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app/vmagent/remotewrite: prevent from infinite recursion panic when pushing a time series with big number of samples to remote storage

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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2335
This commit is contained in:
Aliaksandr Valialkin 2022-03-18 19:06:18 +02:00
parent 620b605786
commit ec03dec72d
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2 changed files with 18 additions and 1 deletions
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18
app/vmagent/remotewrite/pendingseries.go
View file

@ -10,6 +10,7 @@ import (
"github.com/VictoriaMetrics/VictoriaMetrics/lib/decimal"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/persistentqueue"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel"
@ -210,7 +211,22 @@ func pushWriteRequest(wr *prompbmarshal.WriteRequest, pushBlock func(block []byt
writeRequestBufPool.Put(bb)
}
// Too big block. Recursively split it into smaller parts.
// Too big block. Recursively split it into smaller parts if possible.
if len(wr.Timeseries) == 1 {
// A single time series left. Recursively split its samples into smaller parts if possible.
samples := wr.Timeseries[0].Samples
if len(samples) == 1 {
logger.Warnf("dropping a sample for metric with too long labels exceeding -remoteWrite.maxBlockSize=%d bytes", maxUnpackedBlockSize.N)
return
}
n := len(samples) / 2
wr.Timeseries[0].Samples = samples[:n]
pushWriteRequest(wr, pushBlock)
wr.Timeseries[0].Samples = samples[n:]
pushWriteRequest(wr, pushBlock)
wr.Timeseries[0].Samples = samples
return
}
timeseries := wr.Timeseries
n := len(timeseries) / 2
wr.Timeseries = timeseries[:n]

1
docs/CHANGELOG.md
View file

@ -26,6 +26,7 @@ The following tip changes can be tested by building VictoriaMetrics components f
* BUGFIX: properly locate series with the given `name` and without the given `label` when using the `name{label=~"foo|"}` series selector. Previously such series could be skipped. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2255). Thanks to @jduncan0000 for discovering and fixing the issue.
* BUGFIX: properly free up memory occupied by deleted cache entries for the following caches: `indexdb/dataBlocks`, `indexdb/indexBlocks`, `storage/indexBlocks`. This should reduce the increased memory usage starting from v1.73.0. See [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2242) and [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007) issue.
* BUGFIX: reduce the interval for checking for free disk space from 30 seconds to 1 second. This should reduce the probability of `no space left on device` panics when `-storage.minFreeDiskSpaceBytes` is set to too low values. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2305).
* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): prevent from panic at vmagent when importing a time series with big number of samples. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2335). Thanks to @bleedfish for discovering and fixing the issue.
## [v1.74.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.74.0)