Document the prohibition on freezing data stream write indices (#58058) (#58705)

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Dan Hermann 2020-06-29 16:34:36 -05:00 committed by GitHub
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@ -24,6 +24,11 @@ metadata in memory) and is read-only. Read-only indices are blocked for write
operations, such as <<indexing,docs-index_>> or <<indices-forcemerge,force
merges>>. See <<frozen-indices>> and <<unfreeze-index-api>>.
The current write index on a data stream cannot be frozen. In order to freeze
the current write index, the data stream must first be
<<rollover-data-stream-ex,rolled over>> so that a new write index is created
and then the previous write index can be frozen.
IMPORTANT: Freezing an index will close the index and reopen it within the same
API call. This causes primaries to not be allocated for a short amount of time
and causes the cluster to go red until the primaries are allocated again. This