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[ML] Correcting model state min_version #1546

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Oct 26, 2020
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[ML] Correcting model state min_version #1546

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[ML] Correcting model state min_version
droberts195 Oct 26, 2020
a8cbeff
Adjusting comment and adding changelog
droberts195 Oct 26, 2020
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1 change: 1 addition & 0 deletions docs/CHANGELOG.asciidoc
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Expand Up @@ -63,6 +63,7 @@
* Avoid potential "Failed to compute quantile" and "No values added to quantile sketch" log errors
training regression and classification models if there are features with mostly missing values.
(See {ml-pull}1500[#1500].)
* Correct the anomaly detection job model state `min_version`. (See {ml-pull}1546[#1546].)

== {es} version 7.9.2

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7 changes: 6 additions & 1 deletion lib/api/CAnomalyJob.cc
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Expand Up @@ -85,7 +85,12 @@ const std::string INTERIM_BUCKET_CORRECTOR_TAG("k");

//! The minimum version required to read the state corresponding to a model snapshot.
//! This should be updated every time there is a breaking change to the model state.
const std::string MODEL_SNAPSHOT_MIN_VERSION("6.4.0");
//! Newer versions are able to read the model state of older versions, but older
//! versions cannot read the model state of newer versions following a breaking
//! change. This constant tells the node assignment code not to load new model states
//! on old nodes in a mixed version cluster. (The last breaking change was in 7.9 in
//! lib/core/CPackedBitVector.cc in https://github.com/elastic/ml-cpp/pull/1340.)
const std::string MODEL_SNAPSHOT_MIN_VERSION("7.9.0");
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//! Persist state as JSON with meaningful tag names.
class CReadableJsonStatePersistInserter : public core::CJsonStatePersistInserter {
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