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[DOCS] Add ML limitation and troubleshooting (elastic/x-pack-elasticsearch#3929) 

Original commit: elastic/x-pack-elasticsearch@bfabcbb456
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Lisa Cawley 2018-02-14 08:58:29 -08:00 committed by GitHub
parent affc9e3563
commit 22c3060fd6
2 changed files with 38 additions and 1 deletions
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7
docs/en/ml/limitations.asciidoc
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@ -189,3 +189,10 @@ create a forecast:
If you try to create a forecast for this type of job, an error occurs. For more If you try to create a forecast for this type of job, an error occurs. For more
information about any of these functions, see <<ml-functions>>. information about any of these functions, see <<ml-functions>>.
[float]
=== Jobs must be stopped before upgrades
You must stop any {ml} jobs that are running before you start the upgrade
process. For more information, see <<stopping-ml>> and
{stack-ref}/upgrading-elastic-stack.html[Upgrading the Elastic Stack].

30
docs/en/ml/troubleshooting.asciidoc
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@ -84,3 +84,33 @@ Create jobs in {kib} or ensure that you create jobs with valid identifiers when
you use the {ml} APIs. For more information about valid identifiers, see you use the {ml} APIs. For more information about valid identifiers, see
{ref}/ml-put-job.html[Create Jobs API] or {ref}/ml-put-job.html[Create Jobs API] or
{ref}/ml-job-resource.html[Job Resources]. {ref}/ml-job-resource.html[Job Resources].
[[ml-upgradedf]]
=== Upgraded nodes fail to start due to {dfeed} issues
This problem occurs when you have a {dfeed} that contains search or query
domain specific language (DSL) that was discontinued. For example, if you
created a {dfeed} query in 5.x using search syntax that was deprecated in 5.x
and removed in 6.0, you must fix the {dfeed} before you upgrade to 6.0.
*Symptoms:*
* If {ref}/logging.html#deprecation-logging[deprecation logging] is enabled
before the upgrade, deprecation messages are generated when the {dfeeds} attempt
to retrieve data.
* After the upgrade, nodes fail to start and the error indicates that they
failed to read the local state.
*Resolution:*
Before you upgrade, identify the problematic search or query DSL. In 5.6.5 and
later, the Upgrade Assistant detects these scenarios. If you cannot fix the DSL
before the upgrade, you must delete the {dfeed} then re-create it with valid DSL
after the upgrade.
If you do not fix or delete the {dfeed} before the upgrade, in order to successfully
start the failing nodes you must downgrade the nodes then fix the problem per
above.
See also {stack-ref}/upgrading-elastic-stack.html[Upgrading the Elastic Stack].