* test(volume_server): reproduce #9184 EC ReceiveFile disk-placement bug
The plugin-worker EC task sends shards via ReceiveFile, which picks
Locations[0] as the target directory regardless of the admin planner's
TargetDisk assignment. ReceiveFileInfo has no disk_id field, so there
is no wire channel to honor the plan.
Adds StartSingleVolumeClusterWithDataDirs to the integration framework
so tests can launch a volume server with N data directories. The new
repro asserts the current (buggy) behavior: sending three distinct EC
shards via ReceiveFile leaves all three files in dir[0] and the other
dirs empty. When the fix adds disk_id to ReceiveFileInfo, this
assertion must flip to verify the planned placement is respected.
* fix(ec): honor disk_id in ReceiveFile so EC shards respect admin placement
Before this change, VolumeServer.ReceiveFile for EC shards always
selected the first HDD location (Locations[0]). The plugin-worker EC
task had no way to pass the admin planner's per-shard disk
assignment — ReceiveFileInfo carried no disk_id field — so every
received EC shard piled onto a single disk per destination server.
On multi-disk servers this caused uneven load (one disk absorbing all
EC shard I/O), frequent ENOSPC retries, and a growing EC backlog
under sustained ingest (see issue #9184).
Changes:
- proto: add disk_id to ReceiveFileInfo, mirroring
VolumeEcShardsCopyRequest.disk_id.
- worker: DistributeEcShards tracks the planner-assigned disk per
shard; sendShardFileToDestination forwards that disk id. Metadata
files (ecx/ecj/vif) inherit the disk of the first data shard
targeting the same node so they land next to the shards.
- server: ReceiveFile honors disk_id when > 0 with bounds
validation; disk_id=0 (unset) falls back to the same
auto-selection pattern as VolumeEcShardsCopy (prefer disk that
already has shards for this volume, then any HDD with free space,
then any location with free space).
Tests updated:
- TestReceiveFileEcShardHonorsDiskID asserts three shards sent with
disk_id={1,2,0} land on data dirs 1, 2, and 0 respectively.
- TestReceiveFileEcShardRejectsInvalidDiskID pins the out-of-range
disk_id rejection path.
* fix(volume-rust): honor disk_id in ReceiveFile for EC shards
Mirror the Go-side change: when disk_id > 0 place the EC shard on the
requested disk; when unset, auto-select with the same preference order
as volume_ec_shards_copy (disk already holding shards, then any HDD,
then any disk).
* fix(volume): compare disk_id as uint32 to avoid 32-bit overflow
On 32-bit Go builds `int(fileInfo.DiskId) >= len(Locations)` can wrap a
high-bit uint32 to a negative int, bypassing the bounds check before the
index operation. Compare in the uint32 domain instead.
* test(ec): fail invalid-disk_id test on transport error
Previously a transport-level error from CloseAndRecv silently passed the
test by returning early, masking any real gRPC failure. Fail loudly so
only the structured ReceiveFileResponse rejection path counts as a pass.
* docs(test): explain why DiskId=0 auto-selects dir 0 in EC placement test
Documents the load-bearing assumption that shards are never mounted in
this test, so loc.FindEcVolume always returns false and auto-select
falls through to the first HDD. Saves future readers from re-deriving
the expected directory for the DiskId=0 case.
* fix(test): preserve baseDir/volume path for single-dir clusters
StartSingleVolumeClusterWithDataDirs started naming the data directory
volume0 even in the dataDirCount=1 case, which broke Scrub tests that
reach into baseDir/volume via CorruptDatFile / CorruptEcShardFile /
CorruptEcxFile. Keep the legacy name for single-dir clusters; only use
the indexed "volumeN" layout when multiple disks are requested.
* refactor ec shard distribution
* fix shard assignment merge and mount errors
* fix mount error aggregation scope
* make WithFields compatible and wrap errors
Chris Lu