ReLab

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Run

Status

SUCCEEDED

Workflow

data-pipeline v1

Run id

e1a8ee6c-5bb4-442a-8570-5aceb2ce1065

Seed

3024093237604488000

Duration

47ms

What the journal proves

Attempts

Workers involved

Faults injected

Leases expired

Tasks requeued

Retries scheduled

Workers lost

Effects suppressed

Dead-lettered

Recovery

Every number above is a count of events in this run’s journal. Recovery is measured from the first fault, lease expiry, task failure or lost worker to the run completing, the same interval relab test asserts on.

Tasks

Each task in the run, with the attempt it reached and the worker that last held it.
Status	Task	Attempt	Worker	Error
SUCCEEDED	analyze	1/3	45cf93e9	·
SUCCEEDED	import	1/3	45cf93e9	·
SUCCEEDED	report	1/3	45cf93e9	·
SUCCEEDED	validate	1/3	45cf93e9	·

Timeline

The run’s complete recorded history, in sequence order. This is the same journal relab replay reduces. Filtering hides rows from this view; it never changes the sequence numbers, so a gap in them is still a gap.


{
  "v": 1,
  "seed": 3024093237604488000,
  "workflow_name": "data-pipeline",
  "definition_hash": "d0c1b1539e630e362b4c1acb18f66e38edd787006e2efc1435bfa3bb17bb2e97",
  "workflow_version": 1
}
{
  "v": 1,
  "attempt": 0,
  "scheduled_at": "2026-09-02T23:31:03.950342999Z"
}
{
  "v": 1,
  "task_count": 4
}
{
  "v": 1,
  "attempt": 1,
  "lease_expires_at": "2026-09-02T23:31:33.959490742Z"
}
{
  "v": 1,
  "attempt": 1,
  "handler": "import_csv"
}
{
  "v": 1
}
{
  "v": 1,
  "output": {
    "rows": 1000
  },
  "attempt": 1,
  "artifacts": [
    {
      "name": "imported.csv",
      "size": 9,
      "sha256": "6eb31300aed462386f9f52f25d0155b3ca1a9ebce4c811950777282d69a81c64",
      "content_type": "text/csv"
    }
  ],
  "duration_ms": 0
}
{
  "v": 1,
  "attempt": 0,
  "depends_on": [
    "import"
  ],
  "scheduled_at": "2026-09-02T23:31:03.97061459Z"
}
{
  "v": 1,
  "attempt": 1,
  "lease_expires_at": "2026-09-02T23:31:33.975859719Z"
}
{
  "v": 1,
  "attempt": 1,
  "handler": "validate_rows"
}
{
  "v": 1,
  "output": {
    "valid": 994,
    "invalid": 6
  },
  "attempt": 1,
  "duration_ms": 0
}
{
  "v": 1,
  "attempt": 0,
  "depends_on": [
    "validate"
  ],
  "scheduled_at": "2026-09-02T23:31:03.980691259Z"
}
{
  "v": 1,
  "attempt": 1,
  "lease_expires_at": "2026-09-02T23:31:33.984276147Z"
}
{
  "v": 1,
  "attempt": 1,
  "handler": "analyze"
}
{
  "v": 1,
  "output": {
    "mean": 497,
    "count": 994
  },
  "attempt": 1,
  "artifacts": [
    {
      "name": "analysis.json",
      "size": 24,
      "sha256": "3a6711131b05a37b630c267665849696566e3b0a7488e5bde0b0f118786ada7d",
      "content_type": "application/json"
    }
  ],
  "duration_ms": 0
}
{
  "v": 1,
  "attempt": 0,
  "depends_on": [
    "analyze"
  ],
  "scheduled_at": "2026-09-02T23:31:03.988825514Z"
}
{
  "v": 1,
  "attempt": 1,
  "lease_expires_at": "2026-09-02T23:31:33.992839772Z"
}
{
  "v": 1,
  "attempt": 1,
  "handler": "generate_report"
}
{
  "v": 1,
  "output": {
    "bytes": 26
  },
  "attempt": 1,
  "artifacts": [
    {
      "name": "report.txt",
      "size": 26,
      "sha256": "0178113cce88afc0b9d891a8762ff3b1f324d67484b30144349884d62353a3cd",
      "content_type": "text/plain"
    }
  ],
  "duration_ms": 0
}
{
  "v": 1,
  "tasks_succeeded": 4
}

20 of 20 recorded events, oldest first.
Seq	Time	What happened	Task	Worker	Technical detail
1	23:31:03.950	Run created`RUN_CREATED`	·	·	no payload fields The workflow was accepted and its tasks were written down. Event RUN_CREATED Sequence 1 Task · Worker · Occurred at 2026-09-02T23:31:03.950342Z { "v": 1, "seed": 3024093237604488000, "workflow_name": "data-pipeline", "definition_hash": "d0c1b1539e630e362b4c1acb18f66e38edd787006e2efc1435bfa3bb17bb2e97", "workflow_version": 1 }
2	23:31:03.950	Task ready to run`TASK_SCHEDULED`	import	·	attempt=0 The task's dependencies are satisfied, so it entered the queue. Event TASK_SCHEDULED Sequence 2 Task import Worker · Occurred at 2026-09-02T23:31:03.950342Z { "v": 1, "attempt": 0, "scheduled_at": "2026-09-02T23:31:03.950342999Z" }
3	23:31:03.950	Run queued`RUN_QUEUED`	·	·	task_count=4 The run's first tasks became available for a worker to claim. Event RUN_QUEUED Sequence 3 Task · Worker · Occurred at 2026-09-02T23:31:03.950342Z { "v": 1, "task_count": 4 }
4	23:31:03.959	Task claimed by a worker`TASK_LEASED`	import	45cf93e9	attempt=1 One worker holds the task for a bounded time and renews that hold while it works. The hold is on this attempt: if it expires while that worker is still running, a second worker may take the task under a new attempt number. Event TASK_LEASED Sequence 4 Task import Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.95949Z { "v": 1, "attempt": 1, "lease_expires_at": "2026-09-02T23:31:33.959490742Z" }
5	23:31:03.966	Task running`TASK_STARTED`	import	45cf93e9	attempt=1 The handler began executing. Each attempt writes one of these. Event TASK_STARTED Sequence 5 Task import Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.966637Z { "v": 1, "attempt": 1, "handler": "import_csv" }
6	23:31:03.966	Run started`RUN_STARTED`	·	·	no payload fields A worker picked up the first task in the run. Event RUN_STARTED Sequence 6 Task · Worker · Occurred at 2026-09-02T23:31:03.966637Z { "v": 1 }
7	23:31:03.970	Task finished`TASK_SUCCEEDED`	import	45cf93e9	attempt=1 duration_ms=0 The handler returned without an error and the result was recorded. Event TASK_SUCCEEDED Sequence 7 Task import Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.970614Z { "v": 1, "output": { "rows": 1000 }, "attempt": 1, "artifacts": [ { "name": "imported.csv", "size": 9, "sha256": "6eb31300aed462386f9f52f25d0155b3ca1a9ebce4c811950777282d69a81c64", "content_type": "text/csv" } ], "duration_ms": 0 }
8	23:31:03.970	Task ready to run`TASK_SCHEDULED`	validate	·	attempt=0 The task's dependencies are satisfied, so it entered the queue. Event TASK_SCHEDULED Sequence 8 Task validate Worker · Occurred at 2026-09-02T23:31:03.970614Z { "v": 1, "attempt": 0, "depends_on": [ "import" ], "scheduled_at": "2026-09-02T23:31:03.97061459Z" }
9	23:31:03.975	Task claimed by a worker`TASK_LEASED`	validate	45cf93e9	attempt=1 One worker holds the task for a bounded time and renews that hold while it works. The hold is on this attempt: if it expires while that worker is still running, a second worker may take the task under a new attempt number. Event TASK_LEASED Sequence 9 Task validate Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.975859Z { "v": 1, "attempt": 1, "lease_expires_at": "2026-09-02T23:31:33.975859719Z" }
10	23:31:03.978	Task running`TASK_STARTED`	validate	45cf93e9	attempt=1 The handler began executing. Each attempt writes one of these. Event TASK_STARTED Sequence 10 Task validate Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.978675Z { "v": 1, "attempt": 1, "handler": "validate_rows" }
11	23:31:03.980	Task finished`TASK_SUCCEEDED`	validate	45cf93e9	attempt=1 duration_ms=0 The handler returned without an error and the result was recorded. Event TASK_SUCCEEDED Sequence 11 Task validate Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.980691Z { "v": 1, "output": { "valid": 994, "invalid": 6 }, "attempt": 1, "duration_ms": 0 }
12	23:31:03.980	Task ready to run`TASK_SCHEDULED`	analyze	·	attempt=0 The task's dependencies are satisfied, so it entered the queue. Event TASK_SCHEDULED Sequence 12 Task analyze Worker · Occurred at 2026-09-02T23:31:03.980691Z { "v": 1, "attempt": 0, "depends_on": [ "validate" ], "scheduled_at": "2026-09-02T23:31:03.980691259Z" }
13	23:31:03.984	Task claimed by a worker`TASK_LEASED`	analyze	45cf93e9	attempt=1 One worker holds the task for a bounded time and renews that hold while it works. The hold is on this attempt: if it expires while that worker is still running, a second worker may take the task under a new attempt number. Event TASK_LEASED Sequence 13 Task analyze Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.984276Z { "v": 1, "attempt": 1, "lease_expires_at": "2026-09-02T23:31:33.984276147Z" }
14	23:31:03.987	Task running`TASK_STARTED`	analyze	45cf93e9	attempt=1 The handler began executing. Each attempt writes one of these. Event TASK_STARTED Sequence 14 Task analyze Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.987255Z { "v": 1, "attempt": 1, "handler": "analyze" }
15	23:31:03.988	Task finished`TASK_SUCCEEDED`	analyze	45cf93e9	attempt=1 duration_ms=0 The handler returned without an error and the result was recorded. Event TASK_SUCCEEDED Sequence 15 Task analyze Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.988825Z { "v": 1, "output": { "mean": 497, "count": 994 }, "attempt": 1, "artifacts": [ { "name": "analysis.json", "size": 24, "sha256": "3a6711131b05a37b630c267665849696566e3b0a7488e5bde0b0f118786ada7d", "content_type": "application/json" } ], "duration_ms": 0 }
16	23:31:03.988	Task ready to run`TASK_SCHEDULED`	report	·	attempt=0 The task's dependencies are satisfied, so it entered the queue. Event TASK_SCHEDULED Sequence 16 Task report Worker · Occurred at 2026-09-02T23:31:03.988825Z { "v": 1, "attempt": 0, "depends_on": [ "analyze" ], "scheduled_at": "2026-09-02T23:31:03.988825514Z" }
17	23:31:03.992	Task claimed by a worker`TASK_LEASED`	report	45cf93e9	attempt=1 One worker holds the task for a bounded time and renews that hold while it works. The hold is on this attempt: if it expires while that worker is still running, a second worker may take the task under a new attempt number. Event TASK_LEASED Sequence 17 Task report Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.992839Z { "v": 1, "attempt": 1, "lease_expires_at": "2026-09-02T23:31:33.992839772Z" }
18	23:31:03.995	Task running`TASK_STARTED`	report	45cf93e9	attempt=1 The handler began executing. Each attempt writes one of these. Event TASK_STARTED Sequence 18 Task report Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.995444Z { "v": 1, "attempt": 1, "handler": "generate_report" }
19	23:31:03.997	Task finished`TASK_SUCCEEDED`	report	45cf93e9	attempt=1 duration_ms=0 The handler returned without an error and the result was recorded. Event TASK_SUCCEEDED Sequence 19 Task report Worker 45cf93e9-d37c-4e2a-bb12-e45538a98745 Occurred at 2026-09-02T23:31:03.997252Z { "v": 1, "output": { "bytes": 26 }, "attempt": 1, "artifacts": [ { "name": "report.txt", "size": 26, "sha256": "0178113cce88afc0b9d891a8762ff3b1f324d67484b30144349884d62353a3cd", "content_type": "text/plain" } ], "duration_ms": 0 }
20	23:31:03.997	Workflow completed`RUN_SUCCEEDED`	·	·	tasks_succeeded=4 Every task finished. This event is the run's last: a finished run's story cannot change. Event RUN_SUCCEEDED Sequence 20 Task · Worker · Occurred at 2026-09-02T23:31:03.997252Z { "v": 1, "tasks_succeeded": 4 }