goroutines Run started (the retention reaper and the throttle bucket sweep). In a listenless (admin-only) deployment the HTTP shutdown returns at once, Run unblocks on the same cancellation, and the errgroup could finish while the reaper was still inside a store scan or a Raft dispatch, letting the deferred cleanup close the shard store underneath it. Run now starts both workers through sqsWorkers, a WaitGroup guarded by a mutex that refuses new workers once Stop began (so a Run racing a Stop cannot start one the join already missed). Stop, after the HTTP drain, waits up to sqsWorkerStopTimeout (10 s, the same bound as the other listeners) for them and logs if it has to give up; only the first Stop waits. Tests: TestSQSServerStopJoinsBackgroundWorkers (Stop returned at once with a worker still running before the fix), TestSQSServerStopGivesUpOnStuckWorkerAfterBound (bound honoured, second Stop prompt), TestSQSServerListenlessRunReturnsAfterStop. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…mount Name Restores 163eddd (fuseadapter half), 11a73f6, 6518c68 and d77d474 on top of the main merge, and fixes two findings on them: Restored behaviour: - detachFUSEMount checks the mounts table before the helpers run and again right before the unmount(2) fallback, and only acts on a mount of this server's own type; UnmountLazy and the abandoned-mount release treat errNoFUSEMount as nothing to do, and the startup loop re-inspects instead of counting it. - The helper share of the deadline reserves the 500 ms pipe wait, the mount-point resolution and the liveness stat are bounded, and an abandoned mount's Unmount is bounded with a lazy-detach fallback. New: - go-fuse records a mount's type as "fuse."+MountOptions.Name (the subtype; FsName only fills the source column), but the type the server remembered for its stale-mount check and lazy detach was built from FsName. With the defaults both are "elastickv"; with a custom Name the server would never have recognised its own mount (CodeRabbit). The type is now built from opts.Name; TestMountContextTypeFollowsMountName mounts for real with FsName != Name and failed before the fix. - The tests that put fusermount stand-ins on PATH also pointed only PATH at them, so a real /bin/fusermount on the host (GitHub's Ubuntu runners ship one) ran after the stand-ins through the go-fuse style fallback and replaced the error the test checked: TestDetachFUSEMountRechecksBeforeKernelFallback failed in CI. onlyMountHelpersIn points both PATH and mountHelperFallbackDir at the stand-in directory; reproduced locally with a fake fusermount in the fallback directory. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…nly after the bounded gRPC stop Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
… like a follower The admin listener shuts down through monitoring.ShutdownHTTPServer, so a request outliving the drain window is force-closed and the task returns nil instead of context.DeadlineExceeded (which made a SIGTERM during a slow admin request exit 1). translateAdminObjectsError maps adapter.ErrAdminS3Stopping to the not-leader sentinel, so an admin object request reaching a stopping S3 server gets 503 with Retry-After instead of a 500. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
fusermount3 can detach our mount and still report a failure (a descendant holding its output pipe past WaitDelay, for example). The legacy fusermount helper accepts any FUSE filesystem, so running it without a recheck could detach a foreign FUSE mount that the first helper exposed. The mounts table is now checked again before each helper that follows a failed one; a path that no longer shows our mount yields errNoFUSEMount with the first failure kept in the chain, and neither the second helper nor the kernel fallback runs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
go-fuse's WaitMount runs a poll hack that opens a file on the new mount. The kernel's default_permissions check on the root sends a getattr through to the backend, which can block while no leader is available, and WaitMount has no context. main installs the filesystem shutdown lifecycle only after it returns, so a SIGTERM in that window cancelled the run context and then waited forever, with repeat signals ignored and the WAL sync never reached. Server.WaitMount now also stops on the context MountContext ran under. Its release then does three things in order: - It cancels every in-flight request through a parent context that all request contexts now derive from, so the kernel gets its answer. The caller of a request already sent to the server waits for it uninterruptibly, here inside this very process. - Once the readiness check has returned, it unmounts under the abandoned-mount bound with the guarded lazy detach as fallback. If the check does not return within the bound, it does only the lazy detach, since go-fuse's Unmount must not run alongside it. - It marks the Server released, so the Unmount and serve-loop waits in main return at once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
exec.LookPath stats each PATH directory, and a directory on a wedged FUSE or network filesystem blocks that stat with nothing to interrupt it. The lookup ran before the context-bounded helper invocation, so a shutdown lazy detach could outlast its budget forever with repeat signals ignored. The lookup now runs in its own goroutine under the same share of the deadline a helper invocation gets. A lookup that does not answer counts as the helper not being found, so the kernel fallback stays reachable inside the caller's budget. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
The mounts-table recheck ran only before a helper that followed a failed one, so the first helper's lookup window, and any helper after a failed lookup, ran without it. If go-fuse's plain unmount finished while the lookup was resolving, fusermount3 -u -z could act on a foreign FUSE mount that had become exposed at the path. The check now runs after every lookup, immediately before each helper. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
…cluster The four background cleanups (stale manifest blobs, upload parts, part blobs, upload data) ran on detached goroutines with a context derived from context.Background(), so Stop could close the blob cluster, and the caller the stores, while one was still dispatching deletes. Stop now waits for them under the same bound it already gives the admin object operations, then cancels the ones still running. Cleanups that would start after Stop has begun are refused. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LN7tsspP7vwxJeM85TU7EN
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HEAD 2058528 consolidates common FUSE/admin shutdown safety in #1273, with #1279 and #1291 consuming the shared implementation. Incorporated latest fetched main 4c28eda, retaining both SQS shutdown workers and new admin audit fields. Reaper regressions and strict filesystem harness remain unchanged from main. Scoped race tests pass; Linux lint found one unchanged-main issue at adapter/sqs_admin_peek.go:211 (cyclop 11 > 10), reported to the parent rather than duplicated outside this scope. @codex review |
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Lint clarification: the prior AdminPeekQueue cyclop result came from an unfiltered local full-file run and is unchanged main code. CI uses --new-from-rev=origin/main; a local Linux run with that same diff filter now reports 0 issues. Current-head CI remains the authoritative result. |
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Actionable comments posted: 1
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @internal/filesystem/fuseadapter/server.go:
- Around line 205-211: createOrOpen
の再試行判定を更新し、コミット前であることを保証できるエラーだけを再試行してください。store.ErrWriteConflict
など適用済みの可能性があるエラーは、EAGAIN に変換されても再試行せず、O_EXCL の有無にかかわらず初回の作成結果と open handle
を保てるよう、errno 変換前のエラー情報で判別してください。
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📒 Files selected for processing: 60
README.mdadapter/background_reservation_shutdown_test.goadapter/background_workers.goadapter/dynamodb.goadapter/dynamodb_migration.goadapter/dynamodb_schema.goadapter/dynamodb_table_cleanup_shutdown_test.goadapter/http_shutdown.goadapter/http_shutdown_test.goadapter/inflight_gate.goadapter/inflight_gate_test.goadapter/redis.goadapter/redis_shutdown.goadapter/redis_shutdown_test.goadapter/s3.goadapter/s3_admin_delete_shutdown_test.goadapter/s3_admin_objects.goadapter/s3_cleanup_reservation.goadapter/s3_cleanup_shutdown_test.goadapter/s3_shutdown.goadapter/sqs.goadapter/sqs_reaper.goadapter/sqs_shutdown.goadapter/sqs_shutdown_test.godocs/filesystem.mdinternal/filesystem/fuseadapter/abandoned_mount_test.gointernal/filesystem/fuseadapter/detach_helper_lookup_test.gointernal/filesystem/fuseadapter/detach_helper_recheck_test.gointernal/filesystem/fuseadapter/helper_process_test.gointernal/filesystem/fuseadapter/helper_process_unix.gointernal/filesystem/fuseadapter/mount_context_test.gointernal/filesystem/fuseadapter/mount_e2e_test.gointernal/filesystem/fuseadapter/mount_helper_cancel_test.gointernal/filesystem/fuseadapter/release_deadline_test.gointernal/filesystem/fuseadapter/server.gointernal/filesystem/fuseadapter/server_ops_test.gointernal/filesystem/fuseadapter/stale_mount.gointernal/filesystem/fuseadapter/stale_mount_e2e_test.gointernal/filesystem/fuseadapter/stale_mount_guard_linux_test.gointernal/filesystem/fuseadapter/stale_mount_linux.gointernal/filesystem/fuseadapter/stale_mount_other.gointernal/filesystem/fuseadapter/stale_mount_test.gointernal/filesystem/fuseadapter/unmount_context.gointernal/filesystem/fuseadapter/unmount_context_test.gointernal/filesystem/fuseadapter/unmount_lazy_cancel_test.gointernal/filesystem/fuseadapter/wait_mount_cancel_test.gomain.gomain_admin.gomain_admin_dynamo_stopping_test.gomain_admin_lifecycle_test.gomain_admin_shutdown.gomain_admin_shutdown_test.gomain_filesystem_test.gomain_grpc_stop_test.gomain_shutdown_signal_log_test.gomain_shutdown_signal_test.gomonitoring/http.gomonitoring/http_shutdown.gomonitoring/http_shutdown_test.gomonitoring/pprof.go
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Current HEAD: d8110d4 (signed, bootjp). Addressed roots 4352109565, 4352109574 and 4352125882: bounded join for abandoned mount cleanup, end-of-join reservation invalidation, and no replay of ambiguous Create EAGAIN for either exclusive or nonexclusive requests. Shared shutdown changes are owned by #1273 and merged here; no duplicated implementation. Latest main 1dc9763 is included with parent reaper/checker behavior preserved. Full portable FUSE race passed, shutdown race regressions x3 passed, Linux lint 0 issues. Final integrated race/CI checks ongoing. Late mutation cleanup is invalidated after Stop, not made durable; see inline limitations. Please review this exact HEAD. @codex review |
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Codex Review: Didn't find any major issues. What shall we delve into next? Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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🛡️ Codex Security Review · Automatically triggeredSecurity review completed. No security issues were found in this pull request. Reviewed commit: Only the user who started this review can view the report in Codex. ℹ️ About Codex security reviews in GitHubThis is an experimental Codex feature. Security reviews are triggered when:
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Final CI follow-up HEAD: bc9d09a (signed and verified, bootjp). Ubuntu run 39834822646 exposed the collision fixture racing into an OCC EAGAIN; the production no-replay behavior correctly surfaced that ambiguous result. The fixture now serializes only backend Create calls after its two-mount FUSE_CREATE barrier, guaranteeing the definite EEXIST path this test targets. No production retry was reintroduced, no error was ignored, and the positive collision / exactly-one-created-descriptor assertions remain. Local Linux real-kernel FUSE collision test passed 20 repetitions in a disposable network-isolated container with ELASTICKV_REQUIRE_FUSE=1. Linux cross-compile and lint pass; full real-kernel FUSE suite is running. Please review this exact final HEAD. @codex review |
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Additional validation for unchanged HEAD bc9d09a: the complete FUSE package now also passed with race detection against the real Linux ARM64 kernel (ELASTICKV_REQUIRE_FUSE=1), built using the cached Go 1.26.6 image and executed in the existing cached FUSE image. Both containers were disposable/network-isolated; no host services or user worktrees changed. The earlier non-race collision stress x20 and full suite also passed. Current Ubuntu x86 CI remains authoritative for that platform. |
🛡️ Codex Security Review · Automatically triggeredSecurity review completed. No security issues were found in this pull request. Reviewed commit: Only the user who started this review can view the report in Codex. ℹ️ About Codex security reviews in GitHubThis is an experimental Codex feature. Security reviews are triggered when:
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@codex review |
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Codex Review: Didn't find any major issues. Chef's kiss. Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
If Codex has suggestions, it will comment; otherwise it will react with 👍. Codex can also answer questions or update the PR. Try commenting "@codex address that feedback". |
🛡️ Codex Security Review · Automatically triggeredSecurity review completed. No security issues were found in this pull request. Reviewed commit: Only the user who started this review can view the report in Codex. ℹ️ About Codex security reviews in GitHubThis is an experimental Codex feature. Security reviews are triggered when:
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Summary
Reproduction
The filesystem Jepsen workload opens each register through three mounts with O_RDWR|O_CREAT. A mount without a positive dentry can receive FUSE_CREATE after another mount has created the file; the old path returned EEXIST to the non-exclusive open.
Risk
The collision path adds Lookup and Open calls; O_TRUNC also calls SetAttr. Retries are limited to four create attempts. The normal create path is unchanged. The Linux FUSE regression passed five runs; occasional Release EAGAIN warnings during that test remain outside this change.
Validation
go test -race ./internal/filesystem/...— passed.make lint— 0 issues.Self-review
Author: bootjp
CI follow-up
Reviewdog found G115 on the Linux-only mount test: a direct int-to-uint32 UID/GID conversion was excluded from local macOS lint. The test now reads the native uint32 owner IDs from its process-owned temporary directory. Linux-targeted full lint, local make lint, race tests, and five Linux FUSE race runs pass after this change.
Summary by CodeRabbit
不具合修正
ドキュメント