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client: prevent using stale allocs #18601

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merged 2 commits into from
Sep 28, 2023
Merged

client: prevent using stale allocs #18601

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76ab3a9
client: prevent using stale allocs
schmichael Sep 27, 2023
d2bd436
cleanup log style
schmichael Sep 28, 2023
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20 changes: 19 additions & 1 deletion client/client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2359,7 +2359,7 @@ OUTER:
//
// For full context, please see https://github.com/hashicorp/nomad/issues/18267
if resp.Index <= req.MinQueryIndex {
c.logger.Debug("Received stale allocation information. Retrying.",
c.logger.Debug("received stale allocation information; retrying",
"index", resp.Index, "min_index", req.MinQueryIndex)
continue OUTER
}
Expand Down Expand Up @@ -2419,6 +2419,24 @@ OUTER:
}
}

// It is possible that Alloc.GetAllocs hits a different server than
// Node.GetClientAllocs which returns older results.
if allocsResp.Index <= allocsReq.MinQueryIndex {
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retry := c.retryIntv(getAllocRetryIntv)
c.logger.Warn("failed to retrieve updated allocs; retrying",
"req_index", allocsReq.MinQueryIndex,
"resp_index", allocsResp.Index,
"num_allocs", len(pull),
"wait", retry,
)
select {
case <-time.After(retry):
continue
case <-c.shutdownCh:
return
}
}

// Ensure that we received all the allocations we wanted
pulledAllocs = make(map[string]*structs.Allocation, len(allocsResp.Allocs))
for _, alloc := range allocsResp.Allocs {
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2 changes: 1 addition & 1 deletion nomad/alloc_endpoint.go
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Expand Up @@ -257,7 +257,7 @@ func (a *Alloc) GetAllocs(args *structs.AllocsGetRequest,
reply.Allocs = allocs
reply.Index = maxIndex
} else {
// Use the last index that affected the nodes table
// Use the last index that affected the allocs table
index, err := state.Index("allocs")
if err != nil {
return err
Expand Down
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